Numerically simulated exposure of children and adults to pulsed gradient fields in MRI.

Purpose: To determine exposure to gradient switching fields of adults and children in a magnetic resonance imaging (MRI) scanner by evaluating internal electric fields within realistic models of adult male, adult female, and child inside transverse and longitudinal gradient coils, and to compare these results with compliance guidelines.

Materials And Methods: Patients inside x-, y-, and z-gradient coils were simulated using anatomically realistic models of adult male, adult female, and child. The induced electric fields were computed for 1 kHz sinusoidal current with a magnitude of 1 A in the gradient coils.

Influence of tissue affinity of angiotensin-converting enzyme inhibitors on left ventricular remodeling after myocardial infarction.

Background: The demonstration of local renin-angiotension systems has raised the question of whether angiotensin-converting enzyme (ACE) inhibitors with different tissue affinities differ with regard to their effects on postinfarction remodeling.

Hypothesis: The study was undertaken to investigate the influence of ACE inhibitors with different tissue affinity on morphology and function of the infarcted left ventricle.

Methods: In all, 52 patients (17 women, 35 men, 38-73 years) with large acute myocardial infarction were randomized to receive either 25-75 mg/day captopril or 10-20 mg/day fosinopril beginning on the Day 7 after infarction.

Changes of the left ventricle after myocardial infarction--estimation with cine magnetic resonance imaging during the first six months.

Background: In recent years, the interest of cardiologists has focused increasingly on the morphologic and functional changes of the left ventricle after myocardial infarction (MI), due to their great prognostic significance for the patient.

Hypothesis: The aim of this study was to evaluate changes in left ventricular morphology and function during the first 6 months following MI.

Methods: In all, 61 patients (17 women, 44 men, age 36-83 years) were examined with cine magnetic resonance imaging (CMRI) 1, 4, and 26 weeks after myocardial infarction.

[Effect of infarct size and site, patency of the infarct vessel and perfusion of vital myocardium on remodeling of the left ventricle--studies with cine-magnetic resonance tomography in the first 6 months following myocardial infarct].

Background: Aim of the study was to evaluate the influence of infarct size and location and patency of the infarction and non-infarction vessels on left ventricular morphology and function in the first 6 months after myocardial infarction.

Methods: 61 patients (17 female, 44 male, 36-83 years) were examined with Cine Magnetic Resonance Imaging (CMRI) 1 and 26 weeks, and with coronary angiography 4 weeks after infarction. 32 patients had anterior, 29 patients posterior myocardial infarction.

Magnetic resonance angiography as a technique for the visualization of hemodialysis shunts.

In order to test the suitability of magnetic resonance angiography for the visualization of Brescia-Cimino hemodialysis shunts, 20 patients (8 women, 12 men, aged 24-69 years) were examined with this technique. The shunt arm was placed in an extremity coil. The time-of-flight method was applied.