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

页码：2720 / 2723

页数：4

共 11 条

[1]

[Anonymous], SPIE S OPT ENG IM RE

[2]

Bertram M, 2004, 2004 2ND IEEE INTERNATIONAL SYMPOSIUM ON BIOMEDICAL IMAGING: MACRO TO NANO, VOLS 1 and 2, P928

[3] REDUCTION OF CT ARTIFACTS CAUSED BY METALLIC IMPLANTS [J].