A dosimetric evaluation of a novel technique using abutted radiation fields for myeloablative total body irradiation
| العنوان: | A dosimetric evaluation of a novel technique using abutted radiation fields for myeloablative total body irradiation |
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| المؤلفون: | Rekha Arya, Abhishek Gulia, Raghul Ramiya Jayabalan, Hari Mohan Agrawal, Thirumal Mani, Nivedita Dhingra, Esha Kaul, Arun Chairmadurai |
| المصدر: | Journal of Radiotherapy in Practice. 21:200-207 |
| بيانات النشر: | Cambridge University Press (CUP), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Novel technique, 03 medical and health sciences, 0302 clinical medicine, Oncology, business.industry, 030220 oncology & carcinogenesis, Medicine, Radiology, Nuclear Medicine and imaging, Radiation, Total body irradiation, business, 030218 nuclear medicine & medical imaging, Biomedical engineering |
| الوصف: | Background:The present study reports myeloablative total body irradiation (TBI) on an isocentrically mounted linac by laying the patient on the floor and management of abutting radiation fields and partial shielding of lungs. Dosimetrical efficacy of this novel technique was evaluated.Materials and methods:In this retrospective study, dosimetrical parameters from TBI plans on whole-body CT scans of 46 patients were analysed. The prescribed dose to TBI was 12 Gy in six fractions delivered over a period of 3 days for myeloablative conditioning. TrueBeam STx platform Linac (Varian Medical Systems Inc., Palo Alto, CA, USA) was used to deliver opposing fields. Radiation fields were abutted to form a single large field using an arithmetic formula at source-to-skin-distance of 210 cm.Results:Discrepancies in dose calculated by treatment planning system were within 1·6% accuracy, and dose profile at the junction of abutting radiation fields was reproduced within 3·0% accuracy. The real treatment time for each patient was ~30 minutes/fraction. Monitor unit was weighted for multiple sub-fields to achieve dose homogeneity within 5·0% throughout the whole body, and the mean dose to lung was ≤10 Gy.Conclusion:Our abutting radiation field technique for myeloablative TBI is feasible in any existing linac bunker. ‘Island-blocking’ is feasible in this technique using multi-leaf collimator. This technique is cost-effective as it does not require any costly equipment than the readily available equipment in any radiotherapy facility. In general, TBI requires laborious planning procedures and spacious linac bunkers; this novel technique has the potential to change previously held notions. |
| تدمد: | 1467-1131 1460-3969 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::094b6c57c8af5110d8920d3b88877445 https://doi.org/10.1017/s1460396920001041 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........094b6c57c8af5110d8920d3b88877445 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14671131 14603969 |
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