A simple modification of the filtered backprojection algorithm is presented for the
computation of the local statistical noise in emission computed tomography. The technique …

Methods for estimating the regional variance in emission tomography images which arise
from the Poisson nature of the raw data are discussed. The methods are based on the …

The magnitude and texture of statistical noise in images of positron emission computed
tomography are evaluated analytically. A simple approximation method is presented for …

The effects of scatter and attenuation on single photon emission computed tomography
(SPECT) images can be analyzed with the aid of sophisticated Monte Carlo simulation …

Noise properties of emission tomographic reconstructed images are compared using
maximum-likelihood-expectation-maximization (ML-EM) and filtered-backprojection (FBP) …

An iterative procedure to correct for attenuation has been developed for a multidetector,
single-photon emission tomographic scanner. The difference between measured and …

An approximation formula for the variance of positron emission tomography (PET) region-of-
interest (ROI) values has been developed, implemented, and evaluated. This formula does …

Abstract Effects of inaccurate attenuation correction on quantitation in positron emission
computed tomography were investigated by both computer simulation and theoretical …

At present, the choice of bandwidth in emission computed tomography (ECT) reconstruction
is done by subjective means. The authors develop an automated objective selection …

Two distinctly different methods have been used to improve images produced in positron-
emission tomography. The first method is to measure the differential time-of-flight of the …