New version of Fourier convolution algorithm in computed tomography technique

Nasser Zayed; Bryan Lawton

doi:10.1117/12.185914

16 September 1994 New version of Fourier convolution algorithm in computed tomography technique

Nasser Zayed, Bryan Lawton

Proceedings Volume 2308, Visual Communications and Image Processing '94; (1994) https://doi.org/10.1117/12.185914
Event: Visual Communications and Image Processing '94, 1994, Chicago, IL, United States

Abstract

A new version of the Fourier Convolution algorithm in Computed Tomography is created by modifying the filter function, considering the phantom as a matrix of square pixels and taking the ray sum width equal to the pixel side. Each ray sum has a number of pixels which are partially covered by the ray sum width. This creates a weighting factor which is the correlation vector between the scanning beams and the phantom pixels. Each pixel is reconstructed more than once in each projection. A comparison of the reconstructed variable between images obtained by using the Shepp and Logan filter and the modified filter is presented. Also, the comparison between the Fourier algorithm and the new version is illustrated to compare the image quality and the running time.

Citation Download Citation

Nasser Zayed and Bryan Lawton "New version of Fourier convolution algorithm in computed tomography technique", Proc. SPIE 2308, Visual Communications and Image Processing '94, (16 September 1994); https://doi.org/10.1117/12.185914

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