上腹部CT读片指(内容详细)

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上腹部ＣＴ读片指南
医学精制
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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
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Biblioteka Baidu
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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
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1. 3 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) 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
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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。
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