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. 2022 Jun 24;24(2):279. doi: 10.3892/ol.2022.13399

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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. — CT (axial view) indicated bilateral lung metastasis and tumor size reduction after low-dose radiotherapy. (A) Prior to radiotherapy (August 2020). (B) Target area of low-dose radiotherapy of the lung (September 2020), Red line, GTV of lung; blue line, CTV (GTV expanding 0.5 cm outwards); green line, planning target volume (CTV expanding 1.5 cm outwards). (C) two months after radiotherapy (December 2020). (D) four months after radiotherapy (February 2021). (E) seven months after radiotherapy (May 2021). (F) 16 months after radiotherapy (February 2022). GTV, gross tumor volume; CTV, clinical target volume.