Table 2.
Mean intravoxel incoherent motion (IVIM) parameter values (of all measurements)
| Mean values | ||||
|---|---|---|---|---|
| Anatomical region | ADC (10-3 s/mm2) (SD) | D (10-3 s/mm2) (SD) | f (%) (SD) | D*(10-3 s/mm2) (SD) |
| ROI 1. Freehand large ROI inside the mass | 1.26 (0.35) | 1.02 (0.27) | 0.18 (0.07) | 14.6 (7.9) |
| ROI 2. Circular small ROI inside the mass | 1.25 (0.38) | 1.02 (0.3) | 0.17 (0.08) | 14.2 (9.4) |
| ROI 3. Lacrymal gland | 1.5 (0.68) | 1.13 (0.28) | 0.2 (0.08) | 15.4 (7.8) |
| ROI 4. Medial extra-ocular muscle | 1.74 (0.57) | 1.27 (0.21) | 0.21 (0.08) | 11.6 (5.1) |
| ROI 5. Lateral extra-ocular muscle | 1.54 (0.27) | 1.17 (0.21) | 0.2 (0.06) | 9.8 (4.9) |
| ROI 6. Temporal muscle | 1.63 (0.29) | 1.16 (0.13) | 0.23 (0.07) | 14.6 (5.6) |
| ROI 7. Temporal lobe | 0.89 (0.07) | 0.75 (0.04) | 0.13 (0.05) | 20.2 (6.7) |
ADC apparent diffusion coefficient, D ‘true’ diffusion coefficient, D* pseudodiffusion coefficient, f perfusion fraction, SD standard deviation, ROI region of interest