Table 1.
Parameters of MRI sequences for prostate RT Planning
| T2W acquisition (2D T2W FSE) | T2*W acquisition (2D “medic”) | |
|---|---|---|
| FOV readout (phase) | 240 mm (100%) | 240 mm (100%) |
| PE oversampling | 60% | 60% |
| Number of Slices | 28 | 28 |
| Slice thickness/gap | 2.5 mm/0 | 2.5 mm/0 |
| Acquisition matrix (phase) | 320 (75%) | 256 (75%) |
| TE/TR | 110 ms/7210 ms | 24 ms/550 ms |
| Averages | 3 | 2 |
| Orientation | Transaxial | Transaxial |
| PE direction | Left/right | Left/right |
| Reconstruction matrix | 320 × 320 | 512 × 512 |
| Receiver bandwidth |
200 Hz/pixel Fat‐water shift = 0.84 mm |
230 Hz/pixel Fat‐water shift = 0.92 mm |
| Pixel size | 0.75 mm × 0.75 mm | 0.46875 mm × 0.46875 mm |
| Other | Echo‐train length 25, echo spacing 9.98 ms, echo‐trains per slice 16 | Combined echoes 5, flip Angle 28 degrees |
| Filters | PrescanNormalize/DistCorrection 2D | PrescanNormalize/DistCorrection 2D |
| Coil arrangement | Spine coil & body array | Spine coil & body array |
| Total acquisition time |
2 min 46 s Parallel imaging = 2 (GRAPPA) |
6 min 4 s Parallel imaging = 2 (GRAPPA) |
FSE: fast spin echo; FOV: field of view; TE: echo time; TR: relaxation time; GRAPPA: GeneRalized Autocalibrating Partial Parallel Acquisition.