DocumentCode :
557407
Title :
Iterative reconstruction of CT images with PETSc
Author :
Flores, Liubov ; Vidal, Vicent ; Mayo, Patricia ; Rodenas, Francisco ; Verdú, Gumersindo
Author_Institution :
Polytech. Univ. of Valencia, Valencia, Spain
Volume :
1
fYear :
2011
fDate :
15-17 Oct. 2011
Firstpage :
343
Lastpage :
346
Abstract :
In X-ray computed tomography (CT) the X rays are used to obtain the projection data needed to generate an image of the inside of an object. The image can be generated with different techniques. Algebraic methods are more suitable for the reconstruction of images with high contrast and precision in noisy conditions and from a small number of projections. Their use may be important in portable scanners for their functionality in emergency situations. However, in practice, these methods are not widely used due to the high computational cost of their implementation. In this work we analyze and propose the usage of the PETSc library for the optimal usage of a system in the parallel reconstruction of images. Also, the quality comparison of the images reconstructed with both methods, analytical Filtered Back projection (FBP) and iterative LSQR, has been performed.
Keywords :
computerised tomography; image reconstruction; image resolution; iterative methods; least squares approximations; medical image processing; CT images; PETSc library; X-ray computed tomography; algebraic method; filtered backprojection; image contrast; image precision; iterative LSQR; iterative least square QR; iterative reconstruction; parallel reconstruction; portable scanner; Computational efficiency; Computed tomography; Equations; Image reconstruction; Iterative methods; Libraries; Mathematical model; CT image reconstruction; PETSc library; parallel algorithm;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Biomedical Engineering and Informatics (BMEI), 2011 4th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-9351-7
Type :
conf
DOI :
10.1109/BMEI.2011.6098332
Filename :
6098332
Link To Document :
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