Table 1. Imaging parameters of the three MRI sequences.
| Parameters | 3D SSFP cor (TRUFI) | 3D GRE UTE cor (VIBE) | 3D GRE tra (VIBE) |
|---|---|---|---|
| Repetition time/Echo time (ms) | 1.6/0.57 | 3.39/0.05 | 2.54/0.66 |
| Acquisition Matrix | 208 x 161 | 256 x 256 | 320 x 157 |
| Slice thickness (mm) | 2.2 | 2 | 2 |
| Flip angle (°) | 30 | 5 | 7 |
| Number of partitions | 96 | 96 | 120 |
| Acquisition time (s) | 18 | 18 | 18 |
| Field of view (mm2) | 450 x 348 | 500 x 500 | 400 x 196 |
| Voxel size (mm3) | 2.16 x 2.16 x 2.2 | 1.95 x 1.95 x 2 | 1.25 x 1.25 x 2 |
| Parallel imaging | Factor 2 | Factor 2 with iterative reconstruction SPIRiT | Factor 4 with CAIPIRINHA |
Cor = coronal orientation; TRUFI = true fast imaging with steady-state free precession; VIBE = volumetric interpolated breath hold- examination; Tra = transverse orientation; SPIRiT = iterative self-consistent parallel imaging reconstruction from arbitrary k-space; CAIPIRINHA = controlled aliasing in parallel imaging results in higher acceleration