1357 Objectives Attenuation correction is required for accurate reconstruction of cardiac
SPECT images, however inclusion of an accurate attenuation map is essential. This work …

Background. Our goal was to evaluate the ability of current commercially available
attenuation compensation (AC) techniques to correct for the effects of attenuation, scatter …

To reliably interpret and perform quantitative analysis, attenuation correction for cardiac
single-photon emission computed tomography (SPECT) is fundamental. Thus, knowledge of …

Basic consideration of SPECT reconstruction using filtered back projection (FBP) ignores the
effects of attenuation and assumes that all detected photons originate from points along the …

There are a number of factors that affect the intensity of the apical region in cardiac SPECT
images, which sometime lead to apparent defects in this region. In some patient studies …

The quantitative and visual interpretation of SPECT myocardial perfusion images is limited
by physical factors such as photon attenuation, Compton scatter, and finite resolution effects …

A penalized weighted least squares (PWLS) reconstruction algorithm is described that
simultaneously estimates activity and attenuation distributions from emission sinogram data …

Methods: Monte Carlo simulationsand real acquisitionof a" mTc cardiac phantom were
performed under comparable conditions. Simulated and acquired data were reconstructed …

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 …

In this work the approach for obtaining the attenuation maps for cardiac SPECT was the
estimation directly from the emission data, without transmission imaging, based on …