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Table 2 Summary of acquisition parameters range prior the optimisation related to Prostate Imaging Reporting and Data System (PiRADSv2 and v2.1)

From: Standardisation of prostate multiparametric MRI across a hospital network: a London experience

Sequence parameter PiRADSv2 standard (PiRADSv2.1 standard) Mean Range
Axial T2-weighted    
Field of view (mm) 120–200 200 170–240
Slice thickness (mm) 3 3.2 3–4
Slice gap (mm) 0 0.3 0.-0.75
Acquired pixel size (mm) × (mm) ≤ 0.4 (frequency) 0.7 (frequency) 0.5–1.0
  ≤ 0.7 (phase) 0.9 (phase) 0.6–1.3
Coronal T2-weighted    
Field of view (mm) 120–200 204 180–240
Slice thickness (mm) 3 3.1 3–4
Slice gap (mm) 0 0.3 0–0.7
Acquired pixel size (mm) × (mm) ≤ 0.4 (frequency) 0.7 (frequency) 0.5–1.0
  ≤ 0.7 (phase) 0.9 (phase) 0.6–1.1
Sagittal T2-weighted    
Field of view (mm) 120–200 212 180–250
Slice thickness (mm) 3 3.5 3–6
Slice gap (mm) 0 0.4 0–2
Acquired pixel size (mm) × (mm) ≤ 0.4 (frequency) 0.8 (frequency) 0.6–1.1
  ≤ 0.7 (phase) 1.0 (phase) 0.6–1.5
Diffusion-weighted MRI (DW-MRI)    
Repetition time (ms) ≥ 3000 4921 1320 -23,651
Echo time (ms) ≤ 90 80 48–117
Field of view (mm) 160–220 275 220–380
Slice thickness (mm) ≤ 4 4.45 2.5–6
Slice gap (mm) 0 0.5 0–1
Acquired pixel size (mm) × (mm) ≤ 2.5 (frequency) 2.23 1.3–4.8
  ≤ 2.5 (phase) 2.64 1.5–4.8
Number of b-values for ADC map At least 2 b-values 3.35 2–4
Proposed b-values (s/mm2) (0), 50, 150, 500, 1000   
High b-value (s/mm2) 1400 at 1.5 T 1333 1200–1500
  2000 at 3 T 1400 1200–1600
Dynamic contrast-enhanced MRI (DCE-MRI)    
Repetition time (ms) < 100 5.4 3.2–8.2
Echo time (ms) < 5 2.25 1.6–3.2
Field of view (mm) Encompass the entire prostate gland and the seminal vesicles 274 205–400
Slice thickness (mm) 3 3 2–6
Slice gap (mm) 0 0.8 0–3
Acquired pixel size (mm) × (mm) ≤ 2.0 (frequency) 1.4 0.75–1.65
  ≤ 2.0 (phase) 1.5 0.75–2.07
Temporal resolution (s) \(\le\) 10 (\(\le\) 15) 14.7 6–32
Total duration ≥ 2 min 5 min 2 min–10 min 46 sec