Table 1.
MR pulse sequences.
| Parameter | 2D IM-w FSE | 3D DESS WE | 3D T1-w FLASH WE | 2D IM-w FS FSE | 2D T2-w MSME SE |
|---|---|---|---|---|---|
| Plane | Coronal | Sagittal | Coronal | Sagittal | Sagittal |
| Field of view (FOV; mm) | 140 | 140 | 160 | 160 | 120 |
| Matrix | 128×256 | 307×384 | 512×512 | 313×448 | 269×384 |
| Number of slices | 35 | 160 | 80 | 37 | 21 |
| Slice thickness (mm) | 3 | 0.7 | 1.5 | 3 | 3 |
| Repetition time (RT; msec) | 3700 | 16.3 | 20 | 2700 | 3200 |
| Echo time (ET; msec) | 29 | 4.7 | 7.6 | 10,20,30,40, 50,60,70 | 30 |
| Refocusing flip angle (°) | 180 | 25 | 12 | 180 | n/a |
| Bandwidth (Hz/ Pixel) | 352 | 185 | 130 | 248 | 250 |
| Echo train length | 7 | 1 | 1 | 5 | 1 |
| Acquisition time (min) | 3.4 | 10.6 | 8.6 | 4.7 | 10.6 |
IM-w, intermediate-weighted; FSE, fast spin echo; DESS, dual-echo steady-state; WE, water-excitation; FLASH, fast low-angle shot; 3D, three-dimensional; 2D, two-dimensional; FS, fat saturated; MSME, multislice-multiecho; SE, spin echo.