Ge discovery ls pet ct scanner

¹⁸F-FDG PET/CT scans were performed on a Biograph mCTx scanner (Siemens, Erlangen, Germany) in nine patients, and the remaining two were scanned using a GE Discovery LS PET/CT scanner (GE Healthcare, Waukesha, WI, USA). All patients were instructed to fast for at least 6 h, and blood glucose level was monitored to ensure the level within normal limits (<7.0 mmol/L). Approximately 60 min after the intravenous injection of 144–467 MBq (3.9–12.6 mCi, 150 μCi/kg) of ¹⁸F-FDG, whole-body PET/CT scan was performed according to the guidelines for tumor imaging with PET/CT 1.0 (20 ). ¹⁸F-FDG with a radiochemical purity >95% was manufactured automatically using the tracer synthesis system of a Tracerlab FXF-N (GE Healthcare, Waukesha, WI, USA; Beijing PET Biotechnology Co., Ltd., China). The corresponding low-dose CT was acquired at 80 mA and 140 kV (GE Healthcare) or automatic mA (Siemens). The acquired CT and PET images were sent to a Xeleris or MMWP workstation for registration and fusion. Lesions with focally increased ¹⁸F-FDG uptake exceeding that of the surrounding normal tissues were considered positive lesions. The region of interest (ROI) was drawn along the margin of the lesion on the PET image, and the maximum standardized uptake value (SUVmax) was measured.