Variability in SUV biodistribution in delayed PET-MR studies

摘要: 2090 Objectives To evaluate changes in biodistribution of tracer uptake different organs measured at two points time to assess variability SUV measurements delayed imaging when PET-MR study is performed over an hour following a PET-CT scan. Methods In the process evaluation new hybrid scanner consecutive PET scans were obtained after injection FDG 48 patients undergoing The average delay between first (PET-CT) and second (PET-MR) was 94 ± 25 minutes ranging from 49 138 minutes. Changes 10 anatomical regions including brain, cerebellum, lungs, liver, heart, colon, muscle bones as well tumor metastatic lesions present. Results being usually significant change observed all cases. These confirmed form quantitative ROI measurement tissue uptake. While general, pathological malignant seemed increase scan, there difference organs. Conclusions Very little known about normal long periods injection. Our shows with trends This enforces need for very strict control delays image acquisition comparing studies since can significantly affect these