A prototypepositroncamerahasbeenconstructedconsistingof two highdensityavalanche chamber (HIDAC) detectors operated in coincidence with a resolving time (2r) of 40 nsec. The detectors are multiwire chambers, with specially constructed lead converters added to improvethe photondetectionefficiencyat 511 keV.ThecurrentHIDACdetectorshavea singles efficiency of @—12%, a sensitive area of 31 x 31 c...

1Student, Department of Basic Sciences, Isfahan Payame Noor University, Isfahan, Iran 2Assistant Professor, Biosensor Research Center and Department of Physiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran 3Professor, Department of Physiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran 4Assistant Professor, Department of Basic Scien...

The general features of the Stanford Plan of Medical Education have been described by Stowe (6). The purpose of this article is to discuss in greater detail how we teach the basic medical sciences during the first 3 years of the B-year curriculum. Most of the material will be factual, but where expressions of opinion intrude they represent my own point of view and not necessarily that of my col...

Acute epididymitis represents a common medical condition in the urological outpatient clinic. Mostly, epididymitis is caused by bacterial ascent through the urogenital tract, with pathogens originating either from sexually transmitted diseases or urinary tract infections. Although conservative antimicrobial therapy is possible in the majority of patients and is usually sufficient to eradicate t...

Background and Purpose—Adenosine 5 -monophosphate-activated protein kinase (AMPK) is an important sensor of energy balance. Stroke-induced AMPK activation is deleterious because both pharmacological inhibition and genetic deletion of AMPK are neuroprotective. Metformin is a known AMPK activator but reduces stroke incidence in clinical populations. We investigated the effect of acute and chronic...

Although it is generally taken for granted that dental education must include both basic science and feature-based knowledge components, little is known about their relative roles in visual interpretation of radiographs. The objectives of this study were twofold. First, we sought to compare the educational efficacy of three learning strategies in diagnostic radiology: one that used basic scient...