Optimization-based image reconstruction with artifact reduction in C-arm CBCT.
Optimization-based image reconstruction with artifact reduction in C-arm CBCT.
复制标题
基于优化的图像重建，并减少C-ARM CBCT的伪影。
DOI：
10.1088/0031-9155/61/20/7300
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发表时间：
2016-10-21
影响因子：
3.5
通讯作者：
Pan X
中科院分区：
文献类型：
--
作者：
Xia D;Langan DA;Solomon SB;Zhang Z;Chen B;Lai H;Sidky EY;Pan X
我们研究了一种基于优化的重建，重点是减少图像伪影，从C臂锥形束计算机断层扫描（CBCT）在图像引导介入手术中收集的数据。在该研究中，要重建的图像被公式化为凸优化程序的解决方案，其中加权数据发散最小化受到对图像总变差（TV）的约束;在程序中引入数据导数保真度，专门用于有效地抑制由例如，数据截断; Chambolle-Pock（CP）算法被定制为通过求解该程序来重建图像。与任何其他重建一样，所考虑的基于优化的重建取决于许多参数。我们阐明的参数，说明他们的决心，并证明他们的重建的影响。当应用于从猪和患者受试者收集的数据时，基于优化的重建产生的图像与参考重建相比具有明显减少的伪影，并且它似乎还表现出对成像受试者的明显不同的解剖结构和具有临床意义的扫描条件的高度鲁棒性。在研究中获得的知识和见解可以用于帮助真正的临床应用效用的实际重建的设计。
We investigate an optimization-based reconstruction, with an emphasis on image-artifact reduction, from data collected in C-arm cone-beam computed tomography (CBCT) employed in image-guided interventional procedures. In the study, an image to be reconstructed is formulated as a solution to a convex optimization program in which a weighted data divergence is minimized subject to a constraint on the image total variation (TV); a data-derivative fidelity is introduced in the program specifically for effectively suppressing dominant, low-frequency data artifact caused by, e.g., data truncation; and the Chambolle-Pock (CP) algorithm is tailored to reconstruct an image through solving the program. Like any other reconstructions, the optimization-based reconstruction considered depends upon numerous parameters. We elucidate the parameters, illustrate their determination, and demonstrate their impact on the reconstruction. The optimization-based reconstruction, when applied to data collected from swine and patient subjects, yields images with visibly reduced artifacts in contrast to the reference reconstruction, and it also appears to exhibit a high degree of robustness against distinctively different anatomies of imaged subjects and scanning conditions of clinical significance. Knowledge and insights gained in the study may be exploited for aiding in the design of practical reconstructions of truly clinical-application utility.
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影响因子：
3.5
作者：
Bian J;Yang K;Boone JM;Han X;Sidky EY;Pan X
通讯作者：
Pan X
影响因子：
2.9
作者：
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Rotondo, Antonio
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作者：
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通讯作者：
Pan X
影响因子：
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作者：
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通讯作者：
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