Linked Life Data

12085622

Source:http://linkedlifedata.com/resource/pubmed/id/12085622

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
2002-6-27
pubmed:abstractText
A new technique to determine ventricular function is being developed from non-invasive measurements of centerline mitral flow, using color M-mode (CMM) ultrasound. Based on the hypothesis that vortex rings accompanying mitral flow are significant indicators of ventricular filling, we present a technique to determine characteristics of vortex rings created by mitral inflow, including diameter, position and circulation from the CMM derived centerline velocity data. The rings are modeled as vortex filament loops, which induce axial flow. A quasi-Newtonian regression was performed on the velocity data to determine model ring characteristics. Performance of the technique was determined using a synthetic data set with known vortex ring parameters. The algorithm is shown to be insensitive to initial estimates for ring parameters. However, noise in the data can lead to inaccuracy in the derived ring parameters. Further work to increase the accuracy of the regression algorithm and decrease effect of data uncertainty is ongoing.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:issn
0067-8856
pubmed:author
pubmed:issnType
Print
pubmed:volume
38
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
307-11
pubmed:dateRevised
2009-11-11
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Regression analysis for vortex ring characteristics during left ventricular filling.
pubmed:affiliation
Department of Mechanical Engineering, University of Colorado, Boulder 80309-0427, USA.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't