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Fig. 3A —Coronal maximum-intensity-projection images of two patients. Image of 77-year-old man in 100-mL group after endovascular repair of thoracic aortic aneurysm and with residual abdominal aortic aneurysm shows uniform enhancement throughout thoracoabdominal-aortoiliac system: top of aortic arch, 356 H; origin of celiac axis, 354 H; and origin of common iliac artery, 343 H. Perivenous artifacts generated by pooling of contrast agent in superior vena cava (SVC) and high attenuation in pulmonary trunk cause blurred MDCT angiogram when injecting 100 mL of contrast medium only; SVC (arrow) was 1,777 H and main pulmonary artery (arrowhead) was 425 H.