- 期刊
The Evaluation of Radiation Doses Surrounding Organs in Mammography by Optically Simulated Luminescent Dosimeter (OSLD)
光發光劑量計於乳房攝影技術周圍器官輻射劑量評估
摘要
Mammography is the most effective method to screen for breast cancer. Mammography can be used to detect breast micro calcifications or tumors and is currently the most validated breast cancer screening tool. Therefore, it is also necessary to pay attention to the radiation dose received by the subject and surrounding organ dosage issues are the focus of this study. This article uses a flat plate ionization chamber and an Optically Simulated Luminescent Dosimeter (OSLD) as a tool for radiation dose measurement. The radiation dose of mamography is measured by the position of the surface thyroid gland, infrapatellar lymph, parotid gland, eyes and other organ tissues. After measuring the entrance skin exposure (ESE) of the American College of Radiology (ACR) standard prosthesis, the mammographic risk of mammography was evaluated using a conversion factor converted to the mean glandular dose (MGD). The Optically Simulated Luminescent Dosimeter was consistent with the measurement results of the Parallel Plate Chamber. As the experiment, the highest radiation dose on the breast about 1.77 mGy. The doses of the axillary lymph and thyroid surface were the second about 0.33 mGy and 0.14 mGy, while the surface doses of the distant parts of the parotid gland, eyes, etc. were lower about 0.08 mGy and 0.03 mGy; the experimental results were in accordance with the American Radiological Medicine. The average dose in the breast results also met the requirements of the ARC standard that the average dose should be less than 3 mGy. The Optically Simulated Luminescent Dosimeter can accurately evaluate the dose of mammography. Contributions of organs other than the breast to the effective doses were negligible as long as the X-ray beam was adequately collimated and aligned to avoid exposure of other part of the body than the breast.
並列摘要
乳房X光檢查是篩查乳腺癌最有效的方法。乳房攝影可用於檢測乳腺微鈣化或腫瘤，目前是最有效的乳腺癌篩查工具。因此，本研究的重點注意受試者接受的輻射劑量和周圍器官劑量問題。本文使用平板游離腔和光激發光劑量計（OSLD）作為輻射劑量測量的工具。通過表面甲狀腺，髕下淋巴，腮腺，眼睛和其他器官組織的位置來測量乳腺的輻射劑量。美國放射學會（ACR）標準假體的入口皮膚暴露（ESE）之後，使用轉換為平均腺體劑量（MGD）的轉換因子來評估乳房X線照相的乳房X射線攝影風險。光激發光劑量計與平板游離腔的測量結果一致。乳房的最高輻射劑量約為1.77 mGy。腋窩淋巴結和甲狀腺表面的劑量分別約為0.33 mGy和0.14 mGy，而腮腺，眼睛等部位的表面劑量較低，約為0.08 mGy和0.03 mGy。實驗結果符合美國放射學會要求。平均劑量也符合ARC標準的要求，平均劑量應低於3 mGy。光激發光劑量計能準確評估乳腺攝影劑量。只要X射線束被充分對準乳房以避免身體其他部分暴露，乳房以外的器官對有效劑量的貢獻可以忽略不計。