心臟CT發(fā)展史

1、2nd Symposium on Multislice CT of the Chinese Society of Radiology2nd Symposium on Multislice CT of the Chinese Society of Radiology& Stanford University, School of Medicine& Stanford University, School of MedicineAugust 13-15, 2009August 13-15, 2009Dalian, ChinaDalian, ChinaSir Godfrey N. H

2、ounsfield1919-2004Alan M. Cormack1924-19981979 諾貝爾醫(yī)學與生理學獎sourcedetectorattenuationattenuation平行束投影160 采樣 180 角度 (每 1) 160 采樣 180 角度 (每 1) 掃描時間: 4.5 分鐘 !平行束投影sourcedetector測量射線衰減 180 (+扇角) 機架旋轉12336036036036036036000.51.52.503603.53604 sec36036036036036036001.511.522.5303603.53604 secHausleitner et a

3、l. JAMA. 2009;301:500-507Range of medians: 329-2147 mGy*cm4.6 - 30.1 mSvn=1965 patients, at 50 study sitesDose-length-produt (mGy*cm)Hausleitner et al. JAMA. 2009;301:500-507Range of medians: 329-2147 mGy*cm4.6 - 30.1 mSvn=1965 patients, at 50 study sitesDose-length-produt (mGy*cm)360360360360360360

4、01.511.522.5303603.53604 secRSNA 2008 technical exhibition19歲男性, 冠脈畸形LAD起于RCA, 間隔支測量射線衰減 180 (+扇角) 機架旋轉半圈重建, 需要180投影數(shù)據(jù) (+扇角)syst syst (81% RR)(81% RR)diast diast (32% RR)(32% RR)editededited(-600ms)(-600ms)改進 燙陽極 Coolidge 球管 (1913)GE Performix Tube Straton tubeStraton tubePhoto: CourtesyPhoto: Court

5、esyof Siemensof SiemensMotorMotorX-raysX-raysElectron beamElectron beamDeflection coilsDeflection coilsOil for coolingOil for coolingSchardt et al. Medical Physics 2004; 31:2699-2706(Coolidge, General Electric Company, US Patent 1.215.116, 1917)Flohr, Eur.Radiol 200533 cm-10010203040-500050032 row d

6、etector , slicewidth: 0.6mm, pitch: 1.5 Rf=595mm, Rd=490.6mm, p=0 mm-10010203040506070-500050032 row detector , slicewidth: 0.6mm, pitch: 3 Rf=595mm, Rd=490.6mm, p=0 mm-10010203040506070-500050032 row detector , slicewidth: 0.6mm, pitch: 3 Rf=595mm, Rd=490.6mm, p=0 mmSFOVz-direction2nd Symposium on Multislice CT of the Chinese Society of Radiology2nd Symposium on Multislice CT of the Chinese Society of Radiology& Stanford University, School of Medicine&