BACKGROUND Contrast-enhanced steady state free precession (CE-SSFP) and T2-weighted short tau inversion recovery (T2-STIR) have been clinically validated to estimate myocardium at risk (MaR) by cardiovascular magnetic resonance while using myocardial perfusion single-photon emission computed tomography as reference standard. Myocardial perfusion single-photon emission computed tomography has be...

PURPOSE To improve the quantification of myocardial perfusion by registering the time series of magnetic resonance (MR) images with injection of gadolinium. MATERIALS AND METHODS Eight patients underwent MR scans to perform myocardial perfusion exam. Two short axis views of the left ventricle (LV) were acquired in free breathing. Two masks for performing the spatial registration of the images...

OBJECTIVE To improve image and diagnostic quality in dynamic CT myocardial perfusion imaging (MPI) by using motion compensation and a spatio-temporal filter. METHODS Dynamic CT MPI was performed using a 256-slice multidetector computed tomography scanner (MDCT). Data from two different patients-with and without myocardial perfusion defects-were evaluated to illustrate potential improvements f...

BACKGROUND First-pass myocardial perfusion is often imaged with a tailored hybrid centric interleaved echo-planar-imaging sequence, providing rapid image acquisition with good contrast enhancement. The centric interleaved phase-encode order minimises the effective time-of-echo but it is sensitive to frequency-offsets. This short article aims to show possible artefacts that might originate with ...

Cardiovascular magnetic resonance first-pass perfusion imaging has developed considerably over the past decade. Several studies have shown that this technique is accurate for the detection of myocardial ischemia. In this article we outline the procedure of myocardial perfusion imaging with cardiovascular magnetic resonance as it is performed at our centers, describe the sequences that are curre...

In this paper we present a new approach for quantitative analysis of myocardial perfusion SPECT studies and assessment of myocardium defect regions. Myocardial perfusion SPECT is widely used in the evaluation of post-infarction patients, in order to foretell the patients’ future conditions. Our approach is based on the use of polar maps, a two-dimensional plot of the reconstructed volume from t...

INTRODUCTION: Respiratory motion of the heart represents a major practical problem in myocardial perfusion MRI. Firstly, the tracer kinetic models used for quantifying perfusion require that the myocardium remains stationary throughout the image time series, thus mandating a prior registration of the images. Secondly, modern k-space undersampling techniques, such as k-t BLAST [1] and UNFOLD [2]...

Evaluating the Effect of Injected Dose 99mTc- MIBI on Quantitative Parameters Myocardial Perfusion Imaging

Background Ungated myocardial perfusion is a promising alternative for simplifying CMR protocols [1]. Spatio-temporal total variation (TV) constrained reconstruction with radial undersampling was used in a pilot study [2]. And TV constraints combined with a low-rank constraint have shown improvement in some cases for gated perfusion imaging [3]. However, the temporal total-variation constraint ...

Introduction: Myocardial perfusion imaging is a nuclear medicine imaging method that is used to detect coronary artery diseases. One of the main sources of error in this imaging method is the detection of Compton scattered photons in the photopeak energy window used for data acquisition. This results in the degradation of the image contrast, and therefore decreases the...