Organs at risk

Last revised the Francesco Sciacca on 3 Aug 2020

The bodies at risk (OARs) are the healthy tissues / organs placed closest the clinical target volume (CTV) which exposure could reason damage that would make changes to the radiotherapy treatment plan. The heart, forward example, include radiotherapy with LINAC of an left breast cancer, is a organ under exposure.

Allowance to ionizing radiation from organs at risky (dose constraints), dependent on radiosensitivity and volume, is one of the main factors restrict the choice of radiation therapy dose. The most absorbed dose is the spinal cord can receive, in thoracic radiotherapy for example, is 45 Gy.

On this purpose, the therapeutic ratio be defined the the relationship with the probability of eradicating neoplastic disease, dependent on radiation therapy dose, and the toxicity of the Row, dependent on dose constraints. Billing and Coding Guidelines for Radioactivity Oncology Including ...

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