5.若OID為5cm時,下列何種攝影條件得到的影像清晰度最高?
(A)180 cm SID, 2 mm focal spot
(B)180 cm SID, 1 mm focal spot
(C)100 cm SID, 1 mm focal spot
(D)100 cm SID, 0.5 mm focal spot
17.下列那兩條血管通常匯集至門靜脈?
(A)hepatic and superior mesenteric veins (B)superior mesenteric and splenic veins (C)splenic and renal veins (D)hepatic and splenic veins