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In vivo visualization of cardiovascular structures is possible using medical images. However, one has to realize that the resulting 3D geometries correspond to in vivo conditions. This entails an internal stress state to be present in the in vivo measured geometry of e.g. a blood vessel due to the presence of the blood pressure. In order to correct for this in vivo stress, this paper presents an inverse method to restore the original zero-pressure geometry of a structure, and to recover the in vivo stress field of the final, loaded structure. The proposed backward displacement method is able to solve the inverse problem iteratively using fixed point iterations, but can be significantly accelerated by a quasi-Newton technique in which a least-squares model is used to approximate the inverse of the Jacobian. The here proposed backward displacement method allows for a straightforward implementation of the algorithm in combination with existing structural solvers, even if the structural solver is a black box, as only an update of the coordinates of the mesh needs to be performed.
@article{M2AN_2013__47_4_1059_0,
author = {Bols, Joris and Degroote, Joris and Trachet, Bram and Verhegghe, Benedict and Segers, Patrick and Vierendeels, Jan},
title = {Inverse modelling of image-based patient-specific blood vessels: zero-pressure geometry and \protect\emph{in vivo }stress incorporation},
journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
pages = {1059--1075},
publisher = {EDP-Sciences},
volume = {47},
number = {4},
year = {2013},
doi = {10.1051/m2an/2012057},
language = {en},
url = {http://geodesic.mathdoc.fr/articles/10.1051/m2an/2012057/}
}
TY - JOUR AU - Bols, Joris AU - Degroote, Joris AU - Trachet, Bram AU - Verhegghe, Benedict AU - Segers, Patrick AU - Vierendeels, Jan TI - Inverse modelling of image-based patient-specific blood vessels: zero-pressure geometry and in vivo stress incorporation JO - ESAIM: Mathematical Modelling and Numerical Analysis PY - 2013 SP - 1059 EP - 1075 VL - 47 IS - 4 PB - EDP-Sciences UR - http://geodesic.mathdoc.fr/articles/10.1051/m2an/2012057/ DO - 10.1051/m2an/2012057 LA - en ID - M2AN_2013__47_4_1059_0 ER -
%0 Journal Article %A Bols, Joris %A Degroote, Joris %A Trachet, Bram %A Verhegghe, Benedict %A Segers, Patrick %A Vierendeels, Jan %T Inverse modelling of image-based patient-specific blood vessels: zero-pressure geometry and in vivo stress incorporation %J ESAIM: Mathematical Modelling and Numerical Analysis %D 2013 %P 1059-1075 %V 47 %N 4 %I EDP-Sciences %U http://geodesic.mathdoc.fr/articles/10.1051/m2an/2012057/ %R 10.1051/m2an/2012057 %G en %F M2AN_2013__47_4_1059_0
Bols, Joris; Degroote, Joris; Trachet, Bram; Verhegghe, Benedict; Segers, Patrick; Vierendeels, Jan. Inverse modelling of image-based patient-specific blood vessels: zero-pressure geometry and in vivo stress incorporation. ESAIM: Mathematical Modelling and Numerical Analysis , Direct and inverse modeling of the cardiovascular and respiratory systems. Numéro spécial, Tome 47 (2013) no. 4, pp. 1059-1075. doi: 10.1051/m2an/2012057
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