Table 1.
Typical Imaging parameters of the T2-weighted and DWI sequences of both protocols.
| mpMRI | ultra-fast bpMRI | |
|---|---|---|
| Acquisition time (full protocol) | 20 min 33 s | 3 min 28 s (approx. - 80 %) |
| Sequence | T2 TSE | T2 TSE |
| Acquisition time | 3 min 12 s | 1 min 56 s (approx. - 40 %) |
| Orientation | axial | axial |
| Number of slices | 27 | 27 |
| Slice thickness (mm) | 3 | 3 |
| Gap | 0 % | 0 % |
| Field of view (mm2) | 180 × 180 | 179 × 179 |
| Matrix size | 704 × 704 | 640 × 640 |
| Pixel spacing (mm) | 0.26 × 0.26 | 0.28 × 0.28 |
| PAT factor | 3 | 4 |
| Number of excitations | 3 | 2 |
| TR (ms) | 4100 | 4030 |
| TE (ms) | 102 | 101 |
| Flip Angle (º) | 140 | 140 |
| Echo train length | 25 | 25 |
| Sequence | DWI | DWI |
| Sequence type | EPI | EPI |
| Acquisition time | 4 min 50 s | 1 min 32 s (approx. - 70 %) |
| Orientation | axial | axial |
| Number of slices | 27 | 27 |
| Slice thickness (mm) | 3 | 3 |
| Field of view (mm2) | 101 × 199 | 101 × 199 |
| Matrix size | 116 × 228 | 116 × 224 |
| Pixel spacing (mm) | 0.88 × 0.88 | 0.88 × 0.88 |
| Number of excitations | 2/3/10 | 2/3 |
| B-values (s/mm2) | 100, 600, 1000, calculated 2000 | 50, 800, calculated 1400 |
| TR (ms) | 4800 | 4500 |
| TE (ms) | 70 | 68 |
| Flip Angle (º) | 90 | 90 |
| Echo train length | 61 | 61 |