Directional View Interpolation for Compensation of Sparse Angular Sampling in Cone-Beam CT
Directional View Interpolation for Compensation of Sparse Angular Sampling in Cone-Beam CT
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DOI：
10.1109/tmi.2008.2011550
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发表时间：
2009-07-01
影响因子：
10.6
通讯作者：
Rose, Georg
中科院分区：
文献类型：
--
作者：
Bertram, Matthias;Wiegert, Jens;Rose, Georg
在平面探测器锥束计算机断层扫描和相关应用中，稀疏角采样经常导致特征条纹伪影。为了克服这个问题，已经建议通过插值来生成附加视图。这种方法的实用性相结合的3-D正弦图数据的角度插值的专用方法进行了研究。为此，提出了一种基于结构张量方法的形状驱动方向插值算法。定量评估表明，该方法明显优于传统的场景基插值方案。此外，图像质量的权衡与使用插值的中间视图进行了系统的评估模拟和临床锥束计算机断层扫描数据集的人的头部。据发现，利用定向插值视图显着减少条纹文物和噪声，在小引入图像模糊的代价。
In flat detector cone-beam computed tomography and related applications, sparse angular sampling frequently leads to characteristic streak artifacts. To overcome this problem, it has been suggested to generate additional views by means of interpolation. The practicality of this approach is investigated in combination with a dedicated method for angular interpolation of 3-D sinogram data. For this purpose, a novel dedicated shape-driven directional interpolation algorithm based on a structure tensor approach is developed. Quantitative evaluation shows that this method clearly outperforms conventional scene-base interpolation schemes. Furthermore, the image quality trade-offs associated with the use of interpolated intermediate views are systematically evaluated for simulated and clinical cone-beam computed tomography data sets of the human head. It is found that utilization of directionally interpolated views significantly reduces streak artifacts and noise, at the expense of small introduce image blur.