Discovery ste 16 slice pet ct scanner

The PET/CT imaging was carried out on a Discovery STE 16-slice PET/CT scanner (GE Healthcare, USA) at the Tumor Hospital of Shanxi Province. ¹⁸F (fluorine-18) was produced by Minitrace cyclotron (GE, USA), and FDG (deoxidized fluoride glucose) kit was purchased from Jiangsu HuaYi Technology LTD (GE, USA). ¹⁸F-FDG (2-¹⁸F-fluoro-2-deoxy-d-glucose) was synthesized using a TRACERLAB FXN multifunctional synthesizer. The radiochemical purity was at least 90 %.

The patients underwent [18F]FDG-PET/CT for baseline staging before NCRT. Before imaging, the patients fasted for at least 4 h to reduce the effect of serum glucose [12 (link)]. Approximately 60 min after 370 MBq of [18F]FDG was administered to the patients, images were taken using a PET/CT scanner (Discovery STE 16-Slice PET/CT Scanner, GE Healthcare, Milwaukee, WI, USA). The patients were required to rest during the uptake period. A CT topogram was used to label the axial scan range. After the CT was performed, PET images were obtained in the three-dimensional acquisition mode at 2 min per field of view (FOV) with an 11-slice overlap at the borders of the FOV. The CT performed was a low-dose non-contrast CT.
The [18F]FDG-PET data were saved in Advantage Workstation (Ver. 4.4, GE Healthcare). Two nuclear medicine physicians reviewed the images and located the target lesions. The PET/CT workstation quantified [18F]FDG uptake automatically.