Role of FDG PET/CT in Patients With Metastasis of Unknown Origin

"Patient preparation: Patients will fast for 4 - 6 h before PET scanning to optimize the blood sugar level to 160mg/dl. F-18 FDG dose was 0.14 mCi/kg and injected via intravenous route. During the uptake phase of 18F-FDG patients will be rested in a quite warm room.~Procedure:~All PET-CT studies will be done at the nuclear medicine unit in Assuit University Hospital.~PET-CT images will be interpreted at a workstation equipped with fusion software that offers multi-planar reformatted images and enables display of the PET images, CT images, and fused PET/CT images."