Airway segmentation and analysis is an essential step in the understanding of pulmonary anatomy and early detection of lung diseases. In this paper, we evaluate a newly developed method for segmenting the inner and outer surfaces of the airway tree. This is the first approach reported to validate the segmentation of the double wall surfaces for the entire airway tree including bifurcations. Two...

Twelve cyclists and 12 long distance runners matched for age, height, and weight with two control groups of 12 non-athletes were studied echocardiographically to evaluate cardiac structure and function. Runners weighed 8 kg less than cyclists, but age and height were similar. Peak oxygen uptake per kg body weight was higher in athletes than in the control subjects but was similar in the cyclist...

The changes occurring in the dimensions of the cell wall of jute fibres on treatment with 18% sodium hydroxide solution have been examined by light microscopy. As a result of the treatment, the fibres shrink longitudinally and the cell wall thickness increases, the increase being inversely related to the original thickness. These observations are indicative of the movement of the cell wall fibr...

the other parts of the right ventricular wall. Hence, estimation of the thickness only of the wall of the right ventricular inflow tract may not be accurate enough for diagnosis of early stage right ventricular hypertrophy. But even if this is the case, right ventricular wall thickness in the present study was closely correlated with right ventricular peak systolic pressure which could not be m...

A thorough understanding of the relationship between local hemodynamics and plaque progression has been hindered by an inability to prospectively monitor these factors in vivo in humans. In this study a novel approach for noninvasively reconstructing artery wall thickness and local hemodynamics at the human carotid bifurcation is presented. Three-dimensional (3D) models of the lumen and wall bo...

Simple geometric models of the left ventricle and indirect experimental measurements suggest that the inner myocardial wall contributes the largest fraction to total wall thickening. We measured transmural differences in regional wall thickening directly, using an epicardial M mode echocardiographic transducer (6 mm diameter, 5 MHz) placed on the anterior free wall of the left ventricle. Wall t...

M-mode indices of left ventricular dimension and posterior wall thickness were derived from echocardiograms of children presenting with dilated cardiomyopathy/myocarditis and were related to outcome. Echocardiograms from 16 of 18 children were manually digitized to obtain changes of left ventricular dimension and posterior wall thickness throughout the cardiac cycle. Indices of ventricular func...

introduction: cardiovascular abnormalities have been reported in liver cirrhosis (lc). in these patients, cardiac symptoms and physical signs occur as the liver functions worsen. cirrhosis is associated with hyper dynamic circulation and beta-adrenergic system changes responsible for the cardiovascular abnormalities. the purpose of the present study was to explore the echocardiographic findings...