Chest, Abdomen, and Pelvis CT Imaging

The baseline and follow-up CT images of the chest, abdomen, and pelvis were performed using 128-slice Siemens SOMATOM Force, 256-slice Siemens Definition Flash, 256-slice GE Revolution Apex, or 320-slice UNITED IMAGING UCT960 with the following parameters: tube voltage, 120 keV; tube current, 210 mAs; collimation, 1 mm; and slice thickness, 2 mm. AP images were obtained 30s after an intravenous bolus injection of the contrast agent (Omnipaque 300, GE Healthcare, Shanghai, China) at a concentration of 350 mg/mL and a rate of 1.5 mL/s using a high-pressure pump syringe. The CT images were resampled with a 5 mm slice thickness.