Table 1 Specific sequence parameters for the MRA at 1.5 T (Siemens Avanto) and 3.0T (Siemens TimTrio) using a 6-element body matrix coil and the inbuilt 32-element spine coil
From: Assessment of the kidneys: magnetic resonance angiography, perfusion and diffusion
| Â | 1.5 T MRA slow | 1.5 T MRA fast | 3.0 T MRA |
|---|---|---|---|
TR/TE [ms] | 3.77/1.39 | 3.77/1.39 | 3.14/1.1 |
Flip angle [°] | 25 | 25 | 23 |
Bandwidth [Hz/Px] | 350 | 350 | 510 |
Matrix | 512 × 80% | 512 × 80% | 512 × 80% |
FOV [mm 2 ] | 400 × 87% | 400 × 87% | 400 × 81% |
Phase Oversampling [%] | 0 | 0 | 8 |
Voxel size [mm 3 ] | 0.8 | 0.8 | 0.65 |
Spatial resolution [mm 3 ] | 1 × 0.8 × 1 | 1 × 0.8 × 1 | 0.9 × 0.8 × 0.9 |
Scan time [s] | 26 | 19 | 18 |
Partitions | 80 | 80 | 96 |
Parallel imaging | GRAPPA factor 2 | GRAPPA factor 3 | GRAPPA factor 3 |