Influence of Attenuation Coefficient and Exit Gap on EPID Measurement in Radiotherapy
Abstract
In order to improve the safety and treatment quality of patients in radiotherapy, it is necessary to verify the dose delivery in radiotherapy. EPID has the advantages of fast acquisition speed, large imaging area, high resolution, good linear response and long-term stability, and has been used in the quality verification of radiotherapy. EPID is used to place under the patient during in vivo dose verification. The distance between the patient and the EPID will affect the pixel value of the EPID. In order to accurately use EPID for radiation therapy dose verification, we used a series of measurement data to model the attenuation coefficient and exit gap of the EPID. The EPID transmission image calculated using the modeling data is compared with the actual measured EPID transmission image to verify the accuracy of the model.
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November 2021
143 pages
ISBN:9781450385886
DOI:10.1145/3503961
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Published: 08 March 2022
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- National Key Research and Development Program of China
- National Key R&D Program of China
- NSAF
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VSIP 2021
VSIP 2021: 2021 3rd International Conference on Video, Signal and Image Processing
November 19 - 21, 2021
Wuhan, China
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