دورية أكاديمية
أعرض في EDS

A multinational audit of small field output factors calculated by treatment planning systems used in radiotherapy.

التفاصيل البيبلوغرافية
العنوان: A multinational audit of small field output factors calculated by treatment planning systems used in radiotherapy.
المؤلفون: Lechner W; International Atomic Energy Agency, Vienna, Austria.; Medical University of Vienna, Department of Radiation Oncology, Vienna, Austria.; Christian Doppler Laboratory for Medical Radiation Research for Radiation Oncology, Vienna, Austria., Wesolowska P; International Atomic Energy Agency, Vienna, Austria., Azangwe G; National University of Science and Technology, Bulawayo, Zimbabwe.; International Atomic Energy Agency, Vienna, Austria., Arib M; Centre De Recherche Nucleaire D'alger, Alger Gare, Algeria., Alves VGL; Instituto Nacional De Câncer, Rio De Janeiro, Brazil., Suming L; Chinese Centre for Disease Control and Prevention, Beijing, China., Ekendahl D; National Radiation Protection Institute, Prague, Czech Republic., Bulski W; Maria Sklodowska-Curie Memorial Cancer Centre and Institute of Oncology, Warsaw, Poland., Samper JLA; National Institute of Oncology and Radiobiology, Havana, Cuba., Vinatha SP; Radiation Standards Section, Radiation Safety Systems Division, Bhabha Atomic Research Centre Trombay, Mumbai, India., Siri S; SSDL, Bureau of Radiation and Medical Devices, Department of Medical Science, Nonthaburi, Thailand., Tomsej M; CHU Charleroi, Hopital Andre Vesale, Montigny-le-Tilleul, Belgium., Tenhunen M; Helsinki University Hospital, Cancer Centre, Helsinki, Finland., Povall J; Department of Medical Physics & Engineering, St James's University Hospital, Leeds, United Kingdom., Kry SF; Imaging and Radiation Oncology Core Houston QA Centre, MD Anderson Cancer Centre, Houston, TX, United States., Followill DS; Imaging and Radiation Oncology Core Houston QA Centre, MD Anderson Cancer Centre, Houston, TX, United States., Thwaites DI; Institute of Medical Physics, School of Physics, University of Sydney, Sydney, Australia.; University of Leeds, St James's University Hospital, Leeds, United Kingdom., Georg D; Medical University of Vienna, Department of Radiation Oncology, Vienna, Austria.; Christian Doppler Laboratory for Medical Radiation Research for Radiation Oncology, Vienna, Austria., Izewska J; International Atomic Energy Agency, Vienna, Austria.
المصدر: Physics and imaging in radiation oncology [Phys Imaging Radiat Oncol] 2018 Mar 06; Vol. 5, pp. 58-63. Date of Electronic Publication: 2018 Mar 06 (Print Publication: 2018).
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Elsevier B.V Country of Publication: Netherlands NLM ID: 101704276 Publication Model: eCollection Cited Medium: Internet ISSN: 2405-6316 (Electronic) Linking ISSN: 24056316 NLM ISO Abbreviation: Phys Imaging Radiat Oncol Subsets: PubMed not MEDLINE
أسماء مطبوعة: Original Publication: [Amsterdam] : Elsevier B.V., [2017]-
مستخلص: Background and Purpose: An audit methodology for verifying the implementation of output factors (OFs) of small fields in treatment planning systems (TPSs) used in radiotherapy was developed and tested through a multinational research group and performed on a national level in five different countries.
Materials and Methods: Centres participating in this study were asked to provide OFs calculated by their TPSs for 10 × 10 cm 2 , 6 × 6 cm 2 , 4 × 4 cm 2 , 3 × 3 cm 2 and 2 × 2 cm 2 field sizes using an SSD of 100 cm. The ratio of these calculated OFs to reference OFs was analysed. The action limit was ±3% for the 2 × 2 cm 2 field and ±2% for all other fields.
Results: OFs for more than 200 different beams were collected in total. On average, the OFs for small fields calculated by TPSs were generally larger than measured reference data. These deviations increased with decreasing field size. On a national level, 30% and 31% of the calculated OFs of the 2 × 2 cm 2 field exceeded the action limit of 3% for nominal beam energies of 6 MV and for nominal beam energies higher than 6 MV, respectively.
Conclusion: Modern TPS beam models generally overestimate the OFs for small fields. The verification of calculated small field OFs is a vital step and should be included when commissioning a TPS. The methodology outlined in this study can be used to identify potential discrepancies in clinical beam models.
(© 2018 The Authors.)
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فهرسة مساهمة: Keywords: Dosimetry audit; Small field output factors; Treatment planning system
تواريخ الأحداث: Date Created: 20210118 Latest Revision: 20220420
رمز التحديث: 20221213
مُعرف محوري في PubMed: PMC7807586
DOI: 10.1016/j.phro.2018.02.005
PMID: 33458370
قاعدة البيانات: MEDLINE
الوصف
تدمد:2405-6316
DOI:10.1016/j.phro.2018.02.005