Analysis of left ventricular wall motion based on volumetric deformable models and MRI-SPAMM

✍ Scribed by Jinah Park; Dimitri Metaxas; Leon Axel

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 596 KB
• Volume: 1
• Category: Article
• ISSN: 1361-8415
• DOI: 10.1016/s1361-8415(01)80005-0

✦ Synopsis

We present a new approach for the analysis of the left ventricular shape and motion based on the development of a new class of volumetric deformable models. We estimate the deformation and complex motion of the left ventricle (LV) in terms of a few parameters that are functions and whose values vary locally across the LV. These parameters capture the radial and longitudinal contraction, the axial twisting, and the long-axis deformation. Using Lagrangian dynamics and finite-element theory, we convert these volumetric primitives into dynamic models that deform due to forces exerted by the datapoints. We present experiments where we used magnetic tagging (MRI-SPAMM) to acquire datapoints from the LV during systole. By applying our method to MRI-SPAMM datapoints, we were able to characterize the 3-D shape and motion of the LV both locally and globally, in a clinically useful way. In addition, based on the model parameters we were able to extract quantitative differences between normal and abnormal hearts and visualize them in a way that is useful to physicians.