X-ray scatter correction algorithm for cone beam CT imaging
X-ray scatter correction algorithm for cone beam CT imaging
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DOI：
10.1118/1.1711475
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发表时间：
2004-05-01
期刊：
影响因子：
3.8
通讯作者：
Conover, D
中科院分区：
文献类型：
--
作者：
Ning, R;Tang, XY;Conover, D
开发和优化X射线散射控制和减少技术是锥形束计算机断层扫描（CBCT）的主要挑战之一，因为CBCT对散射的免疫力远低于扇束CT。X射线散射降低了图像对比度，增加了图像噪声，并将重建误差引入CBCT。为了减小散射干扰，在基于平板探测器的CBCT原型扫描仪上开发了一种基于光束阻挡阵列技术和图像序列处理的实用算法。本文提出了一种基于波束停止阵列的散射校正算法，并通过体模研究评估结果。结果表明，基于束流阻挡阵列的散射校正算法是实用和有效的，以减少和校正CBCT成像任务的X射线散射。(C)2004年美国医学物理学家协会。
Developing and optimizing an x-ray scatter control and reduction technique is one of the major challenges for cone beam computed tomography (CBCT) because CBCT will be much less immune to scatter than fan-beam CT. X-ray scatter reduces image contrast, increases image noise and introduces reconstruction error into CBCT. To reduce scatter interference, a practical algorithm that is based upon the beam stop array technique and image sequence processing has been developed on a flat panel detector-based CBCT prototype scanner. This paper presents a beam stop array-based scatter correction algorithm and the evaluation results through phantom studies. The results indicate that the beam stop array-based scatter correction algorithm is practical and effective to reduce and correct x-ray scatter for a CBCT imaging task. (C) 2004 American Association of Physicists in Medicine.