What question did this study set out to answer?

This research aims to develop a method to better compare target volumes in radiotherapy by considering their spatial distribution.

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May 16, 2026Open Access

A concept of equivalent‐volume concordance coefficient for comparing target volumes in radiotherapy

Key Points

This research aims to develop a method to better compare target volumes in radiotherapy by considering their spatial distribution.
Evaluated concept against Jaccard coefficient (JC) and Dice similarity coefficient (DSC) for volume comparison.
Compared traditional indices using illustrative cases and two sets of volumes delineated at different time points.
Volume sets achieved Jaccard coefficients of 0.929 and 0.963, indicating high agreement in target volume delineation.

Abstract

BACKGROUND: The significant limitation of simple volume analyses for target volumes is that they disregard the spatial distribution of non-overlapping volumes and the surrounding dose gradient. PURPOSE: ). METHODS: was evaluated via the Jaccard coefficient (JC) and dice similarity coefficient (DSC) and was compared against traditional indices in an illustrative case and two sets of volumes delineated at different time points. RESULTS: of two volume sets were 0.929 and 0.963, respectively. CONCLUSIONS: effectively incorporates the spatial location of non-overlapped volumes and key radiotherapy requirements.

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Ou et al. (Fri,) studied this question.

synapsesocial.com/papers/6a080ab3a487c87a6a40ca7d https://doi.org/https://doi.org/10.1002/acm2.70611

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