MRI scans of the brain, including fluid attenuated inversion recovery (FLAIR) and post-gadolinium T1-weighted sequences were acquired on a GE Signa Excite scanner (1.5 Tesla). Regions of contrast-enhancing or necrotic tumor were outlined by a radiologist, and the corresponding volumes were automatically determined using a GE AW workstation running AW version 4.3 software. Imaging with 18F-fluorodeoxyglucose (18F-FDG) was performed using a GE Advance NXi PET scanner (15 cm axial field of view, slice separation 4.3 mm) or a GE Discovery STe 16 PET-CT scanner (15 cm axial field of view, slice separation 3.3 mm).
Advance nxi pet scanner
Manufactured by GE Healthcare
Sourced in United States
The Advance NXi PET scanner is a state-of-the-art diagnostic imaging device developed by GE Healthcare. It utilizes positron emission tomography (PET) technology to capture detailed images of the body's internal structures and functions. The Advance NXi is designed to provide high-quality, accurate data to healthcare professionals for diagnostic and monitoring purposes.
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2 protocols using advance nxi pet scanner
1
Brain MRI and PET Imaging Protocol
2
CT and PET/CT Imaging for Lymph Node Evaluation
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CT scans were obtained with a 64-detector row scanner (Light Speed VCT XT; GE Healthcare, Milwaukee, WI, USA), using the enhanced helical technique (40 mA, 120 kVp, beam width of 10 20 mm, beam pitch of 1.375 1.5). For an enhancement study, 100 mL of contrast medium (Iomeron 300; Bracco, Milan, Italy) were administered intravenously. Lymph nodes with a short-axis diameter of more than 10 mm were considered positive for malignancy. If lymph nodes contained nodular or laminated calcification, they were regarded as benign, regardless of size (20 (link)).
Image acquisition of integrated PET/CT was performed using a PET/CT device (Discovery LS, GE Healthcare, Milwaukee, WI, USA) that consisted of an Advance NXi PET scanner and an eight-slice Light Speed Plus CT scanner. After fasting for at least 6 h before the PET/CT examination, patients received an intravenous injection of 370 MBq of 18F FDG and then rested for 45 min before imaging. Lymph nodes were considered positive for malignancy if the maximum standardized uptake value (SUVmax) was more than 2.5 on 18F FDG PET/CT (21 (link)).
Image acquisition of integrated PET/CT was performed using a PET/CT device (Discovery LS, GE Healthcare, Milwaukee, WI, USA) that consisted of an Advance NXi PET scanner and an eight-slice Light Speed Plus CT scanner. After fasting for at least 6 h before the PET/CT examination, patients received an intravenous injection of 370 MBq of 18F FDG and then rested for 45 min before imaging. Lymph nodes were considered positive for malignancy if the maximum standardized uptake value (SUVmax) was more than 2.5 on 18F FDG PET/CT (21 (link)).
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