Brilliance 64 slice spiral ct scanner

The Siemens SOMATOM Definition AS+128-slice spiral CT scanner and Philips Brilliance 64-slice spiral CT scanner were applied for scanning. Scanning parameters of the Siemens CT scanner were set as follows: tube voltage 120 KV, tube current 250 mA, pitch 1.1, reconstruction slice thickness 1 mm, reconstruction interval 1 mm. Philips CT scanner parameters: tube voltage 130 KV, tube current 200 mA, pitch 0.64, reconstruction slice thickness 1mm, reconstruction interval 1 mm. All patients underwent breath-holding training before scanning. During the scanning, breath-holding was required under free-breathing. The scan range was from the apex of the lung to the base of the lung, covering the axilla and chest wall on both sides. The bone algorithm was employed for reconstruction.

All patients fasted for more than 8 hours and were instructed to drink 600–1000 mL of water before the CT scan. Subsequently, a Philips Brilliance 64-slice spiral CT scanner was used to perform a contrast-enhanced scan of the patient’s abdomen, and the scan range covered the entire stomach area. Scanning parameters: The patient was in the supine position, the tube voltage was 100–120 kV, the tube current was 250 mA, and FOV 360 × 360mm. The pitch was 0.75 mm, the layer thickness was 3 mm, the spiral scanning mode was used, and the rotation time was 0.75s. After the CT, the patient used an automatic power pump syringe (Ultravist, 300 mg/ml, Schering, Germany) to apply an iodine contrast agent (1.5 mL/kg; Ultravist 370; Bayer Schering Pharma, Germany). The dose was injected into the antecubital vein, and the injection rate was 3.5 mL/s. The acquisition times of CT images in the arterial phase, portal phase, and delay phase were 30 s, 50 s, and 180 s after injection respectively.