Rotation Effects on the Target-Volume Margin Determination
Qinghui Zhang, Weijun Xiong, M. Chan, Y. Song, C. Burman
TL;DR
This paper introduces an analytical formula that accounts for rotational and translational setup errors to accurately determine the necessary margin between CTV and PTV in radiotherapy planning.
Contribution
The study presents a novel analytical formula that incorporates rotational errors into target-volume margin calculations, improving precision over existing methods.
Findings
The formula effectively corrects for both rotational and translational errors.
Incorporating rotational errors leads to more accurate margin determination.
The method enhances treatment planning accuracy in radiotherapy.
Abstract
Rotational setup errors are usually neglected in most clinical centers. An analytical formula is developed to determine the extra margin between clinical target volume (CTV) and planning target volume (PTV) to account for setup errors. The proposed formula corrects for both translational and rotational setup errors and then incorporated into margin determination for PTV.
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