60. 下列那幾種楔形濾器(Wedge filter)不會影響光子射束品質:① Individualized wedge system ② Dynamic wedge system ③ Virtual wedge system ④ Universal wedge system
(A)①④
(B)②③
(C) ②④
(D)③④

1. 題目解析本題主要考察不同類型的...