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

The purpose of this study was to determine the utility of quantitative single photon emission
computed tomography (SPECT) lung perfusion scans and F-18 fluorodeoxyglucose positron …

BACKGROUND Filter Operation The filtering ofSPECT images has been performed at three
different stages of the reconstruction algorithm. Originally, the smoothing filter was combined …

In recent years, many investigators have proposed Gibbs prior models to regularize images
reconstructed from emission computed tomography data. Unfortunately, hyperparameters …

The primary goal of this work has been to develop a processing method for gated cardiac
emission computed tomography (ECT) that simultaneously reconstructs the pixel intensities of …

A long bore fan beam collimator for imaging the head was designed and constructed for a
SPECT system with a rotating scintillation camera. In order to avoid the patient's shoulder …

In this paper, we propose and test a new iterative algorithm to simultaneously estimate the
nonrigid motion vector fields and the emission images for a complete cardiac cycle in gated …

In this article, a new method is introduced for estimating the motion of the heart due to respiration
in gated cardiac SPECT using a rigid‐body model with rotation parametrized by a unit …

METhODS Data SImulation The cardiac data simulation method has been previouslyde
scribed (23), and an overview is presented here. The projections of simulated three-…

Many clinical and research studies in nuclear medicine require quantitation of iodine-123 (123I)
distribution for the determination of kinetics or localization. The objective of this study …