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. 2021 Nov 5;11:764946. doi: 10.3389/fonc.2021.764946

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Copyright © 2021 Lu, Fan, Hu, Li, Kuang, Yu and Yang

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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Typical dose–volume histograms for the three plans in locally advanced nasopharyngeal carcinoma (NPC). Dose–volume histograms for planning target volume of 70 Gy (PTV₇₀; red), planning target volume for metastatic lymph nodes (PTV_nd; brown), planning target volume of 59.4 Gy (PTV_59.4; purple), (A) the brainstem (blue), (B) optic nerve (orange), (C) parotid gland (pink), and (D) temporal lobe (green).