Table 1
Definition of volumes in radiotherapy.
| Gross tumour volume (GTV) | The gross, palpable, or visible/clinically demonstrable location and extent of the malignant growth |
| Clinical target volume (CTV) | Anatomical concept-defines a tissue volume that contains a GTV and/or subclinical microscopic malignant disease, which has to be eliminated. |
| Planning target volume (PTV) | Geometrical concept-selects appropriate beam sizes and arrangements, while taking into account all the possible geometrical variations and inaccuracies. |
|
|