評估乳房密度對數位乳房攝影之輻射劑量的相關性

Assessing the Correlation between Breast Density and Radiation Doses in Digital Mammography

孔繁芸(Fan-Yun Kung) ； 彭惠玲(Hui-Ling Peng) ； 湯韻璇(Yun-Xuan Tang) ； 陳良光(Liang-Kuang Chen) ； 蔡裕豐(Yuh-Feng Tsai)

《北市醫放雜誌》 9卷1期 (2019/12) Pp. 17-26

https://doi.org/10.6663/TPART.201912_9(1).0003

摘要

乳腺癌是台灣婦女癌症死亡之首，透過乳房攝影能夠早期偵測並降低死亡率。因為緻密型乳腺組織為乳腺癌危險因子，美國放射學院提出了乳腺影像報告和數據系統分類系統（Breast Imaging Reporting and Data System, BI-RADS），用於乳房攝影影像的標準化解釋和報告。因乳房攝影屬於X 光游離輻射，加上乳房腺體組織為放射敏感組織，為了確保受檢者在檢查當中接受為合理的劑量，儀器的品管和校正非常重要。現今歐洲聯盟委員會和國際原子能總署（International Atomic Energy Agency, IAEA）使用平均乳腺劑量（mean glandular dose, MGD）評估乳房劑量。本研究目的在於乳腺密度和對於乳腺劑量的影響，收集期間為2018年7月共216位受檢者。再以BI-RADS系統分級為a、b、c、d四組，評估乳腺密度和乳房壓縮厚度對乳腺劑量的影響。研究結果顯示，乳腺密度越高和乳房壓縮厚度越高，乳腺劑量越高。

關鍵字

乳房攝影 ； 乳腺劑量 ； 乳房壓縮厚度

並列摘要

Breast cancer is the leading cause to cancer death of Taiwanese women. Mammography helps the breast cancer earlier and reduces mortality rate. The American College of Radiology propose the Breast Imaging Reporting and Data System (BI-RADS) for standardization and reporting of mammography images. Because mammography is ionizing radiation, and the breast gland tissue are radiation sensitive, to ensure the subjects receive a reasonable radiation dose during the examination, the quality control and calibration of equipment are important. Today, the European Commission and the International Atomic Energy Agency (IAEA) use mean glandular dose (MGD) to assess breast gland dose. The purpose of this study was to determine the density of the breast and its effect on the radiation dose of breast. 206 subjects are recruited in July 2018. Classification by the BI-RADS system as four groups a, b, c, and d is done. To assessing the effect of breast density and breast compression thickness on breast glandular dose. Result of this study shows that higher breast gland density and higher compression breast thickness results in higher mean glandular dose.

並列關鍵字

mammography ； mean glandular dose ； compression breast thickness