The air gap between bolus and skin affects dose distribution in helical and direct tomotherapy
| العنوان: | The air gap between bolus and skin affects dose distribution in helical and direct tomotherapy |
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| المؤلفون: | Ryohei Sasaki, Keiji Kitatani, Yuya Oki, Ai Nakaoka, Hiroaki Akasaka, Naritoshi Mukumoto, Tomonori Yabuuchi, Naoki Hashimoto, Hiroshi Mayahara, Kazufusa Mizonobe, Kazuyuki Uehara, Kazuma Iwashita, Daisuke Miyawaki, Takeaki Ishihara, Aya Harada |
| المصدر: | Journal of Radiotherapy in Practice. 20:294-299 |
| بيانات النشر: | Cambridge University Press (CUP), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Dose delivery, Reproducibility, Materials science, business.industry, medicine.medical_treatment, Dose distribution, Tomotherapy, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Bolus (medicine), Oncology, 030220 oncology & carcinogenesis, Maximum dose, medicine, Radiology, Nuclear Medicine and imaging, Nuclear medicine, business, Air gap (plumbing) |
| الوصف: | Aim:To modify the final dose delivered to superficial tissues and to modulate dose distribution near irradiated surface, different boluses are used. Air gaps often form under the bolus affecting dose distribution. This study aimed to evaluate the effect of an air gap under the bolus radiation on dose delivery.Materials and methods:To evaluate the impact of the air gap, both helical tomotherapy (HT) and direct tomotherapy (DT) were performed in a simulation study.Results:The maximum dose to bolus in DT plans was bigger than that used in HT plans. The maximum dose delivered to the bolus depended on the air gap size. However, the maximum dose to bolus in all HT plans was within the acceptable value range. Acceptable value was set to up to 107% of the prescription dose. In the simulation performed in this study, the acceptable air gap under bolus was up to 15 mm and below 5 mm in HT and DT plans, respectively.Conclusions:HT technique is a good choice, but DT technique can be also used if the bolus position can be reproduced accurately. Thus, the reproducibility of the bolus position between planning and treatment is very important. |
| تدمد: | 1467-1131 1460-3969 |
| DOI: | 10.1017/s1460396920000333 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::9c7b75ed4f45a0313cb4b1f99cc62532 https://doi.org/10.1017/s1460396920000333 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........9c7b75ed4f45a0313cb4b1f99cc62532 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14671131 14603969 |
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| DOI: | 10.1017/s1460396920000333 |