1
The Portable Handheld Dental X-RAY System (Product Name: COCOON) is indicated for
use only by trained and qualified dentists or dental technicians. This is a diagnosis device
that can be used on pediatric and adult patients, designed for taking diagnostic intraoral
dental X-rays using conventional film, PSP (Phosphor plates) or digital sensors. It is
powered by DC adapter or Internal or External battery for a hand-held use.
1. Do not operate this device until you read and review the
accompanying this user manual completely.
2. See the Certificate of Conformance accompanying your device. COCOON also
complies with DHHS Radiation Performance Standard, 21CFR Subchapter J.
3. COCOON is a trademark registered by Dexcowin Co., Ltd in Korea and other
countries. All right reserved.
2
Symbols used in this Manual
SYMBOL NAME DETAIL
Radiation warning “Radiation Warning” sign explains details of possible
user radiation hazard.
Warning "Warning" sign explains details of possible user
damage, death or physical damage.
Caution "Caution" sign explains details of possible body
damage due to incorrect use of the product.
Check
"Check" sign explains details of necessary items that
users should follow in product installation, operation,
and maintenance.
Symbols marked on the packaging of COCOON
SYMBOL NAME DESCRIPTION / FUNCTION
Keep away from rain This symbol means that transport package shall
be kept away from the rain.
Fragile
This symbol means that contents of the
transport package are fragile therefore it shall
be handled with care.
This way up This symbol means that indicates the correct
upright position of the transport package.
3
Symbols marked on COCOON
SYMBOL NAME DESCRIPTION / FUNCTION
Electrical protection Insulated patient application(Type B).
Radiation warning This symbol indicates radiation hazard.
Warning This symbol indicates a hazard.
Consult
accompanying documents
This symbol advises the reader to consult the
accompanying documents.
Manufacturer information
This symbol is followed by the name and
address of the device manufacturer.
Manufacture date
This symbol is followed by the device
manufacture date in the form YYYY-MM.
Serial number This symbol is followed by the device serial
number.
Representatives
information The manufacturer’s EU representative
information shows with this symbol.
Separate collection of electrical and
electronic equipment
Indicates the need for separate collection for
electrical and electronic equipment in
compliance with the Waste Electrical and
Electronic Equipment (WEEE) Directive. This
symbol indicates that electrical and electronic
equipment wastes must not be disposed as
unsorted municipal waste and must be collected
separately. Please contact the manufacturer or
an authorized disposal company to
decommission your equipment according to
local regulations
4
TABLE OF CONTENTS
TABLE OF CONTENTS ................................................................................................................ 4
1 GETTING STARTED ........................................................................................................... 7
1.1 INTENDED USE/ PROHIBITION OF USE ............................................................................................................. 7
1.2 UNPACK AND CHECK COCOON ..................................................................................................................... 7
1.2.1 Product composition .................................................................................................................................................... 7
1.2.2 Preliminary Checks ......................................................................................................................................................11
1.3 PRODUCT FEATURES .......................................................................................................................................... 12
1.3.1 Features ............................................................................................................................................................................12
1.4 PRODUCT SPECIFICATIONS ............................................................................................................................... 13
1.4.1 Device main body .......................................................................................................................................................13
1.4.2 Charger specification .................................................................................................................................................14
1.4.3 Battery charging cradle .............................................................................................................................................14
1.4.4 Each part name of main body...............................................................................................................................15
1.4.5 DC adaptor & cord .....................................................................................................................................................17
1.4.6 Battery charging cradle (Applicable only to Model: DX-7017) ..............................................................18
1.4.7 External Battery (Applicable only to Model: DX-7020) ..............................................................................18
1.5 CHARGING THE BATTERY .................................................................................................................................. 19
2 SAFETY PRECAUTIONS ..................................................................................................21
2.1 RADIATION SAFETY ............................................................................................................................................ 21
2.2 CLEANING ............................................................................................................................................................ 25
2.3 SECURITY, STORAGE, AND TRANSPORTATION .............................................................................................. 26
2.3.1 Storage .............................................................................................................................................................................26
2.3.2 Check for Product storage ......................................................................................................................................27
2.3.3 Transportation and Storage conditions ............................................................................................................27
3 WARNING / CAUTION AND INSTRUCTIONS ...........................................................27
3.1 WARNING AND INSTRUCTIONS ....................................................................................................................... 27
3.1.1 Warning for product use .........................................................................................................................................27
3.1.2 Warnings for Product inspection .........................................................................................................................27
5
3.2 CAUTION AND INSTRUCTIONS ......................................................................................................................... 28
3.2.1 Caution for product use ...........................................................................................................................................28
3.2.2 Caution for storage.....................................................................................................................................................28
3.2.3 Caution for other matters ........................................................................................................................................29
4 ITEMS TO CHECK ............................................................................................................29
4.1 ITEMS TO CHECK ................................................................................................................................................ 29
5 SETUP AND CHECK ........................................................................................................30
5.1 THE BACK SCATTERED SHIELD ......................................................................................................................... 30
5.1.1 Performance of back scattered shield ...............................................................................................................30
5.2 NOT REMOVABLE BATTERY (APPLICABLE ONLY TO MODEL: DX-7017) ................................................. 31
5.3 EXTERNAL BATTERY (APPLICABLE ONLY TO MODEL: DX-7020) .............................................................. 31
5.4 CHECKING FOR POWER AND BATTERY CHARGE STATE .............................................................................. 32
5.5 BASIC FUNCTION CHECKS ................................................................................................................................ 32
6 OPERATION ......................................................................................................................33
6.1 POWERING UP .................................................................................................................................................... 33
6.2 CHECKING THE BATTERY CHARGE ................................................................................................................... 34
6.3 POWERING OFF .................................................................................................................................................. 35
6.4 EXPOSURE TECHNIQUES ................................................................................................................................... 35
6.4.1 Patient's positioning ...................................................................................................................................................35
6.4.2 Film or intraoral sensor positioning ...................................................................................................................35
6.4.3 COCOON positioning ................................................................................................................................................36
6.5 CONTROL OF COCOON ................................................................................................................................. 37
6.5.1 Main control screen composition ........................................................................................................................37
6.5.2 Main control screen....................................................................................................................................................37
6.5.3 Setting the Exposure Time ......................................................................................................................................39
6.5.4 X-RAY exposure ............................................................................................................................................................39
6.5.5 X-RAY parameter set..................................................................................................................................................41
6.5.6 Screen setting ................................................................................................................................................................42
7 QUICK USER GUIDE ........................................................................................................43
8 INSPECTION ITEMS BEFORE REPAIR REQUEST ........................................................46
8.1 CHECK ITEMS BEFORE REQUESTING INSPECTION .......................................................................................... 46
6
8.2 TROUBLESHOOTING ........................................................................................................................................... 47
8.3 MAINTENANCE SCHEDULE ................................................................................................................................ 48
8.3.1 On-going check ............................................................................................................................................................48
8.3.2 Annual User Check ......................................................................................................................................................48
8.3.3 Annual Calibration .......................................................................................................................................................50
8.3.4 Maintenance Log Sheet ............................................................................................................................................51
9 TECHNICAL DESCRIPTION ............................................................................................52
9.1 BASIC TECHNICAL SPECIFICATIONS ................................................................................................................. 52
9.2 HIGH VOLTAGE GENERATOR ............................................................................................................................ 53
9.2.1 X-ray Tube Specifications and Characteristics ...............................................................................................53
9.3 EMC DATA ......................................................................................................................................................... 55
9.3.1 Electromagnetic interference .................................................................................................................................56
MANUAL VERSION 1.1
Revision date: October/2017 File number: IFU-07
7
1 Getting Started
1.1 Intended Use/ Prohibition of use
COCOON is designed for experienced dentists and dental technicians to use for both
adult and pediatric patients to produce diagnostic X-ray images.
COCOON is prohibited for use on patients who known to be or possibly pregnant.
1.2 Unpack and Check COCOON
1.2.1 Product composition
COCOON consists of the item below.
DX-7017
Main body: 1EA
Battery(Lithium Polymer Battery) is embedded inside of main body not removable
DC adapter & Power cord: 1SET
Battery charging cradle: 1EA
User Manual (include product warranty certificate): 1EA
Back Scattered shield: 1EA
Wired remote control switch (Optional): 1EA
Neck strap: 1EA
8
Main body
Battery charging cradle
DC adaptor & Power cord
Neck strap
Back scattered shield
User Manual & Warranty
Certificate
Wired remote controller
(Optional)
Figure 1.1 Product Compositions (DX-7017)
9
DX-7020
Main body: 1EA
External Lithium Polymer Battery: 1 EA
Cradle
Battery charging DC adapter & Power cord: 1SET
User Manual (include product warranty certificate): 1EA
Back Scattered shield: 1EA
Wired remote controller (Optional): 1EA
Neck strap: 1EA
PSU (Power Supply Unit) to the wall (Optional): 1EA
10
Figure 2.2 Product Compositions (DX-7020)
Main body
External Lithium Polymer
Battery Cradle
Neck strap
DC adaptor & Power cord Back scattered shield
User Manual & Warranty
Certificate
Wired remote controller
(Optional)
11
1.2.2 Preliminary Checks
Item Check
Device Labels As shown in Figure 1.2 below, make sure that the label is
attached to the device in place.
Other Labels Make sure that the serial number on the Warranty matches the
device serial number and the device carrying case serial
number.
Collimator cone Inspect for damage. The lead lining must cover the entire
interior surface.
Trigger switch Should move freely in when depressed and out when released.
Control panel Should be smooth and free of scratches, damage or nicks
Label-Outside (applicable to both Model: DX-7017, DX-7020)
○1 E
A Model: DX-7017 A○2 E
A Model: DX-7020
Figure 1.2 labeling on Main Body
12
Inside: X-ray tube assembly
1.3 Product Features
1.3.1 Features
Medical Device Name: Portable Handheld X-RAY System
Product Name: COCOON
Model Name: DX-7017, DX-7020
Display: 3.12” OLED (Resolution: 256 x 64)
Function for user
- Exposure time setup in accordance with adult and child or type of the teeth
- OLED screen brightness control function
- Intuitive Graphic User Interface
- Radiation Exposure Interval Setting Function
- Trigger use
- Automatic Shut Down
Designed for user's wrist protection
Figure 1.3 Labeling on X-ray tube assembly
○1 Model: DX-7017 ○2 Model: DX-7020
13
1.4 Product specifications
1.4.1 Device main body
COCOON Main Body
Model Name DX-7017 DX-7020
X-RAY tube focal spot size 0.4 mm
Protection type B type
Grade for electrical shock
Waterproof rating IPX0
Mode of operation Discontinuous operation
Cooling method Oil cooling method
Total filtration More than 2.3mmAl (inherent filtration: 1.0 mmAl)
Input power 14.8 VDC
Target Angle 12.5˚
Distance to target Distance between target and Focal Spot > 20 cm (8 inches)
Main body weight 2.3 kg (Exclusion Back scattered shield)
Operating temperature 10 - 40℃
Operating humidity 30-75% RH, non-condensing
Atmosphere pressure
condition of use 700 ~ 1060 hPa
Battery Type Embedded inside of main body, not
removable battery type External battery type
kV (fixed) 70kV 70kV
mA (fixed) 1.7mA 2.0mA
Power consumption 350 W 350 W
Exposure time 0.05~1.0sec 0.05~1.0sec
Exposure time setting
interval 0.01 sec 0.01 sec
COCOON LEFT COCOON BACK COCOON TOP COCOON FRONT
Figure 1.4 COCOON drawing
14
1.4.2 Charger specification
Model name: BPL910S16F01
Input: AC 100-240[V], 50/60 [Hz], 0.5 [A]
Output Voltage: DC 16.8 [V]
Output Current: 1.0 [A]
1.4.3 Battery charging cradle
Model name:
Charging voltage: DC 16.8 [V]
Charging current: 1.0 [A]
Discharging voltage (at the time of battery connection): vary depending on
discharging condition
Discharging current (at the time of battery connection): vary depending on
discharging condition
Size: 270(L) x 132(W) x 195(H)
15
X-ray field
Power On/Off Button
Trigger
Safety lock
Exposure lamp
256 x 64 pixel OLED screen
Swing able strap hook ring
X-ray mode control
Handle
1.4.4 Each part name of the main body
Each part name of the main body is as follows.
A○1 E
A DX-7017
Figure 1.5 Each part name of main body (DX-7017)
Back scattered shield
16
X-ray mode control
X-ray field
A○2 E
A DX-7020
Figure 1.6 Each part name of main body (DX-7020)
Back scattered shield
Swingable strap hook ring
Power On/Off Button
256 x 64 pixel OLED screen
Exposure lamp
Trigger
Safety lock
Handle
Output jack connector
17
1.4.5 DC adaptor & cord
The part name of the charger is as shown in Figure 1.6.
Inside: X-ray tube assembly
Charging power jack: supplies DC output power from the adapter.
Output indicator lamp: displays the current output status.
AC input connector: connects the AC input of the power cord.
Charging adapter label: lists the model name, input/output conditions, certification, serial
number, and so on.
AC power cord: connects external AC power.
Figure 1.7 Part name of DC adaptor part
(top)
AC power cord
(BOTTOM)
Label
AC POWER SOCKET
Charging power jack
Output indicator lamp
18
Charging terminals
DC input connector
Charge indicating lamp
1.4.6 Battery charging cradle (Applicable only to Model: DX-7017)
① The name for each part on charging cradle
Charge indicating lamp: Indicates each status of charging or charge completion by
different colors.(red: charging, green: charge completion, yellow: charge error)
Charging terminals: connect the output terminal of the battery pack to charging terminals
of charging cradle and charge the battery.
Battery pack holder: prevents the battery pack from being dispatched when connecting the
battery pack to charging cradle.
DC input connector: receives charging power from charging adaptor
1.4.7 External Battery (Applicable only to Model: DX-7020)
Charge terminal: connect charging power jack of DC adaptor to charge terminal of the
external battery. Then the external battery is charged.
Output terminal jack: supplies DC output power from the external battery. It's length over
than 14.5 inches.
Battery pack holder
Figure 1.8 The part name of charging cradle
Output terminal jack
Battery label
Battery state LED
Charge terminal
Figure 1.9 The part name of external battery
19
③ When charging is finished, battery
charging cradle's and DC adapter's LED
indicator turns on green.
Battery label: lists the model name, input/output conditions, certification, serial number, and
so on.
Battery state LED: indicates each status of charging or charge completion by different colors
(red: charging, green: charge completion)
1.5 Charging the Battery NOTE: The battery is tested and fully charged for shipping at the factory. However, the battery is to
be fully charged prior to initial use to prevent function damage of battery or discharged to lower
level in the case unused stored for a long time period such as three(3) months.
DX-7017
① Connect the AC power cord to the AC socket on the charger.
② Connect the DC output connector to the cradle.
③ Put handle of the main body to the cradle.
④ Connect the AC power cord to a power outlet rated AC 100-240[V], 50-60[HZ].
⑤ Battery charging cradle's and DC adapter's LED indicator turns on the red when
power is connected.
⑥ When charging is finished, Battery charging cradle's and DC adapter's LED indicator
turns on the green.
② Connect the DC output connector to the cradle
then put handle of the main body to the cradle.
Figure 1.10 Charging the battery (DX-7017 IN)
① Connect the AC power cord to
the charger.
20
③ When charging is finished, External
battery's and DC adapter's LED indicator
turns on green.
DX-7020
A○1E
A Connect the AC power cord to the AC socket on the DC adapter
A○2E
A Connect the DC output connector to the External battery
③ Connect the AC power cord to a power outlet rated AC 100-240[V], 50-60[HZ]
④ External battery's and DC adapter's LED indicator turns on the red when power is
connected
⑤ When charging is finished, External battery's and DC adapter's LED indicator turns
on the green
① Connect the AC power cord to
the DC adapter.
② Connect the DC output connector to
the external battery. When power is
connect DC adapter's and External
battery's LED indicator turns on red.
Figure 1.11 Charging the battery (DX-7020 EX)
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2 Safety Precautions
2.1 Radiation Safety
X-ray equipment for Dental Intra-oral radiography DX-7020 and DX-7017 complies
with 21CFR Subchapter J, IEC60601-1-3, IEC60601-2-28, IEC60601-2-65, which
these are regulations on radiation safety and protection.
X-ray operator must be placed behind main body's backscattered shield.
Do not expose the x-ray if anyone else is in the same room unless it is necessary
that the patient be accompanied by another person. If necessary that be
accompanied by another person, that person must then stay out of the direct beam
and wear protective clothing (e.g., lead apron).
X-RAY operator must pay attention to the status of a patient in case of emergency.
X-RAY operator must stop operating if the disorder is detected.
A pregnant or expect to become pregnant woman and child must be advised prior
to X-RAY operation.
Diagnostic Reference Level
Following are comparisons of effective radiation dose with background radiation
exposure for several radiological procedures.
WARNING This X-ray unit could be dangerous to the patients or the operators unless
safe exposure factors, operating instructions and maintenance schedule are
observed.
22
Table 2-1. Diagnostic Reference Level
Reference site: http://www.radiologyinfo.org/en/safety/index.cfm?pg=sfty_xray
Diagnostic Reference Levels in Pediatrics, for standard
five-year-old patients, expressed in entrance surface dose per image, for single
views
Table 2-2. Diagnostic Reference Level in Pediatrics
Diagnostic in Pediatrics
Reference site: http://www.imagegently.org/Procedures/Digital-Radiography
http://www.fda.gov/Radiation-EmittingProducts/
RadiationEmittingProductsandProcedures/MedicalImaging/ucm29
8899.htm
Principles of Radiation Protection
The FDA recommends that imaging professionals follow two principles of radiation protection
of patients developed by the International Commission on Radiological Protection.
For this procedure
* Approximate Effective Radiation
Does
Comparable to Natural Background Radiation Period of
** Additional Lifetime risk of Cancer from
Examination
BONE
Radiography (X-ray)-Spine 1.5 [mSv] 6 [months] Very Low
Radiography (X-ray)-Extremity 0.001 [mSv] 3 [hours] Negligible
DENTAL
Intraoral X-ray 0.005 [mSv] 1 [day] Negligible
Radiograph 5-year old patient, Reference Dose Entrance Surface Dose
per SINGLE VIEW. [Unit: μGy]
Skull AP 1500
Skull LAT 1000
23
1. Justification: The imaging procedure should be judged to do more good than harm to the
individual patient. Therefore, all examinations using ionizing radiation should be performed
only when necessary to answer a medical question, treat a disease, or guide a procedure. The
clinical indication and patient medical history should be carefully considered before referring a
patient for any x-ray examination.
2. Optimization: X-ray examinations should use techniques that are adjusted to administer the
lowest radiation dose that yields an image quality adequate for diagnosis or intervention (i.e.,
radiation doses should be "As Low as Reasonably Achievable"(ALARA)). The equipment used
should be designed for pediatric use; the technique factors used should be chosen based on
the clinical indication, patient size, and anatomical area scanned; and the equipment should be
properly maintained and tested.
How Much Radiation is a Child Exposed to during Dental Radiography?
Every day we are exposed to small amounts of radiation from our environment. This radiation
comes from outer space, the ground, building materials, air, and water. This is called natural
background radiation. The amount of this radiation to which we are exposed depends upon
where we live. For example, those who live in higher elevations (such as Denver, Colorado) are
exposed to more radiation from outer space than people who live at sea level. To minimize the
amount of radiation used to create a dental image, the settings on the X-ray device should be
adjusted depending upon the child’s size. The millisievert (mSv) is a measure of effective
radiation dose to the body. One way of assessing the dental radiation risks is to compare the
radiation doses that result from dental images with estimates of equivalent amounts of natural
background radiation
Table 2-3 Comparison of Radiation effective Dose from various dental and
Medical image procedures to natural background radiation
Estimated effective dose Equivalent Amount of Background Radiation
Natural back ground
radiation 3 mSv/yr
1 Panoramic X-ray Up to 0.02 mSv Up to 3 days
24
What are the Risks to a Child from Radiation from Dental Radiography?
There is no conclusive evidence that radiation from dental diagnostic x-rays causes cancer.
However, major national and international organizations responsible for evaluating radiation
risks agree that we should act as if even low doses of radiation may potentially cause harm
and should always try to minimize radiation exposure. This is particularly important in children
as they are at an approximately 3 to 5 times higher radiation-induced cancer mortality risk
than adults. This is because their developing tissues are inherently more radiosensitive and
because they have more remaining years of life during which a radiation-induced cancer could
develop.
It is estimated that approximately 1 in 1,000 individuals will develop cancer from an exposure
of 10 mSv. Therefore a relative radiation level (RRL) can be provided when considering the risk
for a single x-ray exposure or a course of treatment involving multiple images.
Table 2-4 Relative radiation level (RRL) designations for children and adults
Despite several limitations of estimating radiation dose risk, comparison of the radiation
Effective Dose from various dental Imaging Procedures (Table 2-3) to the RRL (Table 2-4)
shows that for children all dental radiographic procedures have minimal risk.
4 bitewing X-rays Up to .005 mSv Up to 0.6 day
Cephalometric X-ray Up to .006 mSv Up to 1 day
Chest X-ray (single view) Up to 0.01mSv 1 day
Chest X-ray (2 view) Up to 0.1 mSv 10 days
Relative Radiation level Effective Dose Estimate Range (mSv)
Adult Child
None 0 0
Minimal <.1 <.03
Low .1-1 .03-.3
Medium 1-10 .3-3.0
25
How can Radiation Risk to a Child be minimized?
The Image Gently Campaign provides guidance to dental practitioners to minimize radiation
exposure to children. These involve numerous strategies and include:
• Only perform imaging when there is a clear medical or dental benefit to the child.
• Use the lowest amount of radiation for adequate imaging based on the size of the child.
• Only take images on the indicated area and always using the thyroid collar
• Avoid multiple unnecessary images.
• Use alternative diagnostic studies (such as ultrasound or MRI), if possible.
If no abnormality is detected with a dental image does this mean the image was
unnecessary?
Dental x-ray images should be considered only after a thorough clinical examination of the
child. Dental images are taken either to confirm a clinical suspicion of a certain condition or to
eliminate it from further consideration. In the latter case the dental image does not provide a
positive result but is of value in that it may avoid additional tests or procedures.
Encourage dentist/ dental technician
• Select x rays for individual's needs, not merely as a routine
• Use the fastest image receptor possible: E- or F-speed film or digital sensors
• Always use thyroid collars
• Child-size the exposure time
2.2 Cleaning
Power off or separate power supply before cleaning.
Before cleaning the battery charger, make sure that the battery charger is unplugged.
Clean the external surface using a damp cloth and non-oil based detergent and non-
aggressive medical detergent. The spacer cone may be cleaned with cotton wool
soaked with surgical alcohol.
26
2.3 Security, Storage, and Transportation
To prevent unauthorized use, COCOON should be stored securely when not in use.
If you have finished using COCOON, keep it in a separate place to prevent
unauthorized use.
2.3.1 Storage
Store the device in a safe place for access by a qualified person.
The X-RAY section that is in direct contact with the patient should be cleaned with
rubbing alcohol frequently.
Do not use near heaters or heating devices.
Please keep in storage after use.
Do not randomly convert. If SEAL attached to the product is damaged, A/S is not
provided free of charge.
Use device and parts safely after performing regular check-up at designated A/S
center only.
Avoid following places for storage and use of device.
- Place with lots of moisture
- Place with direct sunlight
- Place with lots of dust
- Place with high humidity
- Place with no ventilation
- Place with lots of saltiness
- Place with chemical substance or explosive gas
CAUTION Turn off the device before carrying out cleaning operations.
Do not spray products directly on the device. Apply the product on a clean
cloth.
27
2.3.2 Check for Product storage
Avoid place with high humidity or direct sunlight when storing.
Avoid place with lots of dust, slope, and dirt when storing.
Do not store in place with extreme temperatures.
2.3.3 Transportation and Storage conditions
Transportation and storage temperature: -25 ~ 60 ℃
Transportation and storage humidity: 10 ~ 95 %
Transportation and storage atmosphere pressure: 500 ~ 1060hPa
3 Warning / Caution and instructions
3.1 Warning and instructions
3.1.1 Warning for product use
Do not modify the device without the authorization of the manufacturer.
When using Device, if radiation exposure safety regulations and operation related
guidelines are not followed, both patients and operators can be at risk.
Only authorized skilled technician or person can operate this device.
Please use this device only for a designated purpose.
When using this device, if any abnormalities are found with the patients, please
stop using the device, and ensure the safety of patients.
Please do not randomly alter the device while using.
Make sure fire extinguisher is onsite in case of fire-related emergencies.
Patients with pacemakers may experience a malfunction.
3.1.2 Warnings for Product inspection
28
Do not touch the product, power supply, or plug with wet hands to avoid electrical
shock.
When cleaning the product, please separate the device from a power outlet and
clean it with dry clothes.
3.2 Caution and instructions
3.2.1 Caution for product use
Please ensure not to exceed X-RAY exposure required for image diagnosis.
Handle the device with care; do not use a sharp object or cause a severe impact on
the device. Follow the instruction carefully and use for recommended applications.
Use only at the recommended temperature, humidity and pressure.
Do not let the device get wet or be exposed to liquids.
3.2.2 Caution for storage
Moisture, salinity, dust and etc. can affect the performance of device. Do not store
device in places with such conditions.
Do not store product in places with frequent temperature changes or direct
sunlight for extended periods. In extreme temperatures, the high voltage
generator's cooling and insulating oil could be shrunk, swollen, frozen, or overheat
causing critical damages to device function.
Do not store product together with explosive gas or chemicals.
The device must be stored in protection case. When being damaged physically at
the unsafe place, it may cause critical damages to device function.
Do not place the device on a high shelf or any narrow place. If the device falls, it
may be damaged or harm the user.
29
Do not store the device in the trunk of a car or at cargo van of the vehicle. If the
device must be stored in those locations, ensure it is tightly secured.
3.2.3 Caution for other matters
In case of device breakdown, mark properly and leave it to designated professional
at A/S center
Do not let patients touch the device at their own risk.
If the device is dropped, do not turn it on. Detach power supply and.
When discarding product,
Indicate the need for separate collection for electrical and electronic
product in compliance with the Waste Electrical and Electronic
Equipment (WEEE) Directive. This symbol indicates that electrical and
electronic equipment wastes must not be disposed as unsorted
municipal waste and must be collected separately. Please contact the
manufacturer or an authorized disposal company to decommission
your equipment according to local regulations
4 Items to check
4.1 Items to Check
Read user manual before operating the device for proper usage.
Double check the part of the device that directly contacts patients.
Use device with the designated sequence.
Use device at a stable location with good ventilation.
Clean the device with a dry cloth. Do not wet the device.
Regularly inspect device for malfunctions.
30
5 Setup and Check
5.1 The Backscatter shield
5.1.1 Performance of backscatter shield
Figure 5.1 indicates the scattering radiation area which is changed using back
scatter shield.
The back scattered shield limits scattering radiation area to the intended target.
Patient
Scattering radiation area Scattering
Radiation Area
Back Scatter Shield
Scattering radiation area
without back scattered shield
Scattering radiation area
with back scattered shield
Patient
Figure 5.1 Comparison of Scattering Radiation Areas, with and without use of
Back Scattered Shield
Patient Patient Patient
31
5.2 Not removable battery (Applicable only to Model: DX-7017)
COOCON’s (Model: DX-7017) battery type is not removable battery.
The battery is embedded and not removable from the main body.
Turn on the power to check that the device is working properly.
If it occurred troubleshooting, see section 7.1.
5.3 External Battery (Applicable only to Model: DX-7020)
COCOON’S (Model: DX-7020) battery type is the external battery.
Connect the external battery output terminal to main body's external terminal
connector.
Turn on the power to check that the device is working properly.
If it occurred troubleshooting, see section 7.1.
Figure 5.2 Not removable battery type
Figure 5.3 External battery type
32
5.4 Checking for Power and Battery Charge State
① After fully charging the battery, press and release the POWER button. The OLED display
should illuminate, accompanied by a single audible signal.
② Check the battery level indication and remaining battery level on the upper right of the
main screen.
③ As the battery is low, it would be warned by a buzzer, low battery indicator lamp on
OLED window or warning sound.
④ If battery level gets low, It needs to be charged before use.
5.5 Basic Function Checks
COCOON is calibrated at the factory and tested prior to shipping out. There are no adjustment
options.
① ON/OFF button: Fully charge the COCOON battery. Press the POWER button to check the ON
and OFF button status.
② Increase/Decrease touch panel (Up and Down Arrows): With the device on, press the Increase
and Decrease touch panel to check that
the exposure time displayed on the OLED
display changes appropriately.
③ Automatic Shut-Off: Press the power button to turn the device on and wait for about 3 minutes
until it turns off automatically if it is not in use.
33
Power On/Off button
Selection panel
Direction panel: up/down/left/right
6 Operation
6.1 Powering up
Name for each button on top side of COCOON is shown in figure 6.1
.
After pressing the power button on the top of the main body for 2 seconds, a green
light should appear around the button, along with buzzer sound. The display should
turn on with manufacturer's logo as pictured in Figure 6.2.
Figure 6.2 Manufacturer logo
After logo disappears, Main(X-ray) control screen will be displayed.
Figure 6.1 Name for Each part on top side button and panels
Exposure lamp
34
6.2 Checking the battery charge Low battery will be indicated by a buzzer sound, OLED screen, Low battery indication
lamp and battery warning sound when power is on.
When the battery is replaced during operation, the battery level of the OLED screen
indicates 'LOW' and low battery image is displayed on the upper right of the main
control screen. Also, the battery replacement indicator lamp on the top of the device
flashes amber(Applicable only to Model: DX7020 EX)
The battery level displays on the upper right side of the main control screen are shown
in Figure 6.3. When the battery level is between 0 ~ 15%, please charge the battery.
If the device is used without charging the battery even after the 'LOW' battery indicator is
displayed, the battery warning massage shown in Figure 6.4 appears on the OLED screen for a
few seconds and then the device is forcibly turned off.
Figure 6.4 OLED screen Indicating Low Battery
Figure 6.3 Battery level indication
35
6.3 Powering off
TO turn off COCOON, press down the POWER button for two seconds. (COCOON will turn off
automatically if not used for about 3 minutes.)
6.4 Exposure Techniques
6.4.1 Patient's positioning
Place patient as bilateral symmetry to the chair.
Make sure patient's head is fixed.
It is recommended to set exposure position about 15~30 ˚ from patient's position,
but the degree and position can be adjusted according to the user's convenience.
However, the patient should not move while exposed.
6.4.2 Film or intraoral sensor positioning
X-rays generated by COCOON can be detected by various detectors such as film,
the intraoral sensor (digital) and PSP(Phosphor plates).
Place film or sensor on the teeth and hold it with a finger not to be moved.
In case of use of film or PSP, make sure it's not bent or twisted to avoid the
distortion of the image.
The detector should be placed at the center of focal spot parallel as Figure 6.9.
CHECK Before operator exposes X-ray, position of film or intraoral sensor or PSP
and COCOON should be parallel. If the angle is deviated, the image can be
Figure 6.5 POWER BUTTON
36
Target tooth
Detector
COCOON cone
6.4.3 COCOON positioning
The distance between the end of the cone and the patient must be within 20cm (8
inches) at least from Focal Spot (X-ray focus point).
The target tooth should be located at the center of the cone in order to get a
whole shape of target tooth.
Operate exposure so that the intraoral detector and COOCON'S cone are parallel
and teeth at the center of cone
Figure 6.6 Film or Intraoral sensor positioning
37
6.5 Control of COCOON
6.5.1 Main control screen composition
○1E
A Main(X-ray) control screen
Figure 6.7 Name for each part on Main(X-ray) control screen
Detector type : Indicates the type of used detector.
Selecting adult or child: Patient type can be selected as adult or child.
Status: Indicates the current operating state of the device.
Status of Battery: Indicates the current state of the battery.
Tooth type: Indicates the type of tooth.
Exposure time: Indicates X-ray exposure time.
Indicate selected parameter: Indicates selected parameter among the Detector type,
Patient Type, Tooth Type and Exposure Time parameters.
6.5.2 Main control screen
At main control screen, Detector type, Patient type, Tooth type, the Exposure time
can be adjusted.
Each parameter is adjustable using the touch panel on the main body as shown in
Figure 6.8.
Detector type Exposure Time
Status Status of Battery Selecting Adult or Child
Indicates Selected Parameter
Tooth Type
38
To select the 'Adult' or 'Child' mode, touch the ◀ ▶ touch panel to activate the
parameter and touch the ▲ ▼ touch panel to change the type.
Touch the ◀ ▶ touch panel to activate the exposure time parameter and touch
the ▲ ▼ touch panel to change the exposure time. When the exposure time is
changed, the type of tooth is changed that corresponds to the changed exposure
time.
Touch the ◀ ▶ touch panel to activate the tooth type parameter and touch ▲ ▼
touch panel to change the tooth type. When the tooth type is changed, the
exposure time is changed that corresponds to the changed tooth type.
Figure 6.9 Screen when selecting 'Child' and 'Adult' mode
Figure 6.8 Control screen on the main body
39
6.5.3 Setting the Exposure Time
When power is turned off, the most recent setting for exposure time is stored in memory and
redisplays when power is turned on again.
To change exposure time setting touch the ▲ ▼(increase/ decrease) touch panel.
6.5.4 X-RAY exposure
The position of exposure trigger and safety lock is as shown in Figure 6.10.
When X-ray exposes, the user must keep pressed the exposure trigger.
COCOON's X-ray exposure procedure is described below. Please set up the location
of user and patient at the best for shooting before exposure X-ray.
①Set up the exposure time according to a recommendation for target tooth or
user's experience and preference.
②Place film or digital intraoral sensor or PSP tightly inside the target tooth.
③Place main body to the target tooth and at parallel with film or intraoral
sensor or PSP. Then press X-ray trigger.
Exposure trigger
Safety lock
CAUTION X-ray is generated while x-ray exposure trigger is pressed only. If the
exposure trigger is released while exposure buzzer sounds, exposure stops
immediately.
Figure 6.10 Exposure trigger and Safety catch of COCOON
40
④Keep pressing the trigger until the exposure is finished and place the main
body in a safe place.
⑤Check images from film or sensor or PSP after shooting.
When pressing the trigger, a melody plays to signal the x-ray exposure warning
sound, which is followed by a consecutive buzzer sound. X-ray is only generated
during the period of consecutive buzzer sound.
When X-ray is generated, the 'READY' signal on upper main control screen changes
to 'EXPOSURE'. The X-ray indicating lamp of the main body is changed from green
to yellow.
When the X-ray exposure is finished, the 'EXPOSURE' signal disappear from the
upper main control screen and 'WAITING' signal is displayed. Thereafter the 'READY'
signal returns. When the 'READY' signal returns, the yellow exposure lamp will
return to green.
Exposing of X-ray is only during buzzer sound while the trigger is being pressed,
and exposure will stop when the trigger is released.(DMS method - Dead Man
Switch)
Figure 6.11 Before, during, and After Exposure screen
CAUTION Parameter set by teeth types can vary by sensor type and film, distance to
patient, image preference. Please refer to it as recommendation only.
41
6.5.5 X-RAY parameter set
COCOON's X-ray exposure strength is 70 [kV], 2[mA] or 1.7[mA], 0.05 - 1.5 [s] and
changeable by exposure time.
Exposure time can be adjusted between 0.05 - 0.1 [s]
Please refer to Table 6-1 below to adjust parameter for each tooth type.
Table 6-1. Time set table by tooth
Classification Teeth types and exposure time
Age
Adult - -
Child
- -
Distance between
cone and skin
(18cm)
SENSOR 0.05 ~
0.10
0.10 ~
0.15
0.15 ~
0.20
0.20 ~
0.25
0.25 ~
0.30
0.30 ~
0.35
0.35 ~
0.40
0.40
~
FILM 0.15 ~
0.25
0.25 ~
0.35
0.45 ~
0.55
0.60 ~
0.70
0.70 ~
0.80
0.80 ~
0.90
0.90 ~
1.00
1.00
~
1.10
Distance between
cone and skin
(20cm)
SENSOR 0.10 ~
0.15
0.20 ~
0.25
0.25 ~
0.30
0.35 ~
0.40
0.40 ~
0.45
0.50 ~
0.55
0.65 ~
0.70
0.75
~
FILM 0.25 ~
0.35
0.35 ~
0.45
0.55 ~
0.65
0.70 ~
0.80
0.80 ~
0.90
0.90 ~
1.00
1.00 ~
1.10
1.10
~
CHECK Exposure time set will be saved automatically when the device turns off
and the last setting will stay until a new setting is attempted after the
device turns back on.
42
6.5.6 Screen setting
Touch ▲ ▼ panels together to move to the screen setting. The current menu is
displayed as the location of the cursor. The name of each part of the screen is shown
in Figure 6.12.
Use the 'Select' panel to select the menu with the cursor in front.
Touch ◀ ▶ panels to change the parameter.
Power save time: Indicates that device turns off automatically if not used for a few
minutes.
Software version: Indicates the currently applied software version.
Explanation of products: A brief description of the product is played for about 3
minutes
Sound effect: Guide the function and status to voice.
Audio guidance
Voice Description
Power save time
F/W version
Figure 6.12 Setting screen
43
7 Quick user guide
① Press power button over 1 second. Then the OLED display should illuminate, accompanied
by a single audible signal.
② When Main control screen display, the operator can select parameter, which operator
want changing setting value, by ◀/▶ direction touch panel.
44
③ Operator select parameter which operator want to change setting value, then change
the setting value by ▲/▼ direction touch panel.
④ Check the safety lock position before exposing the x-ray. Then press exposure trigger.
45
⑤ Position of film or intraoral sensor or PSP and COCOON's cone should be parallel. And
the target tooth should be located at the center of the cone in order to get a whole
shape of target tooth.
⑥ Check the X-ray image. If the image is an abnormality, try the above procedure again.
If there is no abnormality, press power button over 1 second in order to turn off the
device.
⑦ After use COCOON, please keep in a safe place.
46
8 Inspection items before repair request
8.1 Check items before requesting inspection
If abnormality is found in product, confirm following items before inspection request
Table 8-1. Steps to take for device malfunctions
SYMPTOM STEPS TO TAKE
Pow
er d
efec
t
After turning on
power, both sound or
OLED screen is not
turned on
Check that the battery is charged.
OLED screen is not
displaying after 'power
on' sound is heard
Check 'Screen brightness' in screen setting. The
darkest level is 1 and brightness level is 10.
Device turns off
automatically while in
use
Check that the battery is charged.
Exposu
re d
efec
t
Exposure sound is not
heard when X-RAY is
exposure
Check if OLED display is main control screen status. X-
ray is exposed with main control screen only.
SYMPTOM STEPS TO TAKE
47
Oth
ers
DC adaptor is not
working
Check that the DC adaptor is connected to the AC
power cord.
Check that the AC power cord is connected correctly
to AC power outlet. Correct input voltage of this
device is AC 100-240V, 50/60[Hz]
When DC adaptor is connected correctly to the power
outlet, LED light at an upper main part of the device
lights up green.
If the device does not operate despite successful
connection, disconnect it from the power outlet and
contact an authorized service center.
8.2 Troubleshooting
Table 8-2. Troubleshooting
PROBLEM CAUSE SOLUTION
Nothing lights up The battery is low. Connect the battery charger
No X-ray emission
The generator is preparing an exposure. No display on the screen.
Wait for ready to X-ray exposure (about 30 seconds)
Button or trigger defective. Call a qualified service technician.
X-ray emission works, but exposure is too light or completely white
Receptor defective. Call a qualified service technician.
Exposure is positioned incorrectly.
Adjust the position of the exposure according to the user manual.
Exposure time is too short. Increase the exposure time.
Device defective. Call a qualified service technician.
X-ray emission works, but
Receptor defective. Change the receptor or compare with another receptor.
48
exposure is too dark Exposure time is too long. Decrease the exposure time.
Device defective Call a qualified service technician.
8.3 Maintenance schedule
Periodically review Section '1.1 Intended use / Prohibition for Use' for use and
product labeling to verify instructions for COCOON.
The user should regularly familiarize themselves with Section 3 Warning / Caution
and, Section 4 Items to Check instructions.
When a malfunction occurs, please refer to section 7 to inspect the item. Please
contact the manufacturer/dealer immediately if the product seems to have
abnormalities.
8.3.1 On-going check
When turning on product power, confirm if 'power on' sound plays, and the normal
initial screen is displayed.
Exposure time setting is changed by using direction touch panel, confirm if time is
changed normally.
When X-ray exposure, confirm if buzzer sound plays and exposure indicating
lamp turns to yellow
After device power on, check that the LED light is on and that the device is
operating properly.
8.3.2 Annual User Check
The user should review the following material yearly, and be sure to record their
results in the Maintenance Log Sheets located in Section 7.3.4.
Power button verification: If you press the power button for 1 second, a beep
will sound to signal that the machine has powered on. While the machine is on,
49
press the power button for 1 second to shut the machine down. Please check
that the machine has indeed turned off.
Confirm that the status on the Main Control screen is 'Ready' and that it blinks
when the 'select' panel is touched.
Dead-man button verification: Set the exposure time to maximum seconds.
Then use the exposure trigger to start the X-ray exposure. Before the exposure
time reaches maximum seconds, release the trigger. Check that the X-ray
exposure is terminated.
Setting verification: Under the setting screen, check that the appropriate
settings have been saved.
DC adaptor verification: Connect the DC adaptor to AC source, and make sure
that the LED light signaling turns on.
50
8.3.3 Annual Calibration
Set up a calibrated Performance Meter (such as the Piranha554) according to
manufacturer's specifications to detect and report the following: X-ray Tube Voltage,
Exposure Time, and Dose.
Measurement Method: Final performance measurements are made using a
Piranha554. Exposure time is measured from the moment X-rays are detected until
they are no longer detected, which means 90% crossing setting is selected with no
timmer delays. Linearity is calculated per IEC60601-2-7, 50.102.2a
Enable the COCOON and, with the collimator perpendicular to the test detector,
check exposures into by using the test detector. Compare results with the factory
release parameters indicated in the chart below.
For results outside these parameters, discontinue use and contact DEXCOWIN.
The user should be calibration every year.
Table 8-3 Test Acceptance Ranges
Test
Description
Acceptance
limits
Exposure Time (mSec)
50ms 100ms 300ms 500mS 1000ms
kVp
Accuracy 70kV ±10%
64 ~
77kV
64 ~
77kV
64 ~
77kV
64 ~
77kV
64 ~
77kV
Timer
Accuracy
Set point
±10%
45 ~
55ms
90 ~
110ms
270 ~
330ms
450 ~
550ms
900 ~
1100ms
51
8.3.4 Maintenance Log Sheet
Table 8-4. Maintenance Log Sheet
Maintenance Test
Year 1 Year 2 Year 3 Year 4 Year 5 Year 6
Date /Initial
Date /Initial
Date /Initial
Date /Initial
Date /Initial
Date /Initial
1. Power button
2. Exposure sequence
3. Remote button
4. Deadman button
5. Setting
6. DC adaptor
7. Calibration
52
9 Technical Description
9.1 Basic Technical specifications
COCOON Main Body
Product Type Portable Handheld X-RAY System
Protection type B type
Grade for electrical shock
Waterproof rating IPX0
Mode of operation Discontinuous operation
Cooling method Oil cooling method
X-ray field 58 [mm] Round
Total filtration More than 2.3mmAl
Input voltage 14.8 VDC
Model Name DX-7017 DX-7020
kV (fixed) 70kV 70kV
mA (fixed) 1.7mA 2.0mA
Power consumption 350 VA 350 VA
Exposure time 0.05~1.0sec 0.05~1.0sec
High voltage Generator
Model name DXG-7015 DXG-7018
Input voltage 14.8VDC
Max Output power 105 W 126 W
Rating 70kV, 1.5mA 70kV, 1.8mA
X-ray tube D-401
Focal spot 0.4 mm
Target Angle 12.5˚
Inherent Filtration At least 1.0mmAl
Operating tube voltage 70kV
53
9.2 High voltage generator
9.2.1 X-ray Tube Specifications and Characteristics
X-ray tube model name D-041
Manufacturer TOSHIBA(JAPAN)
Operating Tube Voltage 70kV
X-ray tube focal spot 0.4
Nominal Anode Input Power (at 1.0s) See rating chart
Constant potential high- voltage generator 430W
Anode Angle 12.5 degree
Material Tungsten
Inherent Filtration At least 1.0 mmAl
X-ray Coverage φ70 mm at SID 200 mm
Anode Heat Content 4300 J
Maximum Radiographic Exposure Time 3.2 s
Figure 9.1 Toshiba D-041 X-ray tube outline drawing
54
Figure 9.2 Maximum rating charts
Figure 9.3 Emission & Filament characteristics
55
9.3 EMC Data
COCOON has been tested to comply with the limits for medical devices in IEC/EN
60601-1-2. These limits are designed to provide reasonable protection against harmful
interference in a typical medical installation.
Mobile RF communications equipment can effect medical devices.
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference
to other devices in the vicinity. However, there is no guarantee that interference will
not occur in a particular installation. If this equipment does cause harmful interference
to other devices, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following
measures.
Reorient or relocate the receiving device.
Increase the separation between the equipment.
Consult the manufacturer or field service technician for help.
WARNING Other cables and accessories may negatively affect EMC performance.
Use of other accessories may result in non-compliance.
COCOON should not be used adjacent to or stacked with other equipment.
If adjacent or stacked use is necessary, COCOON should be observed to
verify normal operation.
56
Table 9-1. Electromagnetic emission
9.3.1 Electromagnetic interference
Radiated emission (electric field): 30 ~ 1000[MHz].
Min. limit margin: 4.9dB at 1000[MHz].
Table 9-2. Radiated emission data
TEST FREQUENCY
[MHz]
ATENNA POL. [H/V]
READING LEVEL [dBuV]
CORRECTION (AF+CL) [dB/m]
EMISSION LEVEL
LIMIT(10m) [dBuV/m]
MARGIN [dBu/V]
Value 1000 H/V- <2.0 30.1 <32.1 37 >4.9
The COCOON is intended for use in electromagnetic environment specified below. The
customer or the user of the COCOON should assure that it is used in such an environment.
Emission test Compliance Electromagnetic environment - guidance
RF emissions – CISPR11 Group 1
The COCOON uses RF energy only for its
internal function. Therefore, its RF emissions
are very low and are not likely to cause any
interference with nearby electronic equipment.
RF emissions- CISPR11 Class B The COCOON is suitable for use in all
establishments, including domestic establish-
ments and those directly connected to the
public low voltage power supply network that
supplies buildings used for domestic
purposes.
Harmonic emissions IEC
61000-3-2 Class A
Voltage
fluctuations/flicker
emissions IEC6100-3-3
Complies
57
Table 9-3. Electromagnetic Susceptibility
FIELD CONTENTS
Radiation field
Frequency range Field strength Modulation Frequency step
80 ~ 2500 [MHz] 3 [V/m]
10 [V/m]
AM 80 [%]
1 [kHz] sine wave 1 [%] / 3 step
Magnetic field
Test frequency Field level(EMF) Duration Axis of
orientation
50 [Hz] 3 [A/m] 60 seconds
each axis X. Y, Z axis
58
9.4 Nominal radiation output
Table 9-4. Dose measured at extremity of 20 cm (8 inch) cone (0 ~ 0.48 sec)
t[sec] D[mGy] t[sec] D[mGy] t[sec] D[mGy] t[sec] D[mGy] t[sec] D[mGy]
0.00 0.00 0.05 0.17 0.06 0.21 0.07 0.24 0.08 0.28
0.09 0.31 0.10 0.35 0.11 0.38 0.12 0.42 0.13 0.46
0.14 0.49 0.15 0.53 0.16 0.57 0.17 0.60 0.18 0.64
0.19 0.67 0.20 0.72 0.21 0.76 0.22 0.79 0.23 0.83
0.24 0.86 0.25 0.90 0.26 0.94 0.27 0.98 0.28 1.01
0.29 1.05 0.30 1.08 0.31 1.12 0.32 1.16 0.33 1.19
0.34 1.23 0.35 1.27 0.36 1.30 0.37 1.34 0.38 1.37
0.39 1.41 0.40 1.45 0.41 1.48 0.42 1.52 0.43 1.55
0.44 1.59 0.45 1.63 0.46 1.66 0.47 1.70 0.48 1.73
Unit: [mGy] ± 20%
Table 9-5. Dose measured at extremity of 20 cm (8 inch) cone (0.49 ~ 1.50 sec)
t[sec] D[mGy] t[sec] D[mGy] t[sec] D[mGy] t[sec] D[mGy] t[sec] D[mGy]
0.49 1.77 0.50 1.81 0.51 1.85 0.52 1.88 0.53 1.92
0.54 1.95 0.55 1.99 0.56 2.03 0.57 2.06 0.58 2.10
0.59 2.13 0.60 2.17 0.61 2.20 0.62 2.24 0.63 2.28
0.64 2.31 0.65 2.35 0.66 2.38 0.67 2.42 0.68 2.45
0.69 2.48 0.70 2.52 0.71 2.55 0.72 2.59 0.73 2.62
0.74 2.66 0.75 2.69 0.76 2.73 0.77 2.76 0.78 2.80
0.79 2.84 0.80 2.87 0.81 2.91 0.82 2.94 0.83 2.97
0.84 3.01 0.85 3.04 0.86 3.07 0.87 3.11 0.88 3.14
0.89 3.18 0.90 3.22 0.91 3.25 0.92 3.28 0.93 3.31
0.94 3.35 0.95 3.38 0.96 3.41 0.97 3.45 0.98 3.49
0.99 3.52 1.00 3.55 1.01 3.60 1.02 3.64 1.03 3.68
59
1.04 3.72 1.05 3.75 1.06 3.79 1.07 3.82 1.08 3.87
1.09 3.90 1.10 3.93 1.11 3.97 1.12 4.00 1.13 4.03
1.14 4.07 1.15 4.10 1.16 4.14 1.17 4.17 1.18 4.20
1.19 4.23 1.20 4.26 1.21 4.29 1.22 4.33 1.23 4.37
1.24 4.40 1.25 4.44 1.26 4.48 1.27 4.51 1.28 4.54
1.29 4.58 1.30 4.61 1.31 4.64 1.32 4.67 1.33 4.70
1.34 4.73 1.35 4.76 1.36 4.80 1.37 4.83 1.38 4.87
1.39 4.90 1.40 4.93 1.41 4.96 1.42 5.00 1.43 5.03
1.44 5.07 1.45 5.10 1.46 5.13 1.47 5.16 1.48 5.19
1.49 5.22 1.50 5.25
Unit: [mGy] ± 20%
Test Condition(Voltage): DC 15 [V]
Test Condition(Room temperature): 25 [℃]
9.5 Dose area product
Dose area product [mGy x ㎠]= nominal radiation output [mGy] x 26.4 [㎠]
Exposed surface (A)
- Standard cone: 58 [mm] Diameter (Round)
- A = π x r2= 3.14 x (29 [mm])2 = 26.4 [㎠]
60
Table 9-6. Dose area product (0 ~ 0.83 sec)
t[sec] DAP t[sec] DAP t[sec] DAP t[sec] DAP t[sec] DAP
0.00 0.00 0.05 4.43 0.06 5.41 0.07 6.36 0.08 7.31
0.09 8.26 0.10 9.21 0.11 10.13 0.12 11.09 0.13 12.05
0.14 13.02 0.15 13.96 0.16 14.92 0.17 15.88 0.18 16.81
0.19 17.81 0.20 19.00 0.21 20.01 0.22 20.92 0.23 21.85
0.24 22.80 0.25 23.81 0.26 24.78 0.27 25.75 0.28 26.69
0.29 27.66 0.30 28.62 0.31 29.59 0.32 30.53 0.33 31.50
0.34 32.49 0.35 33.44 0.36 34.39 0.37 35.35 0.38 36.28
0.39 37.24 0.40 38.22 0.41 39.17 0.42 40.10 0.43 41.03
0.44 42.03 0.45 42.97 0.46 43.87 0.47 44.90 0.48 45.80
0.49 46.76 0.50 47.69 0.51 48.77 0.52 49.72 0.53 50.68
0.54 51.62 0.55 52.56 0.56 53.52 0.57 54.43 0.58 55.36
0.59 56.32 0.60 57.25 0.61 58.18 0.62 59.11 0.63 60.08
0.64 60.98 0.65 61.93 0.66 62.86 0.67 63.79 0.68 64.68
0.69 65.61 0.70 66.49 0.71 67.29 0.72 68.33 0.73 69.25
0.74 70.15 0.75 71.12 0.76 72.13 0.77 72.99 0.78 73.91
0.79 74.95 0.80 75.80 0.81 76.75 0.82 77.66 0.83 78.52
Unit: [mGy] x㎠
Table 9-7. Dose area product (0.84 ~ 1.50 sec)
t[sec] DAP t[sec] DAP t[sec] DAP t[sec] DAP t[sec] DAP
0.84 79.37 0.85 80.26 0.86 81.14 0.87 82.11 0.88 82.99
0.89 84.01 0.90 84,93 0.91 85.78 0.92 86.66 0.93 87.50
0.94 88.39 0.95 89.32 0.96 90.17 0.97 91.05 0.98 92.05
0.99 92.91 1.00 93.84 1.01 94.93 1.02 96.04 1.03 97.16
61
1.04 98.21 1.05 99.06 1.06 100.03 1.07 100.98 1.08 102.12
1.09 103.05 1.10 103.86 1.11 104.75 1.12 105.59 1.13 106.49
1.14 107.39 1.15 108.15 1.16 109.23 1.17 110.02 1.18 110.90
1.19 111.78 1.20 112.55 1.21 113.31 1.22 114.23 1.23 115.42
1.24 116.30 1.25 117.15 1.26 118.28 1.27 119.10 1.28 119.91
1.29 120.83 1.30 121.73 1.31 122.48 1.32 123.40 1.33 124.11
1.34 124.89 1.35 125.74 1.36 126.72 1.37 127.51 1.38 128.57
1.39 129.36 1.40 130.15 1.41 130.94 1.42 132.00 1.43 132.79
1.44 133.85 1.45 134.64 1.46 135.43 1.47 136.22 1.48 137.02
1.49 137.81 1.50 138.60
Unit: [mGy] x㎠
62
9.6 Stray Radiation
9.6.1 Set the significant zone of occupancy
Personal protection equipment such as lead apron must be worn when shooting x-
ray in the significant zone of occupancy as Figure 9.4.
60[cm]
60[cm]
200[cm]
63
Figure 9.4 Significant zone of occupancy
9.6.2 Test method and result of stray radiation
The device and environment setup for measurement of stray radiation is Figure 9.5.
After all setups, measure the stray radiation in the significant zone of occupancy.
Considering use environment of the device, set up the distance between Focal spot
and water equivalent phantom as 20cm and 25cm and measure.
The measuring points in the significant zone of occupancy are every 10cm point
from 0cm to 200cm and the measuring point at each height is as red circles in
Figure 9.5.
Exposure time for each measurement is 1sec.
200[cm]
60[cm]
100[cm]
20 or 25[cm] 15[cm]
25[cm]
60[cm]
Focal spot Water equivalent
phantom
Measurement points
Significant zones of occupancy
Significant zones of occupancy
60[cm]
64
Figure 9.5 Test method of stray radiation
The measurement results of stray radiation at 20cm from Focal spot are as Table 9-8.
Table 9-8. Stray radiation at 20[cm] from focal spot
POINT A POINT B POINT C POINT D POINT E POINT F
0 cm 0.648 0.651 0.679 0.679 1.054 1.042
20 cm 1.029 0.729 1.025 0.848 0.759 0.814
40 cm 1.010 1.562 1.741 1.784 1.272 0.986
60 cm 2.564 2.536 2.36 1.712 1.452 2.048
80 cm 3.972 3.956 3.008 1.604 1.538 1.455
100 cm 5.256 5.032 3.059 1.408 1.075 1.608
120 cm 5.012 2.964 2.808 1.461 1.166 1.266
140 cm 2.364 3.712 3.104 1.512 1.528 1.107
160 cm 1.146 1.872 1.316 2.612 1.444 1.568
180 cm 3.044 1.084 2.124 1.134 1.604 1.111
200 cm 2.636 1.035 0.814 1.191 1.504 1.027
Unit: [mR/h]
ND: Not Detected
0
1
2
3
4
5
6
7
8
9
10
0cm 20cm 40cm 60cm 80cm 100cm 120cm 140cm 160cm 180cm 200cm
A
B
C
D
E
F
65
0
1
2
3
4
5
6
7
8
9
10
0cm 20cm 40cm 60cm 80cm 100cm 120cm 140cm 160cm 180cm 200cm
A
B
C
D
E
F
Figure 9.6 Graph of stray radiation at 20[cm] from focal spot
The measurement results of stray radiation at 25cm from Focal spot are as Table 9-9.
Table 9-9. Stray radiation at 25[cm] from focal spot
POINT A POINT B POINT C POINT D POINT E POINT F
0 cm 0.968 0.714 0.684 0.863 1.212 1.428
20 cm 1.668 2.076 3.108 1.284 1.452 1.332
40 cm 2.868 2.868 3.300 3.000 2.652 2.436
60 cm 3.972 5.808 3.924 3.708 4.332 3.588
80 cm 5.400 6.612 3.876 1.716 0.511 1.404
100 cm 6.708 4.056 0.087 1.572 0.086 0.648
120 cm 7.824 6.348 4.728 2.196 0.853 1.392
140 cm 4.596 5.580 0.766 3.276 1.668 1.500
160 cm 6.192 4.080 4.020 1.872 1.908 2.376
180 cm 4.860 3.972 3.948 2.268 3.168 3.108
200 cm 4.740 2.724 4.524 1.728 2.508 1.584
Unit: [mR/h]
ND: Not Detected
66
Figure 9.7 Graph of stray radiation at 25[cm] from focal spot
9.6.3 Stay radiation with backscattered shield application
Attach back scattered shield as Figure 9.8 and measure stray radiation.
Considering use environment of the device, set up the distance between Focal spot
and water equivalent phantom as 20cm and 25cm and measure.
The measuring points in the significant zone of occupancy are every 10cm point
from 0cm to 200cm and the measuring point at each height is as red circles in
Figure 9.8.
Exposure time for each measurement is 1sec.
200[cm]
100[cm]
20 or 25[cm] 15[cm]
25[cm]
60[cm] Focal spot
Water equivalent phantom
Measurement points
Significant zones of occupancy
Significant zones of occupancy
Back scattered shield
Back scattered shield
67
Figure 9.8 Test method of stray radiation with backscattered shield
The measurement results of stray radiation at 20cm from Focal spot are for Table 9-10.
Table 9-10. Stray radiation at 20[cm] from focal spot with backscattered shield
POINT A POINT B POINT C POINT D POINT E POINT F
0 cm 0.374 0.393 0.41 0.446 0.314 0.364
20 cm 0.577 0.581 0.637 0.351 0.418 0.324
40 cm 0.754 0.754 1.037 0.378 0.434 0.321
60 cm 1.636 1.192 1.183 0.478 0.393 0.452
80 cm 3.956 4.032 1.059 0.692 0.403 0.608
100 cm 3.508 3.476 0.732 0.471 0.627 0.351
120 cm 1.432 2.152 0.692 0.373 0.423 0.076
140 cm 1.684 1.031 0.651 0.031 0.381 0.096
160 cm 0.455 0.429 0.785 0.065 0.386 0.388
180 cm 1.568 0.91 1.628 0.332 0.342 0.392
200 cm 1.721 0.878 0.706 0.351 0.442 0.596
Unit: [mR/h]
ND: Not Detected
0
1
2
3
4
5
6
7
8
9
10
0cm 20cm 40cm 60cm 80cm 100cm 120cm 140cm 160cm 180cm 200cm
A
B
C
D
E
F
60[cm] 60[cm]
68
0
1
2
3
4
5
6
7
8
9
10
0cm 20cm 40cm 60cm 80cm 100cm 120cm 140cm 160cm 180cm 200cm
A
B
C
D
E
F
Figure 9.9 Graph of stray radiation at 20[cm] from focal spot with backscattered shield
The measurement results of stray radiation at 25cm from Focal spot are for Table 9-11.
Table 9-11. Stray radiation at 25[cm] from focal spot with backscattered shield
POINT A POINT B POINT C POINT D POINT E POINT F
0 cm 0.323 0.932 1.266 1.553 1.616 1.280
20 cm 1.319 1.265 2.203 1.637 1.925 1.481
40 cm 2.254 2.350 2.923 1.566 1.406 1.272
60 cm 3.086 4.946 2.734 0.958 0.759 0.963
80 cm 5.132 5.342 1.075 0.493 0.381 0.463
100 cm 4.656 4.178 0.098 0.974 0.974 0.302
120 cm 6.150 5.566 0.563 0.837 0.251 0.438
140 cm 4.121 4.452 1.824 1.037 0.311 0.439
160 cm 5.643 3.036 1.500 0.709 0.592 0.648
180 cm 3.622 3.816 1.572 1.968 1.356 2.148
200 cm 2.276 2.534 2.772 1.142 1.368 1.027
Unit: [mR/h]
ND: Not Detected
69
Figure 9.10 Graph of stray radiation at 25[cm] from focal spot with backscattered shield
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