Artefacts and remedies in direct Fourier tomographic reconstruction

2 January 2003

conference paper
Published by Institute of Electrical and Electronics Engineers (IEEE)

p. 1138-1140 vol.2
https://doi.org/10.1109/nssmic.1992.301056

Abstract

In spite of their potential speed advantages, direct Fourier reconstruction methods have been shunned in practice. The reason is artefacts, which could be avoided only by sacrificing most, if not all, of the speed advantage. The authors demonstrate that the artefacts have two distinct sources: imperfect interpolation and cyclic convolution. An improved interpolation (alternatively using linogram sampled data) reduces zeropadding to the level required for suppression of the cyclic convolution effects of the inherent ramp filter.

Keywords

TOMOGRAPHY
INTERPOLATION
CONVOLUTION
IMAGE RECONSTRUCTION
FILTERS
TAIL
IMAGE PROCESSING
LABORATORIES
RECONSTRUCTION ALGORITHMS
IMAGE QUALITY

This publication has 1 reference indexed in Scilit:

Linograms in Image Reconstruction from Projections
IEEE Transactions on Medical Imaging, 1987