Local force model for cardiac dynamics analysis from volumetric image sequences

• Published in: Computerized medical imaging and graphics Vol. 27; no. 6; pp. 437 - 446
• Main Authors: Fan, Li, Tamez-Pena, Jose G., Chen, Chang Wen
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Ltd 01.11.2003; Elsevier Science
• Subjects: Animals; Biological and medical sciences; Biomechanical Phenomena; Cardiac images; Cardiac Volume; Dogs; Dynamic analysis; Heart - diagnostic imaging; Image Processing, Computer-Assisted; Medical sciences; Motion estimation; Myocardial Contraction; Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects); Surface modeling; Technology. Biomaterials. Equipments. Material. Instrumentation; Tomography, X-Ray Computed; Ventricular Function, Left; Surface modeling; Cardiac images; Motion estimation; Dynamic analysis; Biomedical engineering
• ISSN: 0895-6111; 1879-0771
• DOI: 10.1016/S0895-6111(03)00037-5

We propose a local force model based on the kinetics of the left ventricle (LV) surfaces to characterize the complex nonrigid motion that the heart undergoes. The left ventricle motion is analyzed in a coarse-to-fine fashion. First, global motion and deformation are analyzed and compensated with hierarchical surface modeling. Then, we propose a physics-based model of local deformation derived from the dynamics of independent point masses driven by local external force. Experimental results show that the ensembles of the estimated point mass trajectories match well with the realistic left ventricle surface dynamics.