Table 1.
MR enterography protocol obtained on different MRI systems.
| Parameter | T2 SS-FSE | T2 SS-FSE | T2 FSE with fat suppression | 2D and 3D T1 in/out of phase | DWI | 3D T1WI | 3D T1WI |
|---|---|---|---|---|---|---|---|
| Acquisition plane | Axial | Coronal | Axial | Axial | Axial | Axial* | Coronal** |
| Repetition time [range, ms] | 580-1300 | 582-1300 | 3000-5484 | 3.8-209 | 4000-8000 | 2.90-4.33 | 2.84-4.97 |
| Echo time [range, ms] | 82-228 | 80-91 | 83-116 | 1.23-2.39 | 69.6-94 | 1.24-2.12 | 1.3-2.48 |
| Flip angle | 90 | 90 | 90 | 10-80 | 90 | 10-15 | 10-15 |
| Matrix [range] | 256*256/ 512*512 |
256*256/ 512*512 |
256*256/ 512*512 |
288*288/ 512*512 |
256*256/ 391*384 | 256*256/ 512*512 |
256*256/ 512*416 |
| Field of view [max]*** | 400*400 | 540*370 | 400*400 | 380*380 | 380*360 | 380*380 | 520*340 |
| Slice thickness [mm] | 4-6 | 4-7.2 | 6-7 | 3-7 | 6-7 | 2-5 | 2.8-5 |
| Number of averages | 1 | 1 | 1 | 1 | 1/2/2-4 | 1 | 1 |
| Parallel imaging factor | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| b-Values | - | - | - | - | 50, 400, 800, or 50,500,1000 | - | - |
| Maximum acquisition time | 1:40 min | 1:38 min | 3:48 min | 56 s | 4:23 min | 36 s | 34 s |
SS-FSE, single-shot fast spin echo; FSE, fast spin echo; DWI, diffusion-weighted imaging; T1WI, T1-weighted imaging.
* Pre- and post-contrast injection, obtained at early phase [25 s], parenchymal phase [60 s], and delayed phase [180 s].
**Post-contrast acquisition obtained after 180 s.
***Adapted to patient size.