Virtual symmetry reconstruction algorithm for limited-view computed tomography

Yang-ming Zhu; Tian-ge Zhuang; Laigao Michael Chen

doi:10.1117/12.131400

1 November 1992 Virtual symmetry reconstruction algorithm for limited-view computed tomography

Yang-ming Zhu, Tian-ge Zhuang, Laigao Michael Chen

Proceedings Volume 1818, Visual Communications and Image Processing '92; (1992) https://doi.org/10.1117/12.131400
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

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.

Citation Download Citation

Yang-ming Zhu, Tian-ge Zhuang, and Laigao Michael Chen "Virtual symmetry reconstruction algorithm for limited-view computed tomography", Proc. SPIE 1818, Visual Communications and Image Processing '92, (1 November 1992); https://doi.org/10.1117/12.131400

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