Table 1.
Imaging-based segmentation list in multi-region radiomics analysis.
| Imaging-based segmentation list | |||
|---|---|---|---|
| GTV | GTV-2 mm | GTV + 5 mm | GTV + 10 mm |
| (GTV + 5 mm)-GTV | (GTV + 10 mm)-GTV | ||
| CTV | CTV-GTV | ||
| PTV | PTV + 5 mm | PTV + 10 mm | PTV + 20 mm |
| PTV-GTV | |||
| (PTV + 5 mm)-PTV | (PTV + 10 mm)-PTV | (PTV + 20 mm)-(PTV + 5 mm) | |
| Lung | Lung-GTV | Lung-PTV | |
| Lung-(GTV + 5 mm) | |||
| Lung-(PTV + 5 mm) | Lung-(PTV + 10 mm) | Lung-(PTV + 20 mm) | |
“ROI-Xmm” indicates the inner tumor region of ROI minus X mm of the outer edge. ROI is the region of interest, which represents the GTV, CTV, PTV, or whole lung in the current study. “ROI + Xmm” indicates the expanded region from the ROI. “(ROI + Xmm)-ROI” indicates the shell region within X mm around the ROI. GTV gross tumor volume, CTV, clinical target volume, PTV planning target volume.