試題詳解

34.假設 r ₀ 為參考照野大小，r 為照野大小，關於假體散射因子（phantom scatter factor, S_p）之定義，下列那 些正確？①S_p (r) = BSF(r)/BSF(r ₀ ) ②S_p (r) = BSF(r ₀ )/BSF(r) ③S_p (r) = S_c,p(r)×Sc (r) ④S_p (r) = S_c,p(r)/ S_c (r)
(A)①③
(B)①④
(C)②③
(D)②④