Definition of GTVs
| GTV | Contoured image | Included volume |
| GTVCT | CT | Volume by manual contouring on CT image |
| GTVAuto | PET | Volume by autocontouring on PET image |
| GTVManual | PET | Volume by manual contouring on PET image |
| GTVCT+Auto | PET/CT | Volume including both GTVCT and GTVAuto |
| GTVCT+Manual | PET/CT | Volume including both GTVCT and GTVManual |
| GTVCT–Auto | PET/CT | Volume including only intersection volume between GTVCT and GTVAuto |
| GTVCT–Manual | PET/CT | Volume including only intersection volume between GTVCT and GTVManual |