Table 1.
MRI acquisition parameters
| MRI parameter | Standard CAIPIRINHA-VIBE | DL CAIPIRINHA-VIBE | HR-DL CAIPIRINHA-VIBE |
|---|---|---|---|
| Orientation | Axial | Axial | Axial |
| Repetition time, ms | 3.3 | 3.1 | 3.1 |
| Echo time, ms | 1.21 | 1.21 | 1.16 |
| Flip angle, degree | 11 | 11 | 11 |
| Receiver bandwidth, Hertz/pixel | 590 | 590 | 600 |
| Field of view, mm2 | 380 × 313 | 380 × 313 | 380 × 313 |
| Matrix | 352 × 203 | 352 × 203 | 320 × 224 |
| Slice thickness, mm | 3.0 | 3.0 | 1.0 |
| Number of slice | 64 | 64 | 192 |
| Acquired voxel size, mm3 | 1.1 × 1.5 × 6.0 | 1.1 × 1.5 × 6.0 | 1.2 × 1.4 × 2.0 |
| Reconstructed voxel size, mm3 | 0.5 × 0.5 × 3.0 | 0.5 × 0.5 × 3.0 | 0.6 × 0.6 × 1.0 |
| Number of excitation | 1 | 1 | 1 |
| Acceleration factor | 4 | 4 | 6 |
| Acquisition time, s | 17 | 11 | 16 |
CAIPIRINHA controlled aliasing in parallel imaging results in higher acceleration, DL deep learning, HR high resolution, MRI magnetic resonance imaging, VIBE volumetric interpolated breath-hold examination
For precontrast image, standard CAIPIRINHA-VIBE and DL CAIPIRINHA-VIBE were performed
For HBP image, standard CAIPIRINHA-VIBE, DL CAIPIRINHA-VIBE, and HR-DL CAIPIRINHA-VIBE were performed