A novel technique to suppress grid line artifacts.
A novel technique to suppress grid line artifacts.
复制标题
一种抑制网格线伪影的新技术。
DOI：
10.1118/1.2164069
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发表时间：
2006
期刊：
影响因子：
3.8
通讯作者：
Barnes,GaryT
中科院分区：
文献类型：
--
作者：
Gauntt,DavidM;Barnes,GaryT
已经确定，粗条密度，空气-空间网格系统可以比传统的高条密度网格更有效地抑制普通x线摄影和乳房x线摄影中的散射。然而，由于网格需要移动很远的距离来抑制网格线伪影，并且由于它们相应的体积，这种系统从未获得临床认可。我们提出了一种利用带有软启动和软停止的x射线曝光波形来抑制网格线的新技术。波形是通过在曝光过程中改变x射线管电流来实现的。我们推导出x射线曝光输出的时间依赖性需要满足的条件，以抑制网格线伪影，只有适度的网格移动。该技术允许设计紧凑的粗条密度网格系统。实验结果证明了该技术的可行性。
It has been established that coarse strip density, air‐interspace grid systems can suppress scatter in general radiography and in mammography more effectively than conventional high strip density grids. However, such systems have never gained clinical acceptance due to the large distance the grid needs to move to suppress gridline artifacts and due to their corresponding bulk. We present a novel technique for suppressing grid lines using an x‐ray exposure wave form with a soft start and soft stop. The wave form is achieved by varying the x‐ray tube current during the exposure. We derive the conditions that the time dependence of the x‐ray exposure output needs to meet to suppress gridline artifacts with only a modest grid movement. The technique allows for the design of compact coarse strip density grid systems. We present experimental results that demonstrate the feasibility of the technique.