Local force model for cardiac dynamics analysis based on CT volumetric image sequences

Jose Gerardo Tamez-Pena; Chang Wen Chen; Kevin J. Parker

doi:10.1117/12.267818

26 February 1997 Local force model for cardiac dynamics analysis based on CT volumetric image sequences

Jose Gerardo Tamez-Pena, Chang Wen Chen, Kevin J. Parker

Proceedings Volume 2962, 25th AIPR Workshop: Emerging Applications of Computer Vision; (1997) https://doi.org/10.1117/12.267818
Event: 25th Annual AIPR Workshop on Emerging Applications of Computer Vision, 1996, Washington, DC, United States

Abstract

In this paper we present a local force model and its integration in a hierarchical analysis of the estimation of the left ventricle motion over a cardiac cycle. The local force model is derived from the dynamics of independent point masses driven by local constant forces over a short time. A force field is assumed to be constant over short periods of time. This force drives independent point masses within a regional patch of the left ventricle surface from one time instant to another. The trajectory that minimizes the energy required to move the point mass from one surface to another is considered as the local displacement vector. This estimated trajectory takes into account surface constraints and previous estimations derived from the volumetric image sequences so that the point masses travel along smooth trajectories resembling the realistic left ventricle surface dynamics. This proposed model is able to recover the point correspondence of the nonrigid motions between consecutive frames when the surfaces and the initial conditions of left ventricle at consecutive time frames are given. The local force model is incorporated in a hierarchical analysis scheme providing us with the complete dynamics of the left ventricle as compared to the local kinematic analysis of previous approaches. Experimental results based on synthetic and real left ventricle CT volumetric images show that the proposed scheme is very promising for cardiac analysis.

Citation Download Citation

Jose Gerardo Tamez-Pena, Chang Wen Chen, and Kevin J. Parker "Local force model for cardiac dynamics analysis based on CT volumetric image sequences", Proc. SPIE 2962, 25th AIPR Workshop: Emerging Applications of Computer Vision, (26 February 1997); https://doi.org/10.1117/12.267818

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KEYWORDS

Motion models

Motion analysis

Data modeling

Computed tomography

Heart

Motion estimation

Error analysis

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