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Development of shielding evaluation and management program for O-ring type linear accelerators

 Dong Hyeok Choi  ;  So Hyun Ahn  ;  Dong Wook Kim  ;  Sang Hyoun Choi  ;  Woo Sang Ahn  ;  Jihun Kim  ;  Jin Sung Kim 
 SCIENTIFIC REPORTS, Vol.14(1) : 10719, 2024-05 
Journal Title
Issue Date
Humans ; Particle Accelerators* / instrumentation ; Radiation Dosage ; Radiation Protection* / instrumentation ; Radiation Protection* / methods ; Radiotherapy, Intensity-Modulated / methods
DICOM-RT ; Halcyon ; Shielding evaluation ; Tomotherapy ; Unity
The shielding parameters can vary depending on the geometrical structure of the linear accelerators (LINAC), treatment techniques, and beam energies. Recently, the introduction of O-ring type linear accelerators is increasing. The objective of this study is to evaluate the shielding parameters of new type of linac using a dedicated program developed by us named ORSE (O-ring type Radiation therapy equipment Shielding Evaluation). The shielding evaluation was conducted for a total of four treatment rooms including Elekta Unity, Varian Halcyon, and Accuray Tomotherapy. The developed program possesses the capability to calculate transmitted dose, maximum treatable patient capacity, and shielding wall thickness based on patient data. The doses were measured for five days using glass dosimeters to compare with the results of program. The IMRT factors and use factors obtained from patient data showed differences of up to 65.0% and 33.8%, respectively, compared to safety management report. The shielding evaluation conducted in each treatment room showed that the transmitted dose at every location was below 1% of the dose limit. The results of program and measurements showed a maximum difference of 0.003 mSv/week in transmitted dose. The ORSE program allows for the shielding evaluation results to the clinical environment of each institution based on patient data. © The Author(s) 2024.
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1. College of Medicine (의과대학) > Dept. of Radiation Oncology (방사선종양학교실) > 1. Journal Papers
Yonsei Authors
Kim, Dong Wook(김동욱) ORCID logo https://orcid.org/0000-0002-5819-9783
Kim, Jihun(김지훈) ORCID logo https://orcid.org/0000-0003-4856-6305
Kim, Jinsung(김진성) ORCID logo https://orcid.org/0000-0003-1415-6471
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