Sequence parameters for DWI, T1WI, T2*WI, FLAIR, and 3D multiecho spoiled GRE sequencea
DWI | T2WI | FLAIR | T2*WI | 3D Multiecho Spoiled GRE (SWI) | |
---|---|---|---|---|---|
TR (ms) | 6000 | 4000 | 12,000 | 800 | 58.4 |
Effective TE (ms) | 60 | 85 | 140 | 17 | No. of TEsb |
Bandwidth (Hz per pixel) | 1953 | 163 | 98 | 31 | ±62.5 |
Flip angle | 90° | 90° | 90° | 30° | 15° |
Section thickness (mm) | 5 | 5 | 5 | 5 | 2 |
Matrix size | 128 × 192 | 512 × 512 | 256 × 224 | 320 × 192 | 320 × 416 |
FOV (mm) | 22 × 22 | 22 × 22 | 22 × 22 | 22 × 22 | 22 × 16.5 |
Acquisition time (min) | 0.5 | 3.3 | 3.5 | 2.5 | 7 |
NEX | 1 | 2 | 1 | 1 | 1 |
Parallel imaging method (reduction factor) | 2 | 2 | NA | NA | 2 |