76.下圖係用於X光機品保工具,上下正中央的小圓孔可做何種評估?
(A)beam alignment
(B)spatial resolution
(C)focal spot size
(D)collimator test
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統計: A(929), B(46), C(449), D(79), E(0) #3135783
統計: A(929), B(46), C(449), D(79), E(0) #3135783