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. 2022 Aug 29;12:974728. doi: 10.3389/fonc.2022.974728

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Copyright © 2022 Kusano, Katoh, Minohara, Fujii, Miyasaka, Takayama, Imura, Kusunoki, Miyakawa, Kamada, Serizawa, Takakusagi, Mizoguchi, Tsuchida and Yoshida

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Relationship between variations in the gastrointestinal gas (ΔG-gas) volume and the variations in the clinical target volume (CTV) coverage (ΔTC_CTV) and homogeneity index (ΔHI). (A) Relationship between ΔG-gas and ΔTC_CTV (V95%); (B) ΔHI. The horizontal axis shows the volume variation in G-gas from the initial plan. The effect of the beam range is considered in ΔG-gas. The vertical axes in (A) and (B) show the variations in TC_CTV and HI from the initial plan, respectively. The smaller the gradient, the smaller the effect of G-gas.