Table 4 Characteristics of standard sequences in MRI rectal examinations – continuation [24]
From: Magnetic resonance imaging and endorectal ultrasound for diagnosis of rectal lesions
| Â | Philips | Siemens | General Electric |
|---|---|---|---|
(Turbo spin echo) | (Turbo spin echo) | (Fast spin echo XL) | |
Repetition time (ms) | 5,362 | 6,590 | 5,100 |
Echo time (ms) | 100 | 136 | 85 |
No. of slices | 16 | 24 | 28 |
Thickness/gap | 3/0.3 | 3 | 3 |
Interleaved | Yes | Yes | No |
Echo train length | 16 | 8 | 8 |
Matrix in phase encoding | 256 | 256 | 256 |
Matrix in frequency encoding | 256/90% | 256 | 256 |
Phase encoding direction | Foot to head | Foot to head | Superior inferior |
Field of view (mm) | 160 | 160 | 160 |
Rectangular field of view | 100% | 100% | 160 |
Foldover | Right to left | Right to left | No phase wrap |
No. of acquisitions | 6 | 4 | 4 |
Sat bands | None | Superior inferior | Superior inferior |
Scan duration (min:s) | 7:35 | 7:36 | 8:40 |
Other | No DRIVE | No DRIVE | Phase correct on |
Prep phase auto | Prep phase auto | Flow camp on | |
Tailored radiofrequency fast |