数字乳腺X线摄影系统成像参数优化研究
闵高瑜1a ，胡益斌1a ，金锡军1a ，李大鹏1b ，李明明2
南京医科大学第一附属医院
Preliminarily Investigation of Optimization of Imaging Parameters in Digital Mammography System
MIN Gao-yu1a , HU Yi-bin1a , JIN Xi-jun1a , LI Da-peng1b , LI Ming-ming2
1. a. Department of Clinical Engineering;
b. Department of Radiology, The First
Affiliated Hospital of Nanjing Medical
University, Nanjing Jiangsu 210029,
China; 2. Jiangsu Institute of Metrology,
Nanjing Jiangsu 210029, China
摘要 目的 本文对数字乳腺X线摄影系统中成像参数的最优化进行初步研究。方法 采用4 cm厚的PMMA乳腺模体，选择不同的靶/滤过组合、管电压和管电流时间乘积，进行手动成像。利用ImageJ软件中的qa-distri插件得到图像信号区域和背景区域的像素均值和标准差，以此计算图像的对比度噪声比。然后根据对比度噪声比和平均腺体剂量两个参数，评估靶/滤过组合、管电压和管电流时间乘积对成像的影响。结果 对于厚度为 4 cm的乳房，使用钼/铑组合，在得到同等质量图像的情况下，受检者吸收的平均腺体剂量比使用钼/钼组合低。结论，在数字乳腺X线摄影系统临床使用过程中，要选择适宜的曝光参数，既能保证图像质量，又能降低受检者的辐射风险。
关键词 ：
数字乳腺X线摄影系统 ,
钼/铑组合 ,
钼/钼组合 ,
对比度噪声比 ,
平均腺体剂量
Abstract ：Objective Optimizing imaging parameters in digital mammography system was preliminarily
investigated in this paper. Methods The 4-cm-thick PMMA (Poly-Methyl-Meth-Acrylate) breast
simulating phantom was used, and two different combinations of anode/filter material and a wide range
of peak tube voltage and tube current-time product were employed for manually imaging. The images
were analyzed by using a set of plug-in applications in the ImageJ software for acquisition of the pixel
mean value and standard deviation measurements so as to calculate contrast noise ratio. Then, the impact
of combination of anode/filter material, peak tube voltage and tube current-time product on images was
assessed by using contrast noise ration and mean glandular dose.
Key words ：
digital mammography system
combination of Mo/Rh
combination of Mo/Mo
contrast to noise ratio
mean glandular dose
收稿日期: 2015-10-15
作者简介 :
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[4]
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