Computational burden is a major concern when an iterative algorithm is used to reconstruct
a three-dimensional (3-D) image with attenuation, detector response, and scatter corrections…

This paper is written for physicians and presents basic principles of image reconstruction in
nuclear medicine. Both analytical and iterative methods are discussed without rigorous …

The first time I heard about image reconstruction was twenty years ago I came to the University
of Utah as a post-doctoral fellow in the Department of Radiology. Dr. Grant Gullberg and …

A three-dimensional iterative reconstruction algorithm which incorporates models of the
geometric point response in the projector-backprojector is presented for parallel, fan, and cone …

An important part of the filtered backprojection (FBP) algorithm is the ramp filter. This paper
derives the discrete version of the ramp filter in the Fourier domain and studies the …

Reconstruction artifacts in cone beam tomography are studied for filtered backprojection (Feldkamp)
and iterative EM algorithms. The filtered backprojection algorithm uses a voxel-…

The Compton camera can collect SPECT data with high efficiency due to electronic collimation.
The data acquired from a Compton camera are projections of source activity along cones …

Echo‐planar imaging (EPI) is very sensitive to patient‐induced field inhomogeneity caused
by susceptibility changes between different anatomical regions. This results in geometric and …

A cone-beam algorithm which provides a practical implementation of BD Smith's cone-beam
inversion formula (Opt. Eng., vol. 29, p. 524-34, 1990) is presented. For a cone-beam vertex …

It is proposed that the convergence factor mu in the adaptive filter can be made time-varying
according to the gradient of the performance surface. Computer simulations show that when …