Lecture (16 )
Lecture (16 )
Knee Joint • Basic Projections• AP• Lateral• Oblique• TunnelAP Knee Joint
Exposure Factors
Kv mAs FFD (cm) Grid Focus Cassette
65 5 100 No Fine 18x24 cm
•Patient Position
• �ٍSupine with leg extended
• Part position• Adjust knee to cassette • Slightly rotate leg medially• to centralize patella• Central Ray• 5-7 degrees cephalic
• Center Point
• ½ inch inferior to patellar apex • Structure shown• Femorotibial joint • Distal femur and proximal • tibia & fibul
• Lateral knee joint
Mediolateral or lateromdial
Patient Position Semi prone turn onto affected sideKnee flexed 20-30 degreesPart positionCenter knee by placing cassette 1 inch distal to medial condoyle Central Ray5degrees cephalic Center Point 1 inch inferior to medial condoyleStructure shown Lateral view of distal femur and Proximal tibia , patella
• AP Oblique knee joint ( Lateral or external rotation )
Patient Position �ٍSupine
extend affected kneePart positionAdjust knee to cassette Rotate affected knee with entire leg 45 degrees laterallyCentral RayPerpendicular Center Point At level of patella apex
Structure shownOblique view of distal femur and Proximal tibia and fibula , patella
• Medial Oblique knee joint
Patient Position �ٍ Supine extend affected kneePart positionAdjust knee to cassette Rotate affected knee with entire leg 45 degrees mediallyCentral RayPerpendicular Center Point At level of patella apex Structure shownOblique view of distal femur and Proximal tibia and fibula, patella