글로벌 연구동향
의학물리학
- 2023년 08월호
[Phys Eng Sci Med .] Development of open access tool for automatic use factor calculation using DICOM-RT patient data
이화의대, 울산의대 / 최동혁, 김동욱, 안소현*, 안우상*
- 출처
- Phys Eng Sci Med .
- 등재일
- 2023 Jul 20. doi: 10.1007/s13246-023-01272-1.
- 저널이슈번호
- 내용
Abstract
Our study recalculated the use factor of linear accelerators (LINACs) by using an in-house program based on Digital Imaging and Communications in Medicine radiation therapy (DICOM-RT). We considered the impact of advancements and changes in treatment trends, including modality, technology, and radiation dose, on the use factor, which is one of the shielding parameters. In accordance with the methodology described in the NCRP 151 report, we computed the use factor for four linear accelerators (LINACs) across three hospitals. We analyzed the results based on the treatment techniques and treatment sites for three-dimensional conformal radiation therapy (3D-CRT) and intensity modulated radiation therapy or volumetric modulated arc therapy. Our findings revealed that the use factors obtained at 45° and 90° were 14.8% and 13.5% higher than those of the NCRP 151 report. In treatment rooms with a high 3D-CRT ratio, the use factor at a specific angle differed by up to 14.6% relative to the NCRP 151 report value. Our results showed a large difference in the use factor for specific sites such as the breast and spine, so it is recommended that each institution recalculate the use factor using patient's data.Affiliations
Dong Hyeok Choi # 1 2 3, Dong Wook Kim # 1 2 3, So Hyun Park 4, So Hyun Ahn 5, Woo Sang Ahn 6, Rena Lee 7, Jin Sung Kim 1 2 3
1Department of Medicine, Yonsei University College of Medicine, Seoul, Korea.
2Medical Physics and Biomedical Engineering Lab (MPBEL), Yonsei University College of Medicine, Seoul, South Korea.
3Department of Radiation Oncology, Heavy Ion Therapy Research Institute, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, South Korea.
4Department of Radiation Oncology, Jeju National University Hospital, Jeju University College of Medicine, Jeju, Republic of Korea.
5Ewha Medical Research Institute, School of Medicine, Ewha Womans University, Seoul, Republic of Korea. mpsohyun@gmail.com.
6Department of Radiation Oncology, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Republic of Korea. anidol@ulsan.ac.kr.
7Department of Biomedical Engineering, School of Medicine, Ewha Womans University, Seoul, South Korea.
#Contributed equally.
- 키워드
- DICOM-RT; LINAC; Monitor unit; NCRP 151; Shielding evaluation; Use factor.
- 연구소개
- 방사선 치료 장비를 사용하는 시설에 방사선 차폐를 설계할 때 사용인자를 고려하는 것은 중요하다. 이 연구에서는 각 치료 기법과 치료 부위별로 모니터 유닛 (MU)과 갠트리 각도를 다양한 간격으로 고려하여 사용인자를 평가했다. 이전 연구들은 DICOM-RT 계획 파일을 통해 사용 인자를 획득하였고, 90° 간격으로 재계산하였다. 그러나 우리 연구에서는 각 치료 기법과 치료 부위별로 더 자세한 분석을 위해 10°, 30°, 45°, 90° 간격으로 더 세밀하게 수행하였다. 이 연구 결과, 45°와 90°에서 얻은 사용인자가 NCRP 151 보고서에 제시된 값보다 상당히 높았다(각각 14.8%와 13.5%). 또한, 3D CRT 비율이 높은 치료실에서 특정 각도의 사용인자는 방사선 안전관리 보고서와 최대 14.6%까지 차이가 있었다. 이 연구 결과는 치료 기법에 기반한 사용인자의 현재 동향을 분석하는 데 유용할 수 있다.
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