摘要
本文具体介绍了一种Feldkamp-type感兴趣区域锥束CT重建方法。首先,我们分析了算法的特点;继而利用锥束扫描模式存在的对称性的反投影优化性质进行算法优化;最后,通过Shepp-Logan数值模拟实验显示优化方法可有效提高图像重建的速度且几乎不影响图像质量。
The paper specifically describes a Feldkamp-type algorithm for the reconstruction of a volume of interest（VOI） from cone-beam（CB） projections. First,we analyze the traits of the reconstruction algorithm,and at the same time,proposes the optimization method by use of symmetry properties in the mode of cone beam scan. Finally,our proposed algorithm is tested using the three-dimensional Shepp–Logan phantom. The experimental results show that the optimization method can efficiently accelerate the speed of image reconstruction and doesn’t affect image quality.
出处
《CT理论与应用研究（中英文）》
2011年第1期55-61,共7页
Computerized Tomography Theory and Applications
基金
国家自然科学基金(60532080
60772102)
关键词
螺旋锥形束CT
FDK算法
感兴趣区域
图像重建
helical cone-beam CT
Feldkamp-type algorithm
volume of interest （VOI）
image reconstruction
