Table I.
Details of MRI techniques.
| Technique | TR (msec) | TE (msec) | FA | BW (Hz) | Profile order | TFE | Voxel size (mm) | Fat supression | Diffusion b-factor | No. of signal averages | Scan time | Dynamic phase | Slice orientation |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffusion-weighted image: single shot EPI | 4067 | 82 | 90 | 22.2 | - | - | 2.23 (0.98) × 2.80 (0.98) × 3.5 | SPAIR | 0, 800 | 6 | 1 min 55 sec | - | Transverse |
| Dynamic study: 3D FFE | 11.0 | 5.6 | 20 | 992.1 | - | - | 1.12 (0.49) × 1.12 (0.49) × 10.0 (5.0) | Proset (1:3:3:1) | - | 1 | 30.2 sec/phase | 6 (pre,1,1.5, 2,4,6 min) | Coronal |
| High resolution image: 3D TFE | 3.5 | 1.74 | 10 | 1183.7 | Low-high radial | 40 | 1.33 (0.80) × 1.33 (0.80) ×1.70 (0.85) | SPAIR | - | 3 | 2 min 9 sec | - | Sagittal |
MRI, magnetic resonance imaging; BW, bandwidth; EPI, echo planar imaging; FA, fractional anisotorpy; FFE, fast field echo; SPAIR, spectral adiabatic inversion recovery; TE, echo time; TFE, turbo field echo; TR, repetition time.