TABLE 1.
Scan Parameter | 2D TSE PD-Weighted Sagittal | 2D TSE T2-Weighted Fat Saturated Sagittal | 3D GE (FLASH) Sagittal |
Repetition time TR, ms | 3520 | 3520 | 11 |
Echo time TE, ms | 12 | 63 | 3.7 |
Flip angle | 153 | 147 | 20 |
Averages | 1 | 1 | 1 |
Pixel bandwidth | 250 | 199 | 250 |
Echo train length | 5 | 5 | 1 |
Width × height, mm | 160.0 × 160.0 | 160.0 × 160.0 | 160.0 × 160.0 |
Acquisition matrix (rows × columns) | 512 × 512 | 512 × 512 | 512 × 512 |
Slice thickness, mm | 1.2 | 1.2 | 1.2 |
Number of slices | 36 | 36 | 36 |
Space between slices, mm | 1.44 | 1.44 | – |
Acquisition time, min | 6.01 | 6.0 | 3.23 |
Resolution (pixels per mm) | 3.2 | 3.2 | 3.2 |
Voxel size, mm | 0.3125 × 0.3125 × 1.2 | 0.3125 × 0.3125 × 1.2 | 0.3125 × 0.3125 × 1.2 |
Chemical shift, pixels | ∼1.8 | ∼2.5 | ∼1.8 |
The chemical shift was calculated using the pixel bandwidth (pxBW) and resonance frequency difference between fat and water at 3 T (∼447 Hz). TSE indicates Turbo-Spin-Echo.