A finite element model for performing intravascular ultrasound elastography of human atherosclerotic coronary arteries

Ultrasound in Medicine & Biology
Radj A BaldewsingA F W van der Steen

Abstract

Intravascular ultrasound (US) elastography measures in an artery the arterial radial strain and displays it in an elastogram. An elastogram adds diagnostic information, such as the proneness of a plaque to rupture and its material composition. However, radial strain depends upon the material properties of an artery, including geometry and used catheter position. Therefore, there is not always a one-to-one correspondence between radial strain and rupture-proneness or material composition. Both the dependence and the correspondence can be quantified after a proper finite element model (FEM) is available. Therefore, this paper proposes a FEM and shows that it can model the arterial strain behavior. Its modelling capability was evaluated by comparing simulated with measured elastograms. Measured elastograms were processed from radiofrequency (RF) data obtained in vitro from six objects: a vessel-mimicking phantom and five excised human atherosclerotic coronary arteries. A FEM was created for each object and used to simulate an elastogram; the material properties and geometry of the FEM were obtained from the histology of the object. Comparison was performed upon high strain regions (HStR), because these regions have proven to conta...Continue Reading

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Citations

Mar 13, 2014·Ultrasound in Medicine & Biology·Renate W BoekhovenRichard G P Lopata
May 3, 2011·Journal of Biomedical Optics·Cuiru SunVictor X D Yang
Nov 1, 2011·Physics in Medicine and Biology·M S Richards, M M Doyley
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Aug 13, 2008·IEEE Transactions on Information Technology in Biomedicine : a Publication of the IEEE Engineering in Medicine and Biology Society·Radjkumarsing A BaldewsingAntonius F W van der Steen
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