To assess ventricular function in patients who have undergone cardiac transplantation, 247 radionuclide ventriculograms were performed on 94 patients. During the first three days after transplantation, 19% demonstrated left ventricular dysfunction and 41% showed isolated right ventricular dysfunction. In 95 cases, radionuclide ventriculography was performed within 24 hr of myocardial biopsy. A ...

PURPOSE To compare CT and radionuclide imaging of osmotic blood-brain barrier disruption. To develop a quantitative method for imaging osmotic blood-brain barrier disruption and to see if iopamidol could be safely given intravenously in conjunction with blood-brain barrier disruption. METHODS Forty-five blood-brain barrier disruption procedures were imaged with CT and radionuclide scans. The ...

Abstract 47 Sc can be produced from different three neutron induced nuclear reactions as Ti(n,p) Sc, 50 V(n,?) and 46 Ca(n,?) Ca, Ca(? ? ) using the Egyptian Second Research Reactor. The measured cross-sections (?) are 62.12 ± 1.93, 4.51 1.27 69.36 2.01 mb natural targets of TiO 2 , V O 3 CaO respectively. carrier-free Ti(n,p), was purified a composite Alginate–Carboxymethyl cellulose/di-2-ethy...

A new route has been investigated for the production of the Rb(Kr) generator parent radionuclide at low energy cyclotrons. The excitation function of the Kr(d,n)Rb reaction was measured up to 14 MeV using natural Kr gas as target, the activation method and a stacked gas-cell irradiation technique. The saturation yield of Rb over the energy range Ed 5 14 → 6 MeV amounts to 2.86 GBq/μA. A compari...

All soil used anywhere in the world for agriculture contains radionuclides to a greater or lesser extent. Typical soils (IA89a) contain approximately 300 kBq/m3 of 40K to a depth of 20 cm. This radionuclide and others are then taken up by crops and transferred to food, leading to a concentration in food and feed of between 50 and 150 Bq/kg. The ingestion of radionuclides in food is one of the p...

The 1ACFM cascade impactor and the High Volume cascade impactors are the instruments that mainly used to define the activity size distribution of radioactive aerosols in the environmental air. The impactors are instruments designed to collect and separate particulate matter according to its aerodynamic size, determining the penetration of particles in the human lung, as well as the transport an...

Using a first-principles calculation, we have computed the charge density for states near EF that is related to the current density observable in scanning-tunneling-microscopy experiments for surfaces of hexagonal, rhombohedral, and a model stage-l intercalated graphite. In hexagonal and rhombohedral graphite, the tunneling current is predicted to be considerably smaller at surface atomic sites...

It has recently become possible to experimentally measure the effects of all amino-acid point mutations to proteins using deep mutational scanning. These experimental measurements can inform site-specific phylogenetic substitution models of gene evolution in nature. Here we describe software that efficiently performs analyses with such substitution models. This software, phydms, can be used to ...

OBJECTIVE Adenosine, which has been used for a myocardial perfusion scan, shows rapid clearance from blood because of its short half-life of <10 seconds. This simulation study evaluates influences of modes of radionuclide injection on ventricular adenosine concentration when one intravenous injection line is used. METHODS Assuming that radionuclide injection is a unit impulse, time-activity c...