Evaluation of clinically applied treatment beams with respect to bunker shielding parameters for a Cyberknife M6
العنوان: | Evaluation of clinically applied treatment beams with respect to bunker shielding parameters for a Cyberknife M6 |
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المؤلفون: | Werner Volken, D. Henzen, Michael K. Fix, M. Malthaner, Paul-Henry Mackeprang, Peter Manser, Claudia Christina Zanella, Daniel Schmidhalter |
المصدر: | Journal of Applied Clinical Medical Physics Journal of Applied Clinical Medical Physics, 19 (1) Henzen, Dominik; Schmidhalter, Daniel; Zanella, Claudia Christina; Volken, Werner; Mackeprang, Paul-Henry; Malthaner, Marco; Fix, Michael; Manser, Peter (2018). Evaluation of clinically applied treatment beams with respect to bunker shielding parameters for a Cyberknife M6. Journal of applied clinical medical physics, 19(1), pp. 243-249. American Association of Physicists in Medicine 10.1002/acm2.12215 <http://dx.doi.org/10.1002/acm2.12215> |
بيانات النشر: | ETH Zurich, 2018. |
سنة النشر: | 2018 |
مصطلحات موضوعية: | Time Factors, Radiation Protection & Regulations, Computer science, medicine.medical_treatment, 610 Medicine & health, Cyberknife, Radiation protection, SBRT, Radiosurgery, Linear particle accelerator, 030218 nuclear medicine & medical imaging, law.invention, 03 medical and health sciences, 0302 clinical medicine, law, Neoplasms, medicine, Humans, Radiology, Nuclear Medicine and imaging, Instrumentation, Retrospective Studies, Radiation, business.industry, Radiotherapy Planning, Computer-Assisted, Collimator, Radiotherapy Dosage, Radiation therapy, Bunker, 87.55.ne, 030220 oncology & carcinogenesis, Electromagnetic shielding, Particle Accelerators, Radiotherapy, Conformal, business, Nuclear medicine |
الوصف: | Compared to a conventional linear accelerator, the Cyberknife (CK) is a unique system with respect to radiation protection shielding and the variety and number of non-coplanar beams are two key components regarding this aspect. In this work, a framework to assess the direction distribution and modulation factor (MF) of clinically applied treatment beams of a CyberKnife M6 is developed. Database filtering options allow studying the influence of different parameters such as collimator types, treatment sites or different bunker sizes. A distribution of monitor units (MU) is generated by projecting treatment beams onto the walls, floor and ceiling of the CyberKnife bunker. This distribution is found to be highly heterogeneous and depending, among other parameters, on the bunker size. For our bunker design, 10%–13% of the MUs are delivered to the right and left wall, each. The floor receives more than 64% of the applied MUs, while the wall behind the patient's head is not hit by primary treatment beams. Between 0% and 5% of the total MUs are delivered to the wall at the patient's feet. This number highly depends on the treatment site, e.g., for extracranial patients no beams hit that wall. Collimator choice was found to have minor influence on the distribution of MUs. On the other hand, the MF depends on the collimator type as well as on the treatment site. The MFs (delivered MU/prescribed dose) for all treatments, all MLC treatments, cranial and extracranial treatments are 8.3, 6.4, 7.7, and 9.9 MU/cGy, respectively. The developed framework allows assessing and monitoring important parameters regarding radiation protection of a CK-M6 using the actually applied treatment beams. Furthermore, it enables evaluating different clinical and constructional situations using the filtering options. Journal of Applied Clinical Medical Physics, 19 (1) ISSN:1526-9914 |
وصف الملف: | application/application/pdf; application/pdf |
اللغة: | English |
تدمد: | 1526-9914 |
DOI: | 10.3929/ethz-b-000235603 |
URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::610f95a7d668fa9b9254efd630b80e84 |
حقوق: | OPEN |
رقم الأكسشن: | edsair.doi.dedup.....610f95a7d668fa9b9254efd630b80e84 |
قاعدة البيانات: | OpenAIRE |
تدمد: | 15269914 |
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DOI: | 10.3929/ethz-b-000235603 |