Imaging dose of megavoltage computed tomography (MVCT) for treatment verification in the tomotherapy of breast cancer
| Autor: | Maria Y. Y. Law, K. W. Cheung, P. M. Wu, H. I. Lam, K. K. Sang, H. F. Choi, W. M. Chan, Y. W. Ho |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
medicine.medical_specialty
Dosimeter business.industry medicine.medical_treatment Treatment verification medicine.disease Tomotherapy Imaging phantom 030218 nuclear medicine & medical imaging Imaging dose 03 medical and health sciences 0302 clinical medicine Breast cancer Oncology 030220 oncology & carcinogenesis Absorbed dose Medicine Radiology Nuclear Medicine and imaging Radiology Megavoltage Computed Tomography business Nuclear medicine |
| Zdroj: | Journal of Radiotherapy in Practice. 17:244-252 |
| ISSN: | 1467-1131 1460-3969 |
| DOI: | 10.1017/s1460396917000590 |
| Popis: | AimThe purpose of this study was to investigate whether significant difference exists on radiation dose delivered to organs at risks in megavoltage computed tomography (MVCT) verification using three predefined scanning modes, namely fine (2 mm), normal (4 mm) and coarse (6 mm). This will provide information for the imaging protocol of tomotherapy for the left breast.Materials and methodsOrgan doses were measured using thermoluminescent dosimeters (TLD-100) placed within a female Rando phantom for MVCT imaging. Kruskal–Wallis test was conducted with pResultsStatistically significant difference existed in organ absorbed dose between different scan mode selections (pConclusionsOptimisation of imaging protocols is of paramount importance to keep the radiation exposure ‘as low as reasonably achievable’. The recommendation of undergoing daily coarse mode for MVCT verification in breast tomotherapy not only mitigates the radiation exposure to normal tissues, but also trims the scan-acquisition time. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|