| RT | Radiotherapy |
| SRS | Stereotactic radiosurgery |
| SABR | Stereotactic ablative body radiotherapy |
| PD-1 | Programmed death 1 |
| NSCLC | Non-small-cell lung cancer |
| BED | Biological effective dose |
| ICI | Immune checkpoints inhibitors |
| SBRT | Stereotactic body radiotherapy |
| CTLA-4 | Cytotoxic T-Lymphocyte Antigen 4. |
| PD-L1 | Programmed death ligand 1 |
| BM | Brain metastases |