Document Detail


Simple patient-based transmantle pressure and shear estimate from cine phase contrast MRI in cerebral aqueduct.
MedLine Citation:
PMID:  22893365     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
From measurements of the oscillating flux of the cerebro-spinal fluid (CSF) in the aqueduct of Sylvius we elaborate a patient-based methodology for TRansmantle Pressure (TRP) and shear evaluation. High-resolution anatomical MRI first permits a precise three-dimensional anatomical digitalized reconstruction of the Sylviuss aqueduct shape. From this, a very fast approximate numerical flow computation, nevertheless consistent with analytical predictions, is developed. Our approach includes the main contributions of inertial effects coming from the pulsatile flow and curvature effects associated with the aqueduct bending. Integrating the pressure along the aqueduct longitudinal centerline enables the total dynamic hydraulic admittances of the aqueduct to be evaluated, which is the pre-eminent contribution to the CSF pressure difference between the lateral ventricles (LV) and the subarachnoidal spaces (SAS) also called the transmantle pressure. The application of the method to twenty healthy human patients validates the hypothesis of the proposed approach and provides a first database for normal aqueduct CSF flow. Finally, the implications of our results for modeling and evaluating Intra-cranial Cerebral Pressure (ICP) is discussed.
Authors:
G Bardan; F Plouraboue; O Baledent; M Zagzoule
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-08
Journal Detail:
Title:  IEEE transactions on bio-medical engineering     Volume:  -     ISSN:  1558-2531     ISO Abbreviation:  IEEE Trans Biomed Eng     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0012737     Medline TA:  IEEE Trans Biomed Eng     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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