TABLE 1.
Patients’ characteristics
| Pt. # | Age (year) | Sex | Primary site | Stage | TNM (UICC 8th) | GTV size (cm3) | CTV size (cm3) | PTV size (cm3) | Overlap ratio (%) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 72 | M | Body | BR | T4N0M0 | 12.3 | 94.9 | 173.1 | 10.7 |
| 2 | 59 | F | Body | BR | T4N1M0 | 111.6 | 217.5 | 348.1 | 18.5 |
| 3 | 71 | M | Head | BR | T4N0M0 | 38.1 | 144.3 | 249.2 | 15.2 |
| 4 | 79 | M | Head | UR | T4N0M0 | 13.7 | 101.2 | 198.9 | 12.7 |
| 5 | 57 | M | Body | UR | T4N0M0 | 87.3 | 203.0 | 330.7 | 8.9 |
| 6 | 71 | F | Head | BR | T2N0M0 | 31.3 | 119.1 | 119.1 | 16.7 |
| 8 | 78 | M | Head | BR | T2N0M0 | 5.3 | 104.2 | 190.9 | 6.9 |
| 9 | 78 | M | Body | BR | T4N0M0 | 17.9 | 103.2 | 187.3 | 11.5 |
| 10 | 69 | M | Body | BR | T2N0M0 | 18.2 | 133.7 | 236.2 | 15.2 |
| 11 | 64 | F | Head | BR | T4N0M0 | 28.1 | 91.6 | 184.8 | 15.6 |
| 12 | 62 | F | Head | UR | T4N0M0 | 89.8 | 184.0 | 297.7 | 11.6 |
Note: Patient 7 was excluded from this study because daily CBCT, which was performed with a lower mAs value for the patient's body shape, was not available at the segmentation stage due to extremely poor image quality. Overlap refers to the area where the PTV and PRV overlap. The overlap ratio was calculated as the overlap volume to the PTV volume.
Abbreviations: BR, borderline resectable; CBCT, cone‐beam computed tomography; CTV, clinical target volume; GTV, gross tumor volume; PRV, planning organs at risk volume; PTV, planning target volume; UR, unresectable.