Radiation-Induced Heart Disease (RIHD) Dose Index Calculator
- Radiation-Induced Heart Disease (RIHD) Dose Index: Explanation and Clinical Context
RIHD Dose Index (RIHD-DI) is a predictive measure used to estimate the risk of cardiac complications in patients receiving thoracic radiotherapy.
The index incorporates key dosimetric parameters: Mean Heart Dose, Maximum Heart Dose, and the percentage of heart volume receiving >25 Gy (V25).
This model is based on epidemiological and clinical studies demonstrating a linear relationship between radiation dose to the heart and subsequent risk of ischemic heart disease and heart failure.
Higher RIHD-DI values indicate a higher likelihood of developing radiation-induced cardiac events and can guide clinicians in optimizing radiotherapy plans to minimize cardiac exposure.
Clinical application includes risk stratification, patient counseling, and monitoring strategies for early detection of RIHD.
Reference:
Darby SC, Ewertz M, McGale P, et al. Risk of ischemic heart disease in women after radiotherapy for breast cancer. N Engl J Med. 2013;368:987-998. doi:10.1056/NEJMoa1209825
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