PML surveillance brain MRI protocol
| Parameters | Description |
|---|---|
| Field strength | Scans should be of good quality, with adequate SNR and resolution (in-section pixel resolution of ≤1 × 1 mm) |
| Scan prescription | Use the subcallosal plane to prescribe or reformat axial oblique sections (Fig 1) |
| Coverage | Whole-brain coverage |
| Sequences | 3D sagittal T2WI FLAIRa |
| 2D axial DWI (5-mm-thick, no gap) | |
| Section thickness and gap | ≤3 mm, No gap (for 2D acquisition or 3D reconstruction) |
↵a If unable to perform a 3D acquisition, then perform 2D axial FLAIR at ≤3-mm section thickness.