题目内容
源皮距(SSD)是指
2021-12-10
A.射线源到治疗床面的距离
B.射线源到模体表面照射野中心的距离
C.射线源到人体皮肤表面某一点的距离
D.射线源到人体皮肤表面最近点的距离
E.射线源到人体皮肤表面最远点的距离
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