题目内容
经外周静脉注射行肝脏超声造影的条件是( )
2021-10-14
A.经股静脉插管注射造影剂
B.超声造影剂首先经门静脉进入肝脏
C.超声造影剂微泡直径< lOpm
D.超声造影剂无壳核包裹
E.超声造影剂内微泡均为六氟化硫
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