Table 1.
Magnetic resonance imaging sequence parameters
| T2w imaging | rs-EPI DWI | rFOV DWI | ss-EPI DWI | |
|---|---|---|---|---|
| TR (ms) | 4400 | 4650 | 3500 | 3700 |
| TE (ms) | 99 | 68 | 65 | 80 |
| FOV (mm2) | 180 × 180 | 180 × 108 | 120 × 98 | 210 × 210 |
| Voxel size (mm2) | 0.5 × 0.5 × 2.5 | 1.1 × 1.1 × 2.5 | 1.3 × 1.3 × 2.5 | 1.8 × 1.8 × 2.5 |
| b-value (s/mm2) | – | 0, 1000 | 0, 1000 | 0, 1000 |
| Diffusion directions | – | 3 | 3 | 3 |
| Averages per b-value | – | 2,2 | 2,10 | 2,10 |
| PAT mode | GRAPPA | GRAPPA | GRAPPA | GRAPPA |
| Acceleration factor PE | 2 | 2 | 2 | 2 |
| In-plane resolution (mm2) | 0.5 × 0.5 | 1.1 × 1.1 | 1.3 × 1.3 | 1.8 × 1.8 |
| Slice thickness (mm) | 2.5 | 2.5 | 2.5 | 2.5 |
| Base resolution | 384 | 160 | 96 | 120 |
| Echo spacing (mm) | 11.0 | 0.36 | 0.99 | 0.76 |
| Bandwidth (Hz/px) | 250 | 679 | 1158 | 1488 |
| EPI factor | – | 96 | 78 | 120 |
| B0 Shim mode | Standard | Standard | Standard | Standard |
| TA (min) | 1:47 | 3:12 | 2:03 | 2:11 |
rs-EPI DWI, readout-segmented echo-planar imaging diffusion-weighted imaging; rFOV, reduced field-of-view; ss-EPI, single-shot echo-planar imaging; TE, echo time; TR, repetition time, TA, acquisition time, GRAPPA: generalized autocalibrating partially parallel acquisitions