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Proceedings Paper

Virtual symmetry reconstruction algorithm for limited-view computed tomography
Author(s): Yang-ming Zhu; Tian-ge Zhuang; Laigao Michael Chen
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Paper Abstract

A Virtual Symmetry Reconstruction (VSR) algorithm for limited-view image reconstruction is proposed here. The algorithm can be applied to such cases where the missing view angle up to (pi) /2 is allowed for some nondestructive evaluation/testing (NDE/NDT) applications. In order to reconstruct the image, we first assume that the reconstructed object is virtually symmetrical about x-axis. The missing (pi) /2 projection data are compensated for by virtue of the proposed formula. An image with the property symmetrical about x-axis is then reconstructed via filtered backprojection algorithm. Similarly, we assume that the reconstructed object is symmetrical about y-axis. Another image with property symmetrical about y-axis is reconstructed. With these two virtually symmetrical images, the desired image reflecting the real object is finally obtained by some sort of operations. Simulations show that VSR is suited to some NDE/NDT applications.

Paper Details

Date Published: 1 November 1992
PDF: 4 pages
Proc. SPIE 1818, Visual Communications and Image Processing '92, (1 November 1992); doi: 10.1117/12.131400
Show Author Affiliations
Yang-ming Zhu, Shanghai Jiao Tong Univ. (China)
Tian-ge Zhuang, Shanghai Jiao Tong Univ. (China)
Laigao Michael Chen, Shanghai Jiao Tong Univ. (China)

Published in SPIE Proceedings Vol. 1818:
Visual Communications and Image Processing '92
Petros Maragos, Editor(s)

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