Approaching artery rigid dynamics in IVUS.
Tissue biomechanical properties (like strain and stress) are playing an increasing role in diagnosis and long-term treatment of intravascular coronary diseases. Their assessment strongly relies on estimation of vessel wall deformation. Since intravascular ultrasound (IVUS) sequences allow visualizing vessel morphology and reflect its dynamics, this technique represents a useful tool for evaluation of tissue mechanical properties. Image misalignment introduced by vessel-catheter motion is a major artifact for a proper tracking of tissue deformation. In this work, we focus on compensating and assessing IVUS rigid in-plane motion due to heart beating. Motion parameters are computed by considering both the vessel geometry and its appearance in the image. Continuum mechanics laws serve to introduce a novel score measuring motion reduction in in vivo sequences. Synthetic experiments validate the proposed score as measure of motion parameters accuracy; whereas results in in vivo pullbacks show the reliability of the presented methodologies in clinical cases.
Computer Science Department, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain. aura@cvc.uab.cat
Aura
A
Hernandez-Sabate
Debora
D
Gil
Eduard
E
Fernandez-Nofrerias
Petia
P
Radeva
Enric
E
Marti
D000465:Algorithms; D001158:Arteries / Q000000981:diagnostic imaging / Q000502:physiology; D001696:Biomechanical Phenomena / Q000502:physiology; D004548:Elasticity / Q000502:physiology*; D004562:Electrocardiography; D005583:Fourier Analysis; D006801:Humans; D016014:Linear Models; D019047:Phantoms, Imaging; D011674:Pulse; D018084:Ultrasonography, Interventional / Q000379:methods*