Table 1 Technical requirements for multiparametric prostate MRI according to PI-RADS v. 2.1 guidelines

T2w imaging

Same used for DWI and DCE

3 mm

12–20 cm^a

 ≤ 0.7 mm (phase) ×  ≤ 0.4 mm (frequency)

Axial plane: either straight axial to the patient or in an oblique axial plane matching the long axis of the prostate

At least one additional orthogonal plane (sagittal and/or coronal)

3D axial as an adjunct to 2D acquisitions

No gap

DWI

Same used for T2w imaging and DCE

 ≤ 4 mm

16–22 cm

 ≤ 2.5 mm (phase and frequency)

Low b value: 50–100 s/mm²

Intermediate b value: 800–1000 s/mm²

High b value

No gap

Dedicated (≥ 1400 s/mm²)

Synthesised (from other b values)

DCE

Same used for T2w imaging and DWI

3 mm

No specific recommendations^a

 ≤ 2 mm (phase and frequency)

Temporal resolution ≤ 15 s

GBCA: 0.1 mmol/kg

Fat suppression

No gap

Injection rate: 2–3 cc/s

Observation rate  ≥ 2 min