{"title":"ct -直线加速器输出稳定性分析","authors":"Tao Wang , Zhen Wang , Lei Xu","doi":"10.1016/j.jrras.2025.101329","DOIUrl":null,"url":null,"abstract":"<div><h3>Purpose</h3><div>The URT-Linac 506C integrates a diagnostic helical CT scanner into a linear accelerator, enabling the use of CT scanning data for radiation therapy planning. This innovative design facilitates online adaptive radiotherapy. This study aims to report the findings of a two-year quality control program assessing the physical stability and reliability of this advanced radiation treatment unit.</div></div><div><h3>Methods</h3><div>Absolute dose, flatness, and symmetry of 6 MV photon beams were analyzed using SPSS 23.0 from October 2022 to June 2024 to evaluate the stability of the dose output of the linear accelerator. The relative dose values are measured weekly for the same nasopharyngeal carcinoma patient, and the pass rates for criteria of 3% and 3 mm are evaluated.</div></div><div><h3>Results</h3><div>The absorbed dose was within 102%. The flatness of the 10 cm × 10 cm field was within 105%, the symmetry was within 102%, the flatness of the 20 cm × 20 cm field was within 103%, and the symmetry was within 102%. The long-term patient dose verification results ranging between 99.6% and 100%.</div></div><div><h3>Conclusion</h3><div>The URT-Linac 506C linear accelerator demonstrates high-dose stability. Routine quality assurance ensures the accuracy and reliability of the equipment, which is crucial for precise treatment delivery.</div></div>","PeriodicalId":16920,"journal":{"name":"Journal of Radiation Research and Applied Sciences","volume":"18 2","pages":"Article 101329"},"PeriodicalIF":3.5000,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Analysis of the CT-linear accelerator output stability\",\"authors\":\"Tao Wang , Zhen Wang , Lei Xu\",\"doi\":\"10.1016/j.jrras.2025.101329\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Purpose</h3><div>The URT-Linac 506C integrates a diagnostic helical CT scanner into a linear accelerator, enabling the use of CT scanning data for radiation therapy planning. This innovative design facilitates online adaptive radiotherapy. This study aims to report the findings of a two-year quality control program assessing the physical stability and reliability of this advanced radiation treatment unit.</div></div><div><h3>Methods</h3><div>Absolute dose, flatness, and symmetry of 6 MV photon beams were analyzed using SPSS 23.0 from October 2022 to June 2024 to evaluate the stability of the dose output of the linear accelerator. The relative dose values are measured weekly for the same nasopharyngeal carcinoma patient, and the pass rates for criteria of 3% and 3 mm are evaluated.</div></div><div><h3>Results</h3><div>The absorbed dose was within 102%. The flatness of the 10 cm × 10 cm field was within 105%, the symmetry was within 102%, the flatness of the 20 cm × 20 cm field was within 103%, and the symmetry was within 102%. The long-term patient dose verification results ranging between 99.6% and 100%.</div></div><div><h3>Conclusion</h3><div>The URT-Linac 506C linear accelerator demonstrates high-dose stability. Routine quality assurance ensures the accuracy and reliability of the equipment, which is crucial for precise treatment delivery.</div></div>\",\"PeriodicalId\":16920,\"journal\":{\"name\":\"Journal of Radiation Research and Applied Sciences\",\"volume\":\"18 2\",\"pages\":\"Article 101329\"},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2025-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Radiation Research and Applied Sciences\",\"FirstCategoryId\":\"103\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S168785072500041X\",\"RegionNum\":4,\"RegionCategory\":\"综合性期刊\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/2/9 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q2\",\"JCRName\":\"MULTIDISCIPLINARY SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Radiation Research and Applied Sciences","FirstCategoryId":"103","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S168785072500041X","RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/2/9 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
引用次数: 0
摘要
ut - linac 506C将诊断螺旋CT扫描仪集成到直线加速器中，使CT扫描数据能够用于放射治疗计划。这种创新的设计促进了在线自适应放疗。本研究旨在报告一项为期两年的质量控制计划的结果，该计划评估了这种先进放射治疗装置的物理稳定性和可靠性。方法采用SPSS 23.0软件对2022年10月至2024年6月6 MV光子束流的绝对剂量、平整度和对称性进行分析，评价直线加速器输出剂量的稳定性。每周测量同一鼻咽癌患者的相对剂量值，并评估3%和3mm标准的通过率。结果吸收剂量在102%以内。10 cm × 10 cm场的平整度在105%以内，对称性在102%以内，20 cm × 20 cm场的平整度在103%以内，对称性在102%以内。长期患者剂量验证结果在99.6%至100%之间。结论ut - linac 506C直线加速器具有高剂量稳定性。常规的质量保证确保了设备的准确性和可靠性，这对于精确的治疗递送至关重要。
Analysis of the CT-linear accelerator output stability
Purpose
The URT-Linac 506C integrates a diagnostic helical CT scanner into a linear accelerator, enabling the use of CT scanning data for radiation therapy planning. This innovative design facilitates online adaptive radiotherapy. This study aims to report the findings of a two-year quality control program assessing the physical stability and reliability of this advanced radiation treatment unit.
Methods
Absolute dose, flatness, and symmetry of 6 MV photon beams were analyzed using SPSS 23.0 from October 2022 to June 2024 to evaluate the stability of the dose output of the linear accelerator. The relative dose values are measured weekly for the same nasopharyngeal carcinoma patient, and the pass rates for criteria of 3% and 3 mm are evaluated.
Results
The absorbed dose was within 102%. The flatness of the 10 cm × 10 cm field was within 105%, the symmetry was within 102%, the flatness of the 20 cm × 20 cm field was within 103%, and the symmetry was within 102%. The long-term patient dose verification results ranging between 99.6% and 100%.
Conclusion
The URT-Linac 506C linear accelerator demonstrates high-dose stability. Routine quality assurance ensures the accuracy and reliability of the equipment, which is crucial for precise treatment delivery.
期刊介绍：
Journal of Radiation Research and Applied Sciences provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and applications of nuclear, radiation and isotopes in biology, medicine, drugs, biochemistry, microbiology, agriculture, entomology, food technology, chemistry, physics, solid states, engineering, environmental and applied sciences.
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