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目的分析乳腺分型及压迫厚度对数字乳腺X射线摄影平均腺体剂量(AGD)的影响,探讨不同乳腺分型和压迫厚度同AGD之间的关系。方法选择2014年7月至9月在南方医科大学南方医院行乳腺X射线摄影检查患者400例,均为女性,年龄21~72岁,中位年龄46岁。采用美国Hologic Selenia Dimensions全数字化乳腺摄影系统、全自动曝光控制模式下摄影所获得的400例乳腺片,回顾性分析不同的乳腺分型、不同的压迫厚度与AGD的关系。根据美国放射学会(ACR)分型为脂肪型、少量腺体型、多量腺体型、致密型。采用SPSS 20.0统计学软件对不同乳腺分型、不同压迫厚度患者的AGD进行分析,以研究不同乳腺分型、不同压迫厚度及全数字化乳腺X射线摄影AGD的关系。结果乳腺X射线摄影AGD随乳腺厚度增高而增高,随着乳腺密度分型由脂肪型、少量腺体型、多量腺体型到致密型逐步升高,AGD也随之升高。结论乳腺AGD与乳腺的压迫厚度和不同乳腺分型有着密切关系,有利于根据实际条件选择最优化的曝光参数,以最低的辐射剂量获得最优质图像。
Objective To analyze the effects of breast typing and compression thickness on the average glandular dose (AGD) of digital mammography and to explore the relationship between different breast typing and compression thickness and AGD. Methods From July 2014 to September 2014, 400 patients undergoing mammography examination at Nanfang Hospital of Southern Medical University were women, aged 21-72 years, with a median age of 46 years. Using the Hologic Selenia Dimensions Digital Mammography System in the United States, 400 breast implants obtained under full automatic exposure control mode were retrospectively analyzed for the relationship between different breast typing and different compression thickness and AGD. According to the American College of Radiology (ACR) classification of fat type, a small amount of glandular type, large amount of glandular type, dense type. The SPSS 20.0 statistical software was used to analyze AGD in patients with different breast types and different compression thickness to study the relationship between different breast types, different compression thickness and fully digital mammographic AGD. Results The mammographic AGD of mammography increased with the increase of mammary gland thickness. With the density of mammary gland differentiated from fat type, a small amount of gland type, a large amount of gland type to compact type, AGD also increased. Conclusion The relationship between breast AGD and mammary gland compression thickness and different breast typing is closely related to the choice of the optimal exposure parameters according to the actual conditions and the highest quality images with the lowest radiation dose.