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, Sp)之定義,下列那 些正確?①Sp (r) = BSF(r)/BSF(r 0 ) ②Sp (r) = BSF(r 0 )/BSF(r) ③Sp (r) = Sc,p(r)×Sc (r) ④Sp (r) = Sc,p(r)/ Sc (r)
(A)①③
(B)①④
(C)②③
(D)②④
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統計: A(227), B(1751), C(127), D(435), E(0) #1839222
統計: A(227), B(1751), C(127), D(435), E(0) #1839222