Metal Artifact Reduction in Computed Tomography Using Nonequispaced Fourier Transform

被引：11
|
作者：
Kratz, Baerbel [1 ]
Buzug, Thorsten M. [1 ]
机构：
[1] Univ Lubeck, IMT, D-23538 Lubeck, Germany
来源：
2009 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-5 | 2009年
关键词：
CT; RECONSTRUCTION;
D O I：
10.1109/NSSMIC.2009.5401974
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Metal objects in the field of view of a computed tomography (CT) scanner cause several artifacts inside the reconstructed image. By reducing the influence of these metallic objects the image quality can be enhanced. We propose a metal artifact reduction (MAR) method based on interpolation using Nonequispaced Fast Fourier Transforms (NFFT). By damping the transformation additional a priori knowledge may be included during the interpolation step. The results are reconstructed with a weighted maximum likelihood expectation maximization algorithm (lambda-MLEM) and finally compared to two common one dimensional polynomial interpolation methods.
引用
收藏
页码：2720 / 2723
页数：4
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