نتایج جستجو برای: echo g
تعداد نتایج: 470649 فیلتر نتایج به سال:
In pulsed-gradient spin-echo NMR, one measures the disof rotational dipolar auto-correlation spectral density via the ‘‘probe’’ of the spin relaxation times, where T1 samples at placement of nuclear spins over the time interval, D, between two gradient pulses, of duration d and amplitude g , positions v0 and 2v0 , while T1r samples at v1 and 2v1 . The purpose of the present Communication is to ...
Left ventricular (LV) mass is a strong predictor of cardiovascular disease (CVD) events; increased LV mass is common among US firefighters and plays a major role in firefighter sudden cardiac death. We aim to identify significant predictors of LV mass among firefighters. Cross-sectional study of 400 career male firefighters selected by an enriched randomization strategy. Weighted analyses were ...
BACKGROUND The inherent ability of ventricular myocardium to increase its force of contraction in response to an increase in contraction frequency is known as the cardiac force-frequency relation (FFR). This relation can be easily obtained in the stress echo lab, where the force is computed as the systolic pressure/end-systolic volume index ratio, and measured for increasing heart rates during ...
Methods. 93 patients suspected for liver iron overload were examined by MRI to evaluate the amount of LIC. All examinations were performed at 1.5 T. Gradient echo (GRE) sequences were acquired according to the protocol published by Gandon et al [1] and the supplementary protocol for higher LIC by Rose et al. [2]. Furthermore, examinations with spin echo (SE) were performed with a protocol propo...
BACKGROUND The aim of our study was to determine the relation of alcohol consumption and cigarette smoking on continuous-measured hepatic fat fraction (HFF) in a population free of cardiovascular disease. We suggested a direct correlation of alcohol consumption with HFF and increased HFF in former smokers compared to current smokers. METHODS Data from 384 subjects (mean age: 56 years, 58% men...
Optical and magnetic properties of SiO2:C nanopowders obtained by chemical and thermal modification of fumed silica were studied by Fourier transform infrared spectroscopy, Raman, continuous wave (CW) electron paramagnetic resonance (EPR), echo-detected EPR and pulsed electron nuclear double resonance (ENDOR) spectroscopy. Two overlapping signals of Lorentzian lineshape were detected in CW EPR ...
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