Table 1 Station-wise MR image acquisition parameters at 1.5T and 3T
From: A whole-body diffusion MRI normal atlas: development, evaluation and initial use
1.5T | 3T | |||||
|---|---|---|---|---|---|---|
Sequence | DWI | T1w Dixon | DWI | T1w Dixon | ||
Sequence details | EPI, AP | EPI, PA | mDIXON | EPI, AP | EPI, PA | LAVA-Flex |
Respiration | Free breathing | mixed* | Free breathing | mixed* | ||
Slices per station (n) | 40 | 96 | 38 | 100 | ||
Overlapping slices (n) | 3 | 8 | 5 | 23 | ||
Fat suppression | STIR | - | STIR | - | ||
Parallel imaging factor | 2.5 | 2 | 2 | 2 | ||
TR (ms) | 5600 | 5.5 | 3500 | 4.1 | ||
TE (ms) | 73 | 1.7/3.7 | 61.7 | 1.7 | ||
TI (ms) | 180 | - | 245.9 | - | ||
Flip angle | 90 | 15 | 90 | 12 | ||
FOV (mm) | 440 × 361 | 400 × 400 | 440 × 352 | 500 × 450 | ||
Acquired matrix | 128 × 103 | 200 × 200 | 128 × 96 | 256 × 212 | ||
Slice thickness (mm) | 6 | 5 | 6 | 5 | ||
Bandwidth (Hz/pxl) | 2719 | 587 | 1953 | 1302 | ||
b-values (s/mm2) | 0, 50, 400, 900 | 0, 50 | - | 0, 50, 400, 900 | 0, 50, 900** | - |
NSA | 2, 2, 4, 9 | 2, 2 | 1 | 2, 2, 4, 9 | 2, 2, 4 | 1 |
Acquisition time | 4:29 min | 0:50 min | 19 s | 3:09 min | 1:35 min | 16 s |