Recent advances in SPECT technology including cadmium-zinc-telluride (CZT) semiconductor detector material may pave the way for absolute myocardial blood flow (MBF) measurements by SPECT. The aim of the present study was to compare K1 uptake rate constants as surrogates of absolute MBF and myocardial flow reserve index (MFRi) in humans as assessed with a CZT SPECT camera versus PET. METHODS A...

malmquist productivity index (mpi) is a numeric index that is of great importance in measuring productivity and its changes. in recent years, tools like dea have been utilized for determining mpi. in the present paper, some models are recommended for calculating mpi when there are just ratio data available. then, using dea and dea-r, some models are proposed under the constant returns to scale ...

Although stress gated technetium-99m single-photon emission computed tomographic (SPECT) myocardial perfusion imaging (MPI) is useful in differentiating ischemic from nonischemic cardiomyopathy, its prognostic usefulness in this patient population is not well understood. Consecutive unique patients with suspected coronary artery disease who, for clinical indications, underwent technetium-99m re...

OBJECTIVE The negative predictive value of a normal single-photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) is very high. However, prognostic implication of a normal SPECT MPI in patients with known coronary artery disease (CAD) is not clear. Objective of this study was to evaluate the cardiac event rate in patients with known CAD who had a normal stress SPECT MPI....

Background. Worldwide, coronary artery disease (CAD) is a leading cause of mortality and morbidity remains to be top health priority in many countries. A non-invasive imaging modality for diagnosis CAD such as single photon emission computed tomography-myocardial perfusion (SPECT-MPI) usually requested by cardiologists it displays radiotracer distribution the heart reflecting myocardial perfusi...

BACKGROUND Cadmium-zinc-telluride (CZT) cameras have improved the evaluation of patients with chest pain. However, inferior/inferolateral attenuation artifacts similar to those seen with conventional Anger cameras persist. We added prone acquisitions and CT attenuation correction (CTAC) to the standard supine image acquisition and analyzed the resulting examinations. METHODS AND RESULTS Seven...

OBJECTIVE This study aimed to investigate whether physical inactivity and overweight deteriorate myocardial perfusion and cardiac function in asymptomatic postmenopausal women. METHODS A prospective cross-sectional study design was used. Postmenopausal women recruited in this study were categorized into groups based on activity level and BMI: physically active, normal-weight group (PANw, n = ...

Abstract Myocardial bridging (MB) is a congenital anomaly characterized by intramyocardial coronary course that can cause compression during systole and lead to myocardial ischemia. The improvement in computed tomography (CT) scanner technology has increased the detection of MB coronary–CT (cCT) exam but assessment their functional significance often challenging. Tha stress–rest perfusion imagi...