Table 3:

PML surveillance brain MRI protocol

Field strengthScans should be of good quality, with adequate SNR and resolution (in-section pixel resolution of ≤1 × 1 mm)
Scan prescriptionUse the subcallosal plane to prescribe or reformat axial oblique sections (Fig 1)
CoverageWhole-brain coverage
Sequences3D 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.