| Abbreviation | Definition |
|---|---|
| IRAD | Interactive Radiology Review Assessment |
| IRAD | Interactive Radiology Review & Assessment |
| ISF | Inverse Square Factor |
| ITDF | Information Technology Digital Forensics |
| ITP | Inverse Treatment Planning |
| ITV | Internal Target Volume |
| IUPESM | International Union for Physical and Engineering Sciences in Medicine |
| KERMA | Kinetic Energy Released per unit MAss |
| LASIK | Laser-Assisted in situ Keratomileusis |
| LCM | Laser Capture Molecular Core |
| LDR | Lethal-Dose Radiation |
| LDR | Low Dose Rate |
| LDR | Low-Dose Radiation |
| LEM | Local Effect Model |
| LGABF | Left Gastric Artery Blood Flow |
| LILAK | Lectin-Induced Lymphokine-Activated Killer |
| LINAC | LINear ACcelerator |
| LLLT | Low Level Therapeutic Laser |
| LogP | Partition Coefficient |
| LSO | Lutetium OxyorthoSilicate |