Jan 19, 2016
CTCT CTXCT1.0mm1.0mm0.5mm0.5mm0.25mm0.25mm25625651251210241024spatial resolution
CTreconstructionrefomationCTdensity resolutionX0.5%
CTCTCTCTXHounsfieldXCTHu Hounsfield unitCT0 Hu,CT +1000 HuCT 1000 HuCT 1000 +1000 Hu2000
CTCTCTCTCTXCT
window widthCT16CTwindow levelCT2000CT200016200016CT2000/16=125 HuCT125 HuCT
CTCTCTCT100 Hu0 HuCT50 Hu40 HuCT -10 +90 Hu
CTCTCTCTCTCT
CT CT
CTCTXX
CTCTXXCTXmAsmACT4X
1partial volume effect 2CTCTCTCTCT
2peripheral space phenomenon 2CTCTX
CT1 CT
2
3 CT
CTCT
CT
510mm510mm0120140kV70260mA60.5s256256CTCTCTCT
5mmCTCT1mm
overlap scan10mm5mm5mmCTX
target scan15mmCT
CThigh resolution CT;HRCTCTCT10Lp/cm0.5mm512512120140kV120220mA12mm
HRCT
stack sliceCTCTmAs13mm450mAs35CTCT
CTquantitative CT;QCTXCTCT80kV810mm123123
CTCTCTXCT
volumetric scanCTCTCT
1011500mosmol/kg600mosmol/kg48500700mosmol/kg300mosmol/kg
CT24ml/s50100ml100180ml50ml
CT10s352s2.53s10sCT
352312cm35mm35341260s2min3 min4 min5 min7 min9 min12 min15 min
delayed contrast seanning46hCT150180ml
CT24ml/s80100ml
CT
CTCTCTCTCTCTCT
CT 1CT 3060minCT60minCT 2CT 14hCT CT
CT CTCT () CT CT24h
CTCTCTCTX0.5cmCT
CTCTcomputed tomographic arteriographyCT-ACT2ml/s5sCTCTCT5070mlCT2040mlCTCT
CTCTcomputed tomographic arterial portographyCTAPCT-A2025sCT150170mLCT100120mLCTAP
CTCTCTX360X
CT80140kV ,50450 mA100s110mmpitch 360X1.0
CTX600mm30s10mm2.0mm30s10mm1.0300mm
CTCTCTCT 120kV3050mA110 mm512512100sCTCTCTCTCTXX
CTCTCTCTCT
CTCTmulti slice CT; MSCTCTX
1 MSCT81634816/2 MSCT0.5s/3X MSCTX7.5mHu1386kHu/min
4X X5 MSCT0.5mm/1310.5s1mmXX
6 MSCT
MSCTCTCT1 MSCTX0.5s80ms
2 MSCTCTXXX3 MSCTCT4X5
MSCTCTMSCT
CTCT CT
multiplane refomationMPR65mmCTMPRCT
CTvolume refomation;VR
1maxium intensity projection; MIP CTMIPMIP2 MIP
surface shaded display;SSDCTCTCTSSDSSDCTCTCTACTCT
CT CTCT virtual endoscopyCTVECTCTVECT100%0Z
CTVECTVECTVE
CT CTCT angiography; CTACTMIPSSDMIPSSD
CTAMRACTADSACTACTCTA
CTCTCT perfusion imagingCT