نتایج جستجو برای: outer hyperechogenic zone

تعداد نتایج: 173169  

1997
Francisco Escolano Miguel Cazorla Domingo Gallardo Ramón Rizo

Deformable Template models are first applied to estimate the wall of coronary arteries in intravascular ultrasound sequences. Two circular templates (inner and outer) are used to localise and track an image zone that contains the atheroma plaque. Moreover robust wall thickness estimations are derived from this analysis.

2002
Marek A. Abramowicz Igor V. Igumenshchev Eliot Quataert Ramesh Narayan

We consider the radial structure of radiatively inefficient hydrodynamic accretion flows around black holes. We show that low-viscosity flows consist of two zones: an outer convection-dominated zone and an inner advection-dominated zone. The transition between these two zones occurs at ∼ 50 Schwarzschild radii. Subject headings: accretion, accretion disks — black hole physics — convection Depar...

Journal: :Investigative ophthalmology & visual science 1985
I Molnar S Poitry M Tsacopoulos N Gilodi P M Leuenberger

A large area of the posterior pole of the retina of the miniature pig was photocoagulated, and 2-3 wk later the PO2 in the preretinal vitreous was mapped with O2-sensitive microelectrodes. In the control retina, the PO2 was highly heterogeneous being much higher close to an artery than opposite an intervascular zone. After photocoagulation, PO2 opposite an intervascular zone was found to be sig...

Journal: :Cerebral cortex 2012
Fernando García-Moreno Navneet A Vasistha Nonata Trevia James A Bourne Zoltán Molnár

Previous studies of macaque and human cortices identified cytoarchitectonically distinct germinal zones; the ventricular zone inner subventricular zone (ISVZ), and outer subventricular zone (OSVZ). To date, the OSVZ has only been described in gyrencephalic brains, separated from the ISVZ by an inner fiber layer and considered a milestone that triggered increased neocortical neurogenesis. Howeve...

Journal: :Microvascular research 2014
Tie Pei Zhu Yu Hua Tong Hai Jing Zhan Jin Ma

This study was conducted to demonstrate a new scan method for retinal vessel structure measurement in a specific region of fundus (zone B) using spectral-domain optical coherence tomography (SD-OCT), and to assess its reliability. One temporal superior retinal vessel pair passing through a concentric ring (zone B), which was defined between half and one disc distance from the optic disc border,...

Journal: :Australian and New Zealand journal of ophthalmology 1983
D H Rapaport S R Robinson J Stone

Cytogenesis in the cat retina was studied using tritiated (3H) thymidine autoradiography and nuclear stains. Three zones of cell division were recognized. In the first zone cell cleavage occurs at the outer limiting membrane. The distribution of these mitotic figures is uniform as early as an embryonic age of 29 days (E29) until E50. At about E50 a "cold spot", made apparent by the absence of m...

2000
Judith Zachariasen Kerry Sieh Frederick W. Taylor Wahyoe S. Hantoro

Coral microatolls from the coast and outer-arc islands of Western Sumatra retain a stratigraphic and morphologic record of relative sea-level change, which is due in large part to vertical tectonic deformation above the Sumatran subduction zone. Low water levels, whose fluctuations produce measurable changes in coral morphology, limit the upward growth of the microatolls. Annual rings, derived ...

Journal: :Alcoholism, clinical and experimental research 1997
Y J Zhao G Y Yang E F Domino

Focal cerebral ischemia was induced in a rat model of middle cerebral artery occlusion. Three groups of adult male Sprague-Dawley rats, given food and water ad libitum, were subjected to 4 hr of middle cerebral artery occlusion. All were given vehicle control and ethanol pretreatments intraperitoneally 1 hr before. Mean ipsilateral brain water content in the control, 2 g/kg ethanol, and 2 g/kg ...

2015
San-Ni Chen Chang-Hao Yang Chung-May Yang

Purpose. To report the efficacy of systemic steroid in treating acute zonal occult outer retinopathy (AZOOR). Methods. Retrospective study of 9 consecutive patients of AZOOR, who received systemic steroid therapy in Changhua Christian Hospital from 2005 to 2013, is presented. The duration of therapy was at least 3 months. Patients were evaluated with best corrected visual acuity (BCVA), optical...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 1993
D N Blaustein R B Simmons M F Burgess C D Derby M Nishikawa K S Olson

A unique probe--biotinylated adenosine-5'-monophosphate (5'AMP-biotin)--was used in transmission electron microscopic (TEM) studies to localize 5'AMP odorant binding sites on the dendrites of olfactory receptor neurons in the aesthetasc sensilla of the spiny lobster, Panulirus argus. This probe is capable of both binding to and exciting 5'AMP-sensitive olfactory receptor neurons, as revealed th...

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