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| Score | PET/CT scan result | At iPET | At end-of-treatment |
| 1 | No uptake | CMR | CMR |
| 2 | Uptake ≤ mediastinum | CMR | CMR |
| 3 | Liver ≥ Uptake > mediastinum | Inadequate response | Good prognosis |
| 4 | Uptake moderately higher than liver | PMR | Treatment failure |
| 5 | Uptake markedly higher than liver and/or new lesions | PMR | Treatment failure |
| X | New areas of uptake unlikely to be related to lymphoma |
iPET: Interim positron emission tomography; CMR: Complete metabolic response; PMR: Partial metabolic response.
