Iterative image-domain ring artifact removal in cone-beam CT.
文献类型：期刊论文
| 作者 | Liang, Xiaokun; Zhang, Zhicheng; Niu, Tianye; Yu, Shaode; Wu, Shibin; Li, Zhicheng; Zhang, Huailing; Xie, Yaoqin |
| 刊名 | PHYSICS IN MEDICINE AND BIOLOGY
 |
| 出版日期 | 2017 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Ring artifacts in cone beam computed tomography (CBCT) images are caused by pixel gain variations using flat-panel detectors, and may lead to structured non-uniformities and deterioration of image quality. The purpose of this study is to propose a method of general ring artifact removal in CBCT images. This method is based on the polar coordinate system, where the ring artifacts manifest as stripe artifacts. Using relative total variation, the CBCT images are first smoothed to generate template images with fewer image details and ring artifacts. By subtracting the template images from the CBCT images, residual images with image details and ring artifacts are generated. As the ring artifact manifests as a stripe artifact in a polar coordinate system, the artifact image can be extracted by mean value from the residual image; the image details are generated by subtracting the artifact image from the residual image. Finally, the image details are compensated to the template image to generate the corrected images. The proposed framework is iterated until the differences in the extracted ringartifacts are minimized. We use a 3D Shepp-Logan phantom, Catphan (c) 504 phantom, uniform acrylic cylinder, and images from a head patient to evaluate the proposed method. In the experiments using simulated data, the spatial uniformity is increased by 1.68 times and the structural similarity index is increased from 87.12% to 95.50% using the proposed method. In the experiment using clinical data, our method shows high efficiency in ring artifact removal while preserving the image structure and detail. The iterative approach we propose for ring artifact removal in cone-beam CT is practical and attractive for CBCT guided radiation therapy. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/11988]  |
| 专题 | 深圳先进技术研究院_医工所 |
| 作者单位 | PHYSICS IN MEDICINE AND BIOLOGY |
| 推荐引用方式 GB/T 7714 | Liang, Xiaokun,Zhang, Zhicheng,Niu, Tianye,et al. Iterative image-domain ring artifact removal in cone-beam CT.[J]. PHYSICS IN MEDICINE AND BIOLOGY,2017. |
| APA | Liang, Xiaokun.,Zhang, Zhicheng.,Niu, Tianye.,Yu, Shaode.,Wu, Shibin.,...&Xie, Yaoqin.(2017).Iterative image-domain ring artifact removal in cone-beam CT..PHYSICS IN MEDICINE AND BIOLOGY. |
| MLA | Liang, Xiaokun,et al."Iterative image-domain ring artifact removal in cone-beam CT.".PHYSICS IN MEDICINE AND BIOLOGY (2017). |
入库方式： OAI收割
来源：深圳先进技术研究院
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