《上腹部CT读片指》PPT课件.ppt

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1、上腹部读片指南,Company Logo,CT 读片原则CT 读片时较一般X 线读片要复杂,因为CT 图像是人体的横断面,同时又有扫描部位与层次问题,微小病变也有遗漏的可能,读片时亦应参考平片、MRI、US等影像检查,互补其不足,发挥各种检查方法的特长,有利于诊断。1.1 扫描位置与层次的判断首先了解人体横断面解剖观察扫描图像位置是否正确,各脏器是否包括,扫描计划是否恰当。1.2 窗宽与窗位是否正确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。平扫与增强,Company Logo,1.3 读片时仔细观察首先了解是平描

2、或增强扫描(注射碘水造影剂)1.4 详细阅读图像及资料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,作为诊断的参考。1.5 异常影像的观察如发现异常影像时,则要对病变影像的部位、大小与数目、边缘、密度、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。1.6 分析与判断发现异常影像,对影像作全面的分析、推理,最后作出判断。诊断的基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,再结合病史、主诉,不难作出正确的判断。,Company Logo,Company Logo,Company Logo,Company Logo,Company Logo,Co

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