Table 1 Sequence parameters for the BH-MRA and FB-TRA sequences
BH-MRA | FB-TRA | |
|---|---|---|
TE/TR (ms) | ~0.8/1.9 | ~1.5/9.1 |
Readouts | Cartesian | Spiral |
Spiral interleaves for fully sampled kx-ky | - | 16 Spiral |
Cardiac gating | ECG | None |
Acceleration factor (in kx-ky) | 2 (GRAPPA) | 4 (SENSE) |
Partial-Fourier in ky | 75 % | - |
Matrix size | ~144×256 | 196×196 |
Image FOV (mm) | ~250×435×260 | 450×450×220 |
Orientation | Sagittal | Transverse |
Number of slices | ~144 | 96 |
Slice thickness (mm) | ~2.0 | 2.3 |
Flip angle | 25o | 25o |
Pixel bandwidth (Hz/pixel) | 1500 | 2170 |
Acceleration factor (in kz) | - | 2 (SENSE) |
Partial-Fourier in kz | 75 % | 75 % |
Breath-hold duration (s) | ~13.5 | Free-breathing |
Measurements | 2 per vasculature of interest(1 pre-contrast, 1 post-contrast) | 50 |
Spatial resolution (mm) | ~1.7×1.7×1.8 | ~2.3×2.3×2.3 |
Temporal resolution (s) | ~13.5 | ~1.3 |
Total acquisition time (m:s) | ~2:30 | ~1:25 |