Discovery 64 slice pet ct scanner

The ¹⁸F-FDG-PET/CT studies were obtained using a discovery 64 slice PET/CT scanner from general electric (GE) with bismuth germanium oxide crystals. The patients were nil per os for 6 h prior to the test. After assessment of glucose levels, the patients with glucose level <140 mg/dL were intravenously administered with 10 mCi (370 MBq) of F ¹⁸-FDG. 60 min later, they were taken to the scanner for imaging. A transmission scan (5 mm contiguous axial cuts) was obtained using an integrated multi-slice helical CT from vertex to mid-thighs. The acquisition was obtained with a one-slice overlap at the borders of the field of view to avoid artifacts, using 120 kV, and a 512 × 512 matrix size. Immediately after, and without moving the patient, and emission scan was obtained in three-dimensional-mode in 7-8 beds at 3 min/bed over the same anatomical regions. The PET emission scan was corrected using segmented attenuation data of the conventional transmission scan. A Gaussian filtering (6.4 mm) was performed for smoothing of images. The PET images were reconstructed with a standard iterative algorithm (ordered subsets expectation maximization, two iterative steps, 24 subsets) using (General Electric) software.