Dste pet ct scanner

All patients underwent routine ¹⁸F-FDG PET/CT scans with either the DSTe PET/CT scanner (GE Healthcare, Milwaukee, WI) or the Biograph TruePoint 40 PET/CT scanner (Siemens Medical Systems, CTI, Knoxv/ille, TN). Before ¹⁸F-FDG injections, all patients fasted for at least 6 hours, and peripheral blood glucose levels were confirmed to be ≥140 mg/dL. The ¹⁸F-FDG dose of approximately 5.5 MBq/kg body weight was administered intravenously 1 hour before image acquisition. After the initial low-dose CT (DSTe: 30mA, 130 kVp, Biograph TruePoint: 36 mA, 120 kVp), standard PET imaging was performed from neck to the proximal thighs (acquisition time, 3 min/bed) in three-dimensional mode. Images were then reconstructed using ordered-subset expectation maximization (2 iterations, 20 subsets). Written informed consent was obtained from all patients undergoing ¹⁸F-FDG PET/CT scans.
Images were reviewed by an experienced nuclear medicine specialist on a GE AW 4.0 workstation. On PET scans, a volume of interest (VOI) was drawn on the primary lesion; SUVmax of the GIST was recorded.

¹⁸F-FDG PET was performed for each animal at 2 weeks after the second stage of surgery. A mean of 96 MBq of ¹⁸F-FDG (range, 89–100 MBq) was injected into the ear artery. The animals were not fasted before ¹⁸F-FDG administration. PET/CT scanning was performed 40 min after the injection of ¹⁸ F-FDG with the GE DSTE PET/CT scanner that was equipped with a three-dimensional (3D) mode image acquisition system. The PET acquires 47 contiguous slices with an axial field of view of 70 cm. The slice thickness of the scanner is 3.75 mm, and the spatial resolution was 6 mm in full width at half maximum in the center of the field of view. The CT was performed using a 16-slice helical CT. The CT scan data were collected at an auto mAs and 120 kV. After the CT scan, an emission scan was obtained from knee at a rate of 3 min per bed. Attenuation-corrected PET images using the CT data were reconstructed using an ordered subset expected maximization algorithm (20 subsets, 2 iterations).