Linearity and shift invariance (LSI) characteristics of magnetic particle imaging (MPI) are important properties for quantitative medical diagnosis applications. The MPI image equations have been theoretically shown to exhibit LSI; however, in practice, the necessary filtering action removes the first harmonic information, which destroys the LSI characteristics. This lost information can be con...

It has been quite some time since a new myocardial perfusion agent for radionuclide imaging was introduced into clinical practice. For more than 30 years, rest and stress myocardial perfusion imaging (MPI), employing first planar and then single photon emission computed tomography (SPECT) technology, have been performed with thallium201, Tc-99m sestamibi and Tc-99m tetrofosmin. MPI with these a...

objective: although coronary artery disease (cad) is the leading cause of death in type 2 diabetic patients, it is frequently asymptomatic. myocardial perfusion imaging (mpi) is reported to show ischemia in a significant number of asymptomatic diabetic patients. we studied the prevalence and severity of myocardial perfusion defects in asymptomatic diabetic patients and its clinical impact. meth...

During the past 2 decades, myocardial perfusion imaging (MPI) has become fully embedded in the practice of clinical cardiology. Single-photon emission computed tomography (SPECT) cameras are readily available in both the hospital and the office setting. The stress protocols for MPI, with either exercise or pharmacologic stress, are well established, straightforward, and easily implemented. And ...

Tremendous growth in medical imaging has prompted a re-focusing on the appropriateness of testing and the rationale for exposure to ionizing radiation for large segments of the adult population at intermediate to high likelihood for coronary artery disease (CAD). Part I of this series addressed the technical or methodological approaches to measuring radiation exposure and laboratory approaches ...

BACKGROUND The relationship between myocardial perfusion imaging (MPI) abnormalities, diabetes mellitus, and glucose control in South African populations is unknown. It was hypothesized that in subjects undergoing MPI for suspected coronary artery disease (CAD), those with diabetes would have more extensive perfusion defects and that diabetes control would influence MPI abnormalities. The aim o...

The study aims to discuss the relationship and difference between myocardial perfusion imaging (MPI) using SPECT and CT coronary angiography (CTCA) for diagnosis of coronary artery disease (CAD). Five hundred and four cases undergoing MPI and CTCA were comparatively analyzed, including fifty six patients undergoing invasive coronary angiography in the same period. Among patients with negative M...

Introduction: First-pass myocardial perfusion imaging (MPI) is now an established tool for the assessment of ischemic heart disease, and the most widely used protocols involve 2D multi-slice acquisition. Three-dimensional (3D) MPI is potentially advantageous due to its contiguous spatial coverage and high SNR [1], and has been recently shown to be more accurate than 2D multi-slice techniques in...

BACKGROUND Right ventricular dysfunction has been observed in uremic patients receiving percutaneous transluminal angioplasty (PTA). This prospective study focuses on the impact of tissue Doppler imaging echocardiographic parameters on assessing right ventricle function in uremic patients post PTA of dysfunctional hemodialysis access. METHODS Sixty uremic patients were divided into two groups...

Introduction: Peripheral Vascular Disease (PVD) is a major cause of morbidity and is associated with Coronary Artery Disease (CAD). We aimed to perform Lower Limb Perfusion Scan (LLPS) in patients referred for Myocardial Perfusion Imaging (MPI) and estimate prevalence of PVD in subgroups with normal and abnormal MPI results. We also compared quantitative indices of LLPS in patients with and wit...