Table 3. ROI definition methods from 25 studies describing delineation of normal parotid parenchyma.
| Study id | ROI definition method |
|---|---|
| 4 | Reader-based circular ROI: Three 7 mm ROIs |
| 5 | Whole-gland ROI |
| 6 | Reader-based circular ROI: One ROI |
| 7 | Selected slice ROI on the largest slice |
| 8 | Whole-gland ROI |
| 9 | Whole-gland ROI |
| 10 | Selected slice ROI on the largest slice |
| 11 | Whole-gland ROI |
| 12 | Selected slice ROI on the largest slice |
| 13 | Reader-based circular ROI: One 9.4 mm ROI on 4 DWI images |
| 14 | Selected slice ROI on 3 contiguous slices |
| 15 | Selected slice ROI on the largest slice |
| 16 | Selected slice ROI on 3 contiguous slices |
| 17 | Whole-gland ROI |
| 18 | Reader-based circular ROI: 3–4, 100–200 pixels ROIs |
| 20 | Whole-gland ROI; Selected slice ROI on the largest slice; Reader-based 3 circular ROI |
| 21 | Selected slice ROI on 3 contiguous slices |
| 23 | Selected slice ROI on 3 contiguous slices |
| 24 | Selected slice ROI on 3 contiguous slices |
| 29 | Selected slice ROI on the largest slice |
| 35 | Whole-gland ROI |
| 37 | Whole-gland ROI |
| 38 | Reader-based circular ROI: 12 concentric round ROIs |
| 39 | Whole-gland ROI |
| 42 | Selected slice ROI on 3 contiguous slices |
ROI, region of interest.