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
16.若使用DSA ( digital subtraction angiography )來一併檢査兩側腎臓的動脈,則導管應該放置在下列何處最適當?
(A)celiac artery
(B) superior mesenteric artery
(C)descending aorta above the origin of the renal arteries
(D)femoral artery