Effects of x-ray beam equalization on mammographic imaging.
Effects of x-ray beam equalization on mammographic imaging.
复制标题
X 射线束均衡对乳腺 X 线摄影成像的影响。
DOI：
10.1118/1.596502
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发表时间：
1990
期刊：
影响因子：
3.8
通讯作者：
Chan,HP
中科院分区：
文献类型：
--
作者：
Lam,KL;Chan,HP
我们采用了一个充满组织等效液体的弹性储液器作为X射线束过滤器，用于曝光均衡。过滤器被设计为放置在上压缩板和乳房之间。在压缩过程中，它将符合乳房周边区域的形状，并填充上下压缩板之间的空间，从而减少乳房厚区和薄区之间的X射线穿透变化，并压缩乳房图像的动态范围。体模研究的结果表明，在均衡乳腺体模图像的外围区域中，低对比度特征的可见性得到改善。实验测量表明，过滤器减少了散射辐射的周边地区。这一结果得到了Monte Carlo模拟研究的证实。当采用均衡时，辐射对比度，包括射束硬化的影响，也得到改善。
We employed an elastic reservoir filled with tissue‐equivalent fluid as an x‐ray beam filter for exposure equalization. The filter is designed to be placed between the upper compression plate and the breast. During compression, it will conform to the shape of the peripheral region of the breast and fill the space between the upper and lower compression plates, thereby reducing the variation in x‐ray penetration between the thick and thin regions of the breast and compressing the dynamic range of the breast image. Results of a phantom study showed that the visibility of low‐contrast features was improved in the peripheral region of the equalized breast phantom image. Experimental measurements indicated that the filter reduced scattered radiation in the peripheral region. This result was confirmed by a Monte Carlo simulation study. The radiation contrast, with the effect of beam hardening included, was also improved when equalization was employed.