59.當超音波遇到一個介質音波阻抗差別極大的界面,如橫膈膜時,所產生的假影(artifact)為下列何者?
(A)鏡像假影 (mirror image artifact)
(B)回音增強 (acoustic enhancement)
(C)切面厚度假影 (slice-thickness artifact)
(D)物體後方衰減(posterior attenuation)
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統計: A(2242), B(148), C(104), D(169), E(0) #1838367
統計: A(2242), B(148), C(104), D(169), E(0) #1838367