Table 1.
MR imaging protocol
| Axial T1WI | Axial T2WI | Sagittal T2WI | Axial oblique T2WI | Axial DWI* | Axial T1WI postcontrast | |
|---|---|---|---|---|---|---|
| GE signa excite HD 3.0T | ||||||
| Technique | FSE | FS FSE | FSE | FSE | SS-EPI | LAVA |
| TR (ms)/TE (ms) | 620/8.2 | 5900/121 | 4920/139.1 | 4900/131.5 | 4400/64.3 | 4.1/1.8 |
| Field of view (cm) | 38.0 | 34.0 | 30.0 | 22.0 | 34.0 | 35.0 |
| Matrix (phase × frequency) | 320 × 224 | 320 × 256 | 320 × 256 | 320 × 256 | 256 × 256 | 350 × 350 |
| Slice thickness (mm) | 5 | 5 | 4 | 3 | 5 | 1 |
| Slice gap | 1 | 1 | 0.4 | 0 | 1 | 0 |
| b value(s/mm2) | – | – | – | – | 0, 800 | – |
| GE Discovery HD750 3.0T | ||||||
| Technique | LAVA-Flex | FS FSE | FSE | FSE | SS-EPI | LAVA |
| TR (ms)/TE (ms) | 4.2/1.3 | 5100/106.6 | 5620/135.6 | 5500/102.0 | 5500/62.7 | 7.9/4.1 |
| Field of view (cm) | 34.0 | 34.0 | 30.0 | 22.0 | 34.0 | 35.0 |
| Matrix (phase × frequency) | 320 × 224 | 320 × 256 | 320 × 256 | 320 × 256 | 128 × 128 | 350 × 350 |
| Slice thickness (mm) | 3 | 5 | 4 | 3 | 5 | 1 |
| Slice gap | 0 | 1 | 0.4 | 0 | 1 | 0 |
| b value (s/mm2) | – | – | – | – | 0, 800 | – |
T1WI, T1-weighted imaging; T2WI, T2-weighted imaging; FS, fat suppression; FSE, fast-recovery fast spin echo; DWI, diffusion-weighted imaging; SS-EPI, single-shot echo-planar imaging; LAVA-Flex, liver acquisition with volume acceleration-flexible; GRE, gradient echo; TR, repetition time; TE, echo time
*ADC maps were calculated voxel by voxel with the monoexponential model using formula: where S800 and S0 are the signal intensities with and without a diffusion gradient, respectively