Respiratory motion correction with an improved demons algorithm for PET images

Respiratory motion is a major factor that affects the quality of PET images of the thoracic area. The diaphragm moves about 15–20 mm due to respiratory motion, which substantially degrades the effective spatial resolution of PET. In this paper, a gated acquisition method is used to correct the motio...

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Published inChinese physics C Vol. 36; no. 10; pp. 1025 - 1030
Main Author 高娟 柴培 贠明凯 刘双全 单保慈 魏龙
Format Journal Article
LanguageEnglish
Published 01.10.2012
Subjects
Algorithms
Convergence
Diaphragms
Image quality
Marketing
PET
Positron emission
Tomography
动校正
动画效果
呼吸运动
图像对齐
影响因素
空间分辨率
算法
Online AccessGet full text
ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/36/10/020

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Summary:Respiratory motion is a major factor that affects the quality of PET images of the thoracic area. The diaphragm moves about 15–20 mm due to respiratory motion, which substantially degrades the effective spatial resolution of PET. In this paper, a gated acquisition method is used to correct the motion effects. In this method, an improved demons algorithm is proposed to align the gated images. The experimental results show that the quality of PET images is significantly improved when using our improved method and the proposed method has a faster convergence rate than the original demons algorithm.
Bibliography:motion correction; demons algorithm; discontinuity; PET
11-5641/O4
GAO Juan CHAI Pei YUN Ming-Kai LIU Shuang-Quan SHAN Bao-Ci WEI Long （ 1 Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China ）
Respiratory motion is a major factor that affects the quality of PET images of the thoracic area. The diaphragm moves about 15–20 mm due to respiratory motion, which substantially degrades the effective spatial resolution of PET. In this paper, a gated acquisition method is used to correct the motion effects. In this method, an improved demons algorithm is proposed to align the gated images. The experimental results show that the quality of PET images is significantly improved when using our improved method and the proposed method has a faster convergence rate than the original demons algorithm.
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ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/36/10/020