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. 2018 Jan 4;15(3):3735–3745. doi: 10.3892/ol.2018.7732

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Copyright: © Li et al.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Figure 4. — Isodose curves of 2PA-VMAT and IMRT plans in central lung cancer in which the target volume does not encompass the mediastinal lymphatic drainage region. (A) Isodose curves of IMRT plan. (B) Isodose curves of SA-VMAT plan. (C) Isodose curves of PA-VMAT plan. (D) Isodose curves of 2PA-VMAT plan. In central lung cancer, when PTV does not encompass the mediastinum, there was no significant difference in PTV coverage between the IMRT and 2PA-VMAT plans. 2PA-VMAT exhibited better spinal cord sparing, and better dose conformity and homogeneity. 2PA, double partial arc; VMAT, volumetric modulated arc therapy; IMRT, intensity-modulated radiation therapy; PA, partial arc; SA, single arc; PTV, planning target volume.