introduction: clinical application of encapsulated radioactive brachytherapy sources has a major role in cancer treatment. in the present research, the effects of different tissue densities on the dose distribution of a 103pd brachytherapy source in a spherical phantom of 50 cm radius have been studied. material and methods: as is well known, absorbed dose in tissue depends to its density, but ...

In this paper, we study the recognition complexity of discrete geometric 2gures (rectangles, squares, circles, ellipses) on a retina by diameter-limited and order-restricted perceptrons. We construct a diameter-limited recognition perceptron for the family of rectangles, beginning with local con2gurations, which is di6erent from the one shown by Minsky et al. (Perceptrons: An Introduction to Co...

conclusions the axillary arch variation is very clinically important, because it may entrap and implicate the neurovascular bundle. also it is important for surgeons during operation, so they need to be aware of possible presence of such variations. case presentation during routine dissection, we encountered an aberrant slip of muscle and fascia expanded from latissimus dorsi to pectoralis majo...

INTRODUCTION: The use of parallel imaging for cardiovascular application has become virtually ubiquitous. Substantial progress since the Zurich Parallel Imaging Workshop held in 2004 has led to improved image quality, reduced exam times, and reduced breath-hold duration. Real-time imaging may be used for free-breathing studies and in patients with arrhythmias or heart rate variation. Cardiac MR...

In this note we consider the set of metric spaces which are the limits with respect to Lipschitz distance dL of compact connected C°°-Riemannian manifolds of curvature uniformly bounded above and below. We call this set "bounded curvature closure" (BCC). It is well known that the limit spaces need not be C-Riemannian manifolds [P, Example 1.8]. Hence, the problem arising is to give a geometrica...

INTRODUCTION Breastfeeding promotion is one of the most important strategies against infant mortality and to control child undernourishment. Despite policies and plans to promote and protect breastfeeding in Colombia, its practice is low and its duration is short. OBJECTIVE To propose an ecology framework to interpret and incorporate contextual, interpersonal, and individual factors associate...