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Papanikolaou, N., Battista, J., Boyer, A., Klein, E. and Sharpe, M. (2004) Tissue Inhomogeneity Corrections for Megavoltage Photon Beams. AAPM Report 85, Task Group No. 65 of the Radiation Therapy Committee of the American Association of Physicists in Medicine, Medical Physics Publishing, Madison.

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• TITLE: Delivered Dose Verification for Lung Cancer Stereotactic Body Radiotherapy Using Cone-Beam CT

  AUTHORS: Yechao Feng, Xi Liu, Xiang Pan, Chang Hu, Ning Zhan, Zongda Zhu, Zhenxiang Deng

  KEYWORDS: Lung Cancer, Stereotactic Body Radiotherapy, Cone Beam CT, Dose Verification

  JOURNAL NAME: Journal of Cancer Therapy, Vol.12 No.7, July 26, 2021

  ABSTRACT: Purpose: Verified the delivered dose distribution of lung cancer Stereotactic Body Radiotherapy (SBRT) using the cone-beam CT images. Methods: Twenty lung cancer patients who underwent SBRT with 100 CBCT images were enrolled in this study. Delivered dose distributions were recalculated on CBCT images with the deformed and non-deformed methods, respectively. The planned and delivered dose distributions were compared using the dose-volume histograms. Results: The delivered target coverage (V100) per patient inside target volume deviated on average were 0.83% ± 0.86% and 1.38% ± 1.40% for Pct vs. Pcbct and Pct vs. Pdcbct, respectively. The Conformity Index (CI) and Gradient Index (GI) showed a good agreement among the plans. For the critical organs, only minor differences were observed between the planned dose and the delivered dose. Conclusions: CBCT images were a useful tool for setup and dose delivery verification for lung cancer patients who underwent SBRT.