نتایج جستجو برای: airway tree segmentation

تعداد نتایج: 318101  

2009
Siripong Potisuk

This paper describes an alternative formalism for Thai syntax parsing based on a lexicalized tree adjoining grammar (LTAG). We first briefly present some formal background concerning LTAG, which is necessary for an understanding of LTAG and its application to Thai. Specifically, we address several issues regarding difficulties in parsing Thai sentences and how to resolve these issues using LTAG...

2001
Richard Nock

In this paper, we exploit some previous theoretical results about decision tree pruning to derive a color segmentation algorithm which avoids some of the common drawbacks of region merging techniques. The algorithm has both statistical and computational advantages over known approaches. It authorizes the processing of 512 512 images in less than a second on conventional PC computers. Experiment...

K. Kazemi N. Noorizadeh

Background: Accurate brain tissue segmentation from magnetic resonance (MR) images is an important step in analysis of cerebral images. There are software packages which are used for brain segmentation. These packages usually contain a set of skull stripping, intensity non-uniformity (bias) correction and segmentation routines. Thus, assessment of the quality of the segmented gray matter (GM), ...

Journal: :Image Vision Comput. 2010
Cédric Allène Jean-Yves Audibert Michel Couprie Renaud Keriven

Minimum cuts, extremum spanning forests and watersheds have been used as the basis for powerful image segmentation procedures. In this paper, we present some results about the links which exist between these different approaches. Especially, we show that extremum spanning forests are particular cases of watersheds from arbitrary markers and that min-cuts coincide with extremum spanning forests ...

Journal: :CoRR 2015
Xiaodong Zhuang Nikos E. Mastorakis Jieru Chi Hanping Wang

-In this paper, a novel model of 3D elastic mesh is presented for image segmentation. The model is inspired by stress and strain in physical elastic objects, while the repulsive force and elastic force in the model are defined slightly different from the physical force to suit the segmentation problem well. The self-balancing mechanism in the model guarantees the stability of the method in segm...

Journal: :Medical Engineering & Physics 2011

Journal: :American journal of respiratory cell and molecular biology 2000
E M Postlethwait J P Joad D M Hyde E S Schelegle J M Bric A J Weir L F Putney V J Wong L W Velsor C G Plopper

Acute lung injury induced by reactive oxygen gases such as ozone (O(3)) is focal and site-selective. To define patterns of acute epithelial injury along intrapulmonary airways, we developed a new analytic approach incorporating labeling of permeable cells, airway microdissection, and laser scanning confocal microscopy, and applied it to isolated perfused rat lungs where ventilation and breathin...

Journal: :Toxicological sciences : an official journal of the Society of Toxicology 2003
Werner Hofmann Bahman Asgharian

Mucociliary clearance velocities in human and rat bronchial airways were calculated in asymmetric, multiple-path models of the bronchial tree by solving mass transport equations based on the assumption of conservation of mucus volume and normalized to measured tracheal mucus velocities of 5.5 mm/min for humans and 1.9 mm/min for rats. Mucus velocities in single airways of the rat lung exhibited...

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