heterogeneity correction
Mathematical adjustments in dose calculations to account for varying tissue densities within the radiation beam path.
Full Definition
Heterogeneity correction refers to computational algorithms used in radiation treatment planning systems to accurately calculate dose distribution when the radiation beam passes through tissues of different densities, such as lung, bone, and soft tissue. These corrections account for the varying radiation absorption and scattering properties of different materials within the patient's anatomy. Modern planning systems use sophisticated algorithms like Monte Carlo or convolution-superposition methods to model these interactions precisely, ensuring that calculated doses accurately reflect the actual dose delivered to the patient.
Usage
Usage note: Essential for accurate dose calculations, particularly in treatments involving lung or bone interfaces.
In Context
- "Heterogeneity corrections significantly improved dose calculation accuracy in the lung treatment plan." — Treatment planning report
- "The planning system applied heterogeneity corrections based on CT density values." — Medical physics documentation