Table 1. MP-MRI Parameters at 1.5 T.
| 1.5 T MR* | ||||
|---|---|---|---|---|
| T2WI | DWI | DCEI** | MRS*** | |
| Repetition time (msec) | 3500 | 3500 | 4 | 1000 |
| Echo time (msec) | 85 | 56.4 | 1.9 | 130 |
| Field of view (mm2) | 240×240 | 260×260 | 360×360 | 110×110 |
| Acquisition matrix | 320×256 | 128×128 | 256×256 | 16×8×8 |
| Flip angle (degrees) | 90, 180 | 90 | 15 | 180 |
| b Values (sec/mm2) | … | 0, 800 | … | … |
| Section thickness (mm) | 4 | 5 | 3.8 | … |
| No. of temporal acquisitions | … | … | 15 | … |
MP-MRI: multiparametric magnetic resonance imaging; MR: magnetic resonance; T2WI: T2-weighted imaging; DWI: diffusion-weighted imaging; DCEI: dynamic contrast enhanced imaging; MRS: magnetic resonance spectroscopy.
* Signa Twinspeed; GE Medical System, Milwaukee, Wis. Used with a 8-channel pelvic phased array coil and an endorectal coil.
** An intravenous injection of 0.1 mmol/kg of gadopentetic acid dimeglumine salt injection (Bayer Schering Pharma, Germany) was performed at 2.0 ml/sec, with saline flush of 15ml.
*** Three-dimensional MRS was performed using the Point Resolved Selective Spectroscopy sequence.