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…

Simultaneous correction of nonuniform attenuation and detector response was implemented
in single-photon-emission computed tomography (SPECT) image reconstruction. A ray-…

The study presents application of methods of ascertaining the three-dimensional distribution
of isotope concentration or density in nuclear medicine, and differs from previous three-…

Objective: The human heart is composed of a helical network of muscle fibers organized to
form sheets that are separated by cleavage planes responsible for the orthotropic mechanical …

[en] This chapter is devoted to the methods of computer assisted tomography for determination
of the three-dimensional distribution of gamma-emitting radionuclides in the human body. …

J Nuci Med 30: 497— 507, 1989 hile single photon emission computed tomogra phy (SPECT)
imaging has become a routine clinical procedure in nuclear medicine, the problem of …

The very nature of nuclear medicine, the visual representation of injected radiopharmaceuticals,
implies imaging of dynamic processes such as the uptake and wash-out of radiotracers …

A method is presented for estimating the geometrical parameters for a cone beam detector
geometry from the coordinates of the centroid of a projected point source sampled over 360. …

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 …

A new ray-driven projector-backprojector which can easily be adapted for hardware
implementation is described and simulated in software. The projector-backprojector discretely …