Abstract
In radiation therapy, positioning patients to ensure the accuracy of the setup of a procedure is a routine and labour-intensive process that substantially determines the efficacy of treatment. In this study, we propose a virtual positioning system that can simulate the positioning process with a visible beam path under the broad view of a life-like patient-positioning platform to obviate problems with excessively narrow view. This system integrates image processing, computer graphics, and virtual reality to encompass a 3D treatment target reconstructed from medical images of different modalities in a virtual scene. An innovative evaluation method is further proposed to verify the efficacy of the system using a full-scale 3D solid anthropometric model, and a treatment target showed an accuracy of 99% in calibration and a mean compatibility of 95% with an actual measurement. The proposed virtual positioning system provides a training and education platform for radiation therapy. The methodology through which the system was developed is also disclosed as a promising approach to improve the efficiency and safety of the position verification process for existing systems.
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Acknowledgements
The authors would like to thank Dir. Ching-Jung Wu for providing the environment in the Department of Radiation Oncology at Cathay General Hospital, Taipei, Taiwan, to allow us to build the virtual models in this study.
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Sung, WH., Jiang, CF., Su, TS. et al. A virtual positioning system for external beam radiotherapy. Virtual Reality 27, 2569–2582 (2023). https://doi.org/10.1007/s10055-023-00833-9
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DOI: https://doi.org/10.1007/s10055-023-00833-9