Vct 64 pet ct scanner

Whole-body F-18 FDG PET/CT images were acquired using a Discovery ST 8, STE 16, RX16 or a VCT 64 PET/CT scanner (GE Healthcare, Piscataway, NJ). Patients fasted for over 6 hours, and the range of blood glucose levels was 68 to 166 mg/dl (average, 98.4 mg/dl), excluding one data point, which could not be obtained retrospectively. The average FDG dose administered was 12.3 mCi (ranging from 7.3 mCi to 19.8 mCi). Imaging from the skull vertex to the feet or proximal thighs began approximately 60–90 minutes after the intravenous administration of FDG. CT was acquired before PET with tube current modulation (mA/s) at 120 kV. The average amount of iodinated contrast (Omnipaque, GE Healthcare, Princeton, NJ) administered intravenously was 100 ml Omnipaque 350 with an automated injector (Medrad, Bayer HealthCare, Whippany, NJ) at a flow rate of 1–2.5 ml/s, based on the intravenous needle gauge and patient tolerance. All images were reconstructed with a 3.3 mm slice thickness. A breath-hold technique was not used.