From: PET/CT imaging for tumour response assessment to immunotherapy: current status and future directions
Score | Metabolic activity of lymphoma |
---|---|
1 | No 18F-FDG-uptake above background activity |
2 | 18F-FDG-uptake ≤ mediastinal blood pool activity |
3 | 18F-FDG-uptake between mediastinal blood pool and liver activity |
4 | 18F-FDG-uptake moderately higher than liver activity |
5 | 18F-FDG-uptake markedly higher than liver activity/new lesion(s) |
X | New areas of 18F-FDG-uptake unlikely related to lymphoma |