最新CT、MRI原理.ppt课件.ppt

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1、CT、MRI原理.一、CT基本原理计算机前准直器后准直器X线球管探测器储存、显示、胶片CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY二、CT值（HU）、窗宽（ww）、窗中心（wc）CT20层次2000层次（HU）CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY螺旋CT工作原理CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY不同CT技术比较CHANGZHENHOSPIT

2、ALTHESECONDMILITARYMEDICALUNIVERSITY螺旋CT、多排CT特点：速度快、图像好、射线少新功能：DCT、3D-CT、CTA、CTAP、CTVE、HRCT、骨密度测定、靶扫描CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITYLung4D-CTCHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY3D-CTCHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSIT

3、YTargetScanCHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITYHighResolusionCTScan（HRCT）CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY支气管内膜结核（CTVE）CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY心脏CT-3DCHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY曲面成像：冠

4、状动脉拉直CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITYHCC：CTAresonstructionCHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITYHCC、HHECHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY脾动脉动脉瘤CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY门静脉高压，侧枝循环CHANGZHENHOSPI

5、TALTHESECONDMILITARYMEDICALUNIVERSITY腹腔动脉支架三维重建CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY颈部血管三维重建CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY动脉粥样硬化CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY循环系统4D-CTCHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNI

6、VERSITY4D-CTAAngiographyCHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITYDynamicCTscanArteryPeriodAPPortalPeriodPPDelayPeriodDPCHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITYPortalSystem4D-CTCHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY肩关节三维重建CHANGZHENHOS

7、PITALTHESECONDMILITARYMEDICALUNIVERSITY面骨发育畸形CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY正常颅脑CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITYMRI基本知识长征医院影像科王俭63610109-73658(0)、73675(MRI)、73655(CT)MRI基本构成NS主磁场射频场CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVER

8、SITYMRI工作原理CHANGZHENHOSPITALTHESECONDMILITARYMEDICALUNIVERSITY静止的质子，杂乱排列主磁场作用下质子规则排列射频场终止振动的质子释放能量射频场作用下质子进动、共振计算机运算磁共振图像CHANGZHENH