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2004 Technical Reports

Optimization of 3-D Active Appearance Models Using the Inverse Compositional Approach: Applications to Cardiac MRI Segmentation

Alexander Andreopoulos and John K. Tsotsos

Technical Report CS-2004-08

York University

October 28, 2004

Abstract

We present an efficient algorithm for the fitting of three dimensional (3-D) Active Appearance Models (AAMs) on short axis cardiac MRI, using an extension of the inverse compositional image alignment algorithm that was recently introduced by Matthews and Baker [8]. We demonstrate its applicability for the segmentation of the left ventricle in short axis cardiac MR images. We perform experiments to evaluate the speed and segmentation accuracy of our algorithm on a total of 477 MR images, acquired from 11 patients. We observe a 60 fold increase in fitting speed compared to a brute force Gauss-Newton optimization and a segmentation accuracy which agrees well with an independent standard. We conclude that this is an efficient and robust algorithm for left ventricle segmentation using 3-D Active Appearance Models.

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