问题 单项选择题

诊断肺栓塞最可靠的直接征象是()

A.一侧肺透亮度增高

B.肺的外围以胸膜为基底的楔状致密影

C.实变区内小透亮区

D.增强扫描肺动脉主干内充盈缺损

E.局限性肺血管稀少

答案

参考答案:D

解析:肺动脉内栓子的显示是诊断肺栓塞最可靠的直接征象,CT增强后血栓表现为长条状及不规则形状低密度样充盈缺损。

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        Hi! My name is Zhang Yan. I'm going to have a busy weekend! On Saturday morning, I'm going to have 

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4. What's Zhang Yan going to do on Sunday? 

                                                                       

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单项选择题