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

From: Understanding PI-QUAL for prostate MRI quality: a practical primer for radiologists

  Imaging planes Slice thickness FOV In-plane dimension Specific recommendations
T2w imaging Same used for DWI and DCE 3 mm 12–20 cma  ≤ 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 recommendationsa  ≤ 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  
  1. T2w imaging T2-weighted imaging, DWI diffusion-weighted imaging, DCE dynamic contrast enhanced, FOV field of view, GBCA gadolinium-based contrast agent
  2. aTo encompass the entire prostate gland and seminal vesicles