- 期刊
利用乳房磁振造影與乳房X光影像評估非均質乳房組織的乳腺劑量值
Evaluation of the Normalized Absorbed Dose for Inhomogeneous Breast Tissue in MRI and Mammography
摘要
The Normalized average glandular dose (DgN) is possible to overestimate or underestimate in the assessment of radiation dose to the breast during mammography. The reason is that the inhomogeneous breast density is ape to the incorrect transfer factor. In the research, the authors compared 3D MRI and X-ray mammography in each patient and calculate the ratio of fibrogland distribution and tissue pattern. In addition, we used multilayer breast images slices to predict the X-ray mammography dosage. The results suggested that the ratio of fibrogland in each of 3 layer MRI images were 25.33%, 37.36%, and 17.61%. 26.77% is in whole layer image slices. As a result, inhomogeneous fibrogland tissue breast is verified. The conversion factors in multilayer MRI slices and whole layer MRI images were 0.2393±0.0388(mGy/mGy) and 0.2307±0.0401(mGy/mGy) by using paired sample analysis of comprise of transfer factors and prediction of breast mammography dosage. It is a significant result between two groups in prediction of mammography dosage (1.2859±0.2933 mGy vs. 1.2395±0.2939 mGy, p=0.000). In conclusion, it is important to consider the inhomogeneous fibrogland distribution for predicting the dosage. In avoid using single one layer whole breast to calculate the normalized overage glandular dose. That could result in underestimate the radiation dose to the breast.
並列摘要
The Normalized average glandular dose (DgN) is possible to overestimate or underestimate in the assessment of radiation dose to the breast during mammography. The reason is that the inhomogeneous breast density is ape to the incorrect transfer factor. In the research, the authors compared 3D MRI and X-ray mammography in each patient and calculate the ratio of fibrogland distribution and tissue pattern. In addition, we used multilayer breast images slices to predict the X-ray mammography dosage. The results suggested that the ratio of fibrogland in each of 3 layer MRI images were 25.33%, 37.36%, and 17.61%. 26.77% is in whole layer image slices. As a result, inhomogeneous fibrogland tissue breast is verified. The conversion factors in multilayer MRI slices and whole layer MRI images were 0.2393±0.0388(mGy/mGy) and 0.2307±0.0401(mGy/mGy) by using paired sample analysis of comprise of transfer factors and prediction of breast mammography dosage. It is a significant result between two groups in prediction of mammography dosage (1.2859±0.2933 mGy vs. 1.2395±0.2939 mGy, p=0.000). In conclusion, it is important to consider the inhomogeneous fibrogland distribution for predicting the dosage. In avoid using single one layer whole breast to calculate the normalized overage glandular dose. That could result in underestimate the radiation dose to the breast.
延伸閱讀
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- Wang, Y. T., Huang, C. S., Lee, H. T., Chang, Y. C., & Liu, H. M. (2008). 以乳房磁振造影指引之細針定位術化驗乳房攝影及乳房超音波無異常之病灶. 中華放射線醫學雜誌, 33(1), 1-7. https://www.airitilibrary.com/Article/Detail?DocID=10188940-200803-33-1-1-7-a
- 林妤穎、蔡惠予、吳宇恩、廖英蘭、黃怡璇（2019）。數位乳房斷層層析攝影劑量之全國性評估。台灣醫學，23(3)，298-309。https://doi.org/10.6320/FJM.201905_23(3).0002
- Shao, C. H., Chuang, K. S., Yeh, Y. H., & Dong, S. L. (2013). 評估接受底片式乳房攝影病患之平均乳腺劑量－年齡之影響. 中山醫學雜誌, 24(1), 29-36. https://www.airitilibrary.com/Article/Detail?DocID=16803108-201306-201403030032-201403030032-29-36
- 孔繁芸、彭惠玲、湯韻璇、陳良光、蔡裕豐（2019）。Assessing the Correlation between Breast Density and Radiation Doses in Digital Mammography。北市醫放雜誌，9(1)，17-26。https://doi.org/10.6663/TPART.201912_9(1).0003