問題詳情
11. 已知 100 kVp 的 X 光，其半值層為 0.2 mm 鉛，今若欲將某點 8 mSv/h 的劑量率降為10 uSv/h，試求所需鉛屏蔽的厚度至少為多少 mm？
(A) 0.5
(B) 0.8
(C) 1.5.
(D) 1.9
(A) 0.5
(B) 0.8
(C) 1.5.
(D) 1.9
參考答案
答案：D
難度：適中0.555556
統計：A(0),B(2),C(2),D(5),E(0)
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