The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 2008
Filed:
Oct. 12, 2006
LI Zhang, Beijing, CN;
Hewei Gao, Beijing, CN;
Zhiqiang Chen, Beijing, CN;
Kejun Kang, Beijing, CN;
Jianping Cheng, Beijing, CN;
Yuanjing LI, Beijing, CN;
Yinong Liu, Beijing, CN;
Yuxiang Xing, Beijing, CN;
Ziran Zhao, Beijing, CN;
Yongshun Xiao, Beijing, CN;
Li Zhang, Beijing, CN;
Hewei Gao, Beijing, CN;
Zhiqiang Chen, Beijing, CN;
Kejun Kang, Beijing, CN;
Jianping Cheng, Beijing, CN;
Yuanjing Li, Beijing, CN;
Yinong Liu, Beijing, CN;
Yuxiang Xing, Beijing, CN;
Ziran Zhao, Beijing, CN;
Yongshun Xiao, Beijing, CN;
Tsinghua University, , CN;
Nuctech Company Limited, , CN;
Abstract
It is disclosed a system and a method for reconstructing an image by using a straight-line trajectory scan to avoid image spatial resolution reduction due to interpolations in angular direction and detector direction during data rebinning. This system comprises: a projection data conversion section for converting projection data from straight-line trajectory scan into projection data under quasi-parallel-beam scan; a filtration section for obtaining filtered projection data by convoluting the projection data under quasi-parallel-beam scan with a predetermined convolutional kernel; and a back-projection section for reconstructing an image by back-projecting the filtered projection data with a weighting factor. By using the inventive system and method, the spatial resolution in the reconstructed image is improved, and the influence of data truncation on the reconstructed image is reduced. The present invention applies the filtration and back-projection mode, and thus has general advantages of the filtration and back projection, such as simplicity and efficiency. And it is easy to be parallelized and accelerated.