Practical and Compact High Ratio Mammography Grid System

众所周知，散射x射线在乳房x线摄影中会显著降低图像对比度。因此，市售的乳房x线摄影设备都采用低比例网格来减少散射和图像对比度的影响。然而，传统的乳房x线摄影网格在控制散射的能力上是有限的，特别是对于厚致密的乳房，并且通过更有效的散射控制可以显著改善图像对比度。这种改进已经在高比率、高初级输电网中得到了证明。然而，这些网格必须通过较大的距离来抑制网格伪影，体积庞大，并且限制了患者的定位灵活性。描述为一个实用和紧凑的高比率，高初级传输乳房x线摄影网格系统。在第一阶段，证明了这种方法的可行性。第二阶段的目标是设计和制造一个高比率、高一次输电网系统；用幻影来评价其性能；并展示其临床应用。拟议的商业应用：所描述和正在开发的发明和技术可直接应用于临床乳房x光检查。每个乳房x光检查单元使用两个网格系统。这项正在开发的技术将优于传统的乳房x线照相术网格，而且在成本上也不相上下。

It is well known that scattered X-rays significantly degrade image contrast in mammography. As a result commercially available mammography units all employ low ratio grids to reduce the effects of scatter and image contrast. However, conventional mammography grids are limited in their ability to control scatter, particularly for thick dense breasts, and marked improvement in image contrast is possible with more efficient scatter control. Such improvements have been demonstrated with high ratio, high primary transmission grids. However, these grids have to move through a large distance to suppress grid artifacts, are bulky, and have limited patient positioning flexibility. Described as a practical and compact high ratio, high primary transmission mammography grid system. In Phase I the feasibility of such an approach was demonstrated. The goals in Phase II are to design and fabricate a high ratio, high primary transmission grid system; to evaluate its performance with phantoms; and to demonstrate its clinical utility. PROPOSED COMMERCIAL APPLICATIONS: The invention and technology described and being developed is directly applicable to clinical mammography. Two grid systems are used on every mammography unit. The technology being developed will be superior to conventional mammography grids and will be comparable in cost.