Table 2 Protocol and applied sequence parameter in 2nd institution with the 1.5 Tesla system (Magnetom Sempra, Germany)
From: Magnetic resonance imaging in the workup of patients with perianal fistulas
Scan parameters | T2_TSE_sagittal_ FS | T2_TSE_axial_ FS | T2_TSE_axial oblique | T2_TSE_coronal oblique | T1_TSE_axial oblique_FS | T1_TSE_coronal oblique_FS | DWI |
|---|---|---|---|---|---|---|---|
Sequence type | Turbo spin echo (TSE) | Turbo spin echo (TSE) | Turbo spin echo (TSE) | Turbo spin echo (TSE) | Turbo spin echo (TSE) | Turbo spin echo (TSE) | Turbo spin echo (TSE) |
Orientation | Sagittal | Axial | Axial oblique | Coronal oblique | Axial oblique | Coronal oblique | Axial oblique |
Number of slices | 25 | 30 | 25 | 25 | 25 | 20 | 25 |
Slice thickness (mm) | 3.5 | 3 | 3 | 3 | 3.5 | 3.5 | 3 |
Slice gap (mm) | 0.75 | 0.6 | 0.6 | 0.6 | 0.75 | 0.75 | 0.7 |
FOV (mm) | 320 × 320 | 220 × 220 | 220 × 220 | 254 × 320 | 210 × 320 | 210 × 320 | 250 × 250 |
TR (ms) | 5600 | 5150 | 6960 | 6200 | 650 | 650 | 5800 |
TE (ms) | 95 | 118 | 97 | 117 | 13 | 13 | 80 |
NEX | 3 | 4 | 3 | 2 | 3 | 3 | 2 |
Fat sup | Yes | Yes | No | No | Yes | Yes | – |
Matrix | 448 × 336 | 448 × 336 | 448 × 336 | 448 × 336 | 384 × 216 | 384 × 216 | 384 × 216 |
Bandwidth (Hz/Px) | 305 | 305 | 305 | 305 | 195 | 195 | 250 |
B value s/mm2 | – | – | – | – | – |  | 0–500–1000 |