Table 2.
Different scan parameters for the experiments used with (0.9mm)3 resolution.
Objective | SNR comparison | SNR comparison | SNR comparison 3D | SNR comparison 3D | SNR comparison | |
---|---|---|---|---|---|---|
Protocol | AA2 | AA3 | D1 | D2 | E | F |
2D/3D | 2D | 2D | 3D | 3D | 3D | 3D |
Resolution | (0.9 mm)3 | (0.9 mm)3 | (0.9 mm)3 | (0.9 mm)3 | (0.9 mm)3 | (0.9 mm)3 |
TE(ms) | 95.6 | 95.6 | 95.6 | 95.6 | 95.6 | 95.6 |
TR(ms) | 12000 | 8000 | 3200 | 1600 | 1600 | 3050 |
FOV (mm3) | 210*210*130 | 210*210*130 | 210×210×130 | 210*210*119 | 210×210×130 | 210×210×130 |
b-value | 0/900/2000/3000 | 0/900/2000/3000 | 0/900/2000/3000 | 0/900/2000/3000 | 0/900/2000/3000 | 33 unique dir 17 for 1500, 16 for 3000 + 4(b=0) |
FOV shift | 1/2 | 1/3 | N/A | N/A | N/A | N/A |
MB | 2 | 3 | 1 | 2 | 1 | 1 |
iPAT | 2 | 2 | 2 | 2 | 2 | 2 |
ESP (ms) | 0.93 | 0.93 | 0.93 | 0.93 | 0.93 | 0.93 |
ETL (ms) | 80.9 | 80.9 | 80.9 | 80.9 | 80.9 | 80.9 |
Partial Fourier | 6/8 | 6/8 | 6/8 | 6/8 | 6/8 | 6/8 |
Average | 6 | 9 (1 for b=0) | 2 | 2 | 1 | 1 |
VAT(s) | 72 | 72 | 38 | 19 | 38 | 37 |
Slice/slab | 72 | 72 | 8 | 8 | 16 | 8 |
Slab | 1 | 1 | 18 | 16 | 9 | 18 |
Slab overlap (slice) | N/A | N/A | 1 | 1 | 1 | 1 |
Slab over-sampling | N/A | N/A | 50% | 50% | 50% | 50% |
Total acq. time | 3m48s+ACS | 3m44s + ACS | 5m04s +ACS | 2m32s +ACS+SBref | 2m32s+ACS | 22m12s |
RF pulse family | Optimized Sinc | Optimized Sinc | HS1 | HS2 | HS1 | HS1 |
Exc/Ref BWTP | ~3.2/ 5.2 | ~3.2/ 5.2 | 8/16 | 8/12 | 8/16 | 8/16 |
Exc/Ref Duration (us) | 2560/4480 | 2560/4480 | 7680/7680 | 7680/7680 | 7680/7680 | 7680/7680 |
Exc/Ref Flip angles | 90°/180° (78°/160°) | 90°/180° (78°/160°) | 90°/180° (70°/160°) | 90°/180° (70°/160°) | 90°/180° (70°/160°) | 90°/180° (70°/160°) |