20.下列何者用來處理臨床電子射束,隨SSD設定改變而造成劑量輸出的變化?
(A)virtual source position
(B)gap size
(C)equivalent square field
(D)most probable energy
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統計: A(1199), B(138), C(490), D(145), E(0) #2866918
統計: A(1199), B(138), C(490), D(145), E(0) #2866918