Ge discovery vct pet ct set

MRIs were acquired with a GE Discovery MR 750 scanner (GE Healthcare, Little Chalfont, UK). A three-dimensional fast spoiled gradient-echo sequence was employed [repetition time (TR), 8.2 msec; echo time (TE), 3.2 msec; inversion time (TI), 450 msec; slice thickness, 1 mm; number of slices, 156; image matrix, 256×256; field of view (FOV), 24 × 24 cm] and a resting BOLD sequence (TR, 2,000 msec; TI, 450 msec; TE, 30 msec; slice thickness, 4 mm; number of slices, 32; image matrix, 64×64; FOV, 24×24 cm).
¹⁸F-FDG PET images were obtained using a GE Discovery VCT PET-CT set (GE Healthcare). ¹⁸F-FDG was performed using a GE MINI trace medical cyclotron (GE Healthcare) and an FDG automatic synthesis device. Subsequently, quality assurance tests were performed. Prior to the examination, all patients were required to fast for at least 6 h, and the fasting blood glucose levels of the patients were >6.1 mmol/l. ¹⁸F-FDG was injected in an intravenous bolus; the dose was 5.55 MBq/kg. Following the injection, each subject remained in a resting state in a quiet environment for a 50-min uptake period. The brain acquisition time of each patient was 40 min. Brain PET-CT scanning parameters were as follows: Voltage, 120 kV; current, 240 mA; and thickness, 5 mm. An acquisition counter using an iterative method was used to reconstruct the transverse, sagittal and coronal images.

18F-fluorodeoxyglucose (18F-FDG) PET imaging was obtained using GE Discovery™ VCT PET/CT set (GE Medical Systems, USA) in PET-CT Center of People's Hospital of Zhengzhou University. 18F-FDG was synthesized by medical cyclotron GE Minitrace and FDG automatic synthesis device (GE Medical Systems, USA), and quality assurance tests were performed. Before the examination, all patients were required to fast for at least 6 hours and the fasting blood glucose level of each patient was <6.1 mmol/L. 18F-FDG was injected in an intravenous bolus, the dose was 5.55 MBq/kg. After the injection, each subject remained in a resting state in a quiet environment for a 50-minute-uptake period. PET collection was performed using the emission, transmission alternate mode with the transaxial spatial resolution of 3.8 mm at full-width-half-maximum (FWHM). The axial field of view of the scanner was 200-mm-long. The brain scans were performed after whole body scans. The brain acquisition time was 10 minutes. Brain PET/CT scan parameters: Voltage 120 kV, current 240 mA, thickness 5 mm, and the images were reconstructed to transverse, sagittal and coronal images by iterative method.