Title :
Effects on spatial resolution of CT image caused by inaccurate angle localization
Author :
Wang, Yun-xiao ; Wang, Xin ; Guo, Xiao-Xin ; Pang, Yun-Jie ; Wang, Zheng-Xuan ; Chai, Sheng
Author_Institution :
Coll. of Comput. Sci. & Technol., Jilin Univ., Changchun, China
Abstract :
This paper discusses the negative effect on spatial resolution of computerized tomography (CT) image caused by the angle localization misalignment. Through the theoretic analysis based on "parallel projection" and "filtered back projection", point spreading function of the CT system with inaccurate angle localization is given, also, the estimate of spatial resolution under such condition is provided. The simulative image which is generated by Mathematica 5.0 agrees well with the estimate data, which has verified that such estimate of spatial resolution with inaccurate angle localization is valuable. The result also is providing theoretic reference for confining the precision of the angle coder in large CT system.
Keywords :
computerised tomography; image resolution; medical image processing; optical transfer function; Mathematica 5.0; angle localization misalignment; computerized tomography image; filtered back projection; inaccurate angle localization; parallel projection; point spreading function; spatial resolution; Computational modeling; Computed tomography; Computer science; Educational institutions; Image generation; Image quality; Image reconstruction; Image sampling; Mechanical variables measurement; Spatial resolution; Computerized tomography (CT); point spreading function (PSF); spatial resolution;
Conference_Titel :
Machine Learning and Cybernetics, 2005. Proceedings of 2005 International Conference on
Conference_Location :
Guangzhou, China
Print_ISBN :
0-7803-9091-1
DOI :
10.1109/ICMLC.2005.1527912
