上腹部CT读片指讲义.ppt

上腹部上腹部CT读读片指片指Company LogovCT 读片原则读片原则vCT 读片时较一般读片时较一般X 线读片要复杂线读片要复杂,因为因为CT 图像是人体的图像是人体的横断面横断面,同时又有扫描部位与层次问题同时又有扫描部位与层次问题,微小病变也有遗漏微小病变也有遗漏的可能的可能,读片时亦应参考平片、读片时亦应参考平片、MRI、US等影像检查等影像检查,互补互补其不足其不足,发挥各种检查方法的特长发挥各种检查方法的特长,有利于诊断。有利于诊断。v1.1 v扫描位置与层次的判断扫描位置与层次的判断v首先了解人体横断面解剖观察扫描图像位置是否正确首先了解人体横断面解剖观察扫描图像位置是否正确,各脏各脏器是否包括器是否包括,扫描计划是否恰当。扫描计划是否恰当。v1.2 v窗宽与窗位是否正确窗宽与窗位是否正确v扫描后进行摄片时应采取各部位标准窗宽与窗位扫描后进行摄片时应采取各部位标准窗宽与窗位,必要时依必要时依病变不同选取显示最佳窗宽与窗位。如不正确有可能使病病变不同选取显示最佳窗宽与窗位。如不正确有可能使病变不能显示或显示不佳。变不能显示或显示不佳。v平扫与增强平扫与增强Company Logov1.3 v读片时仔细观察首先了解是平描或增强扫描读片时仔细观察首先了解是平描或增强扫描(注射碘水造影剂注射碘水造影剂)v1.4 v详细阅读图像及资料详细阅读图像及资料v要了解机器扫描条件、病人资料、检查日期以及某某医院等等要了解机器扫描条件、病人资料、检查日期以及某某医院等等,作为诊作为诊断的参考。断的参考。v1.5 v异常影像的观察异常影像的观察v如发现异常影像时如发现异常影像时,则要对病变影像的部位、大小与数目、边缘、密度、则要对病变影像的部位、大小与数目、边缘、密度、内部结构以及与周围的关系等作详细观察。如为复查则需对病变的动内部结构以及与周围的关系等作详细观察。如为复查则需对病变的动态进行描述。态进行描述。v1.6 v分析与判断分析与判断v发现异常影像发现异常影像,对影像作全面的分析、推理对影像作全面的分析、推理,最后作出判断。诊断的基最后作出判断。诊断的基础是首先了解正常影象解剖础是首先了解正常影象解剖,并对各种疾病的病理变化有深入的了解并对各种疾病的病理变化有深入的了解,再结合病史、主诉再结合病史、主诉,不难作出正确的判断。不难作出正确的判断。Company LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany LogoCompany Logo