A 3D motion reconstruction method using tagged MRI successfully detected noticeable differences in right ventricular motion variables between normal volunteers and patients with hypertrophy.
A novel 3D motion reconstruction method using tagged MRI can successfully extract motion variables like strains and displacements to differentiate normal right ventricular function from right ventricular hypertrophy.
Right ventricular (RV) dysfunction can serve as an indicator of heart and lung disease and can adversely affect the left ventricle. However, normal RV function must be characterized before abnormal states can be detected. We describe a method for reconstructing the 3D motion of the RV by fitting a deformable model to tag and contour data extracted from multiview tagged magnetic resonance images. The deformable model is a biventricular finite element mesh built directly from segmented contours. Our approach accommodates the geometrically complex RV by using the entire lengths of the tags, localized degrees of freedom, and finite elements for geometric modeling. Also, we outline methods for converting the 3D motion reconstruction results into potentially useful motion variables, such as strains and displacements. The technique was applied to synthetic data, two normal hearts, and two hearts with right ventricular hypertrophy (RVH). Noticeable differences were found between the motion variables calculated for normal volunteers and RVH patients.
Haber et al. (Fri,) conducted a other in Right ventricular hypertrophy (n=4). 3D motion reconstruction using tagged MRI vs. Normal volunteers was evaluated on Motion variables (strains and displacements). A 3D motion reconstruction method using tagged MRI successfully detected noticeable differences in right ventricular motion variables between normal volunteers and patients with hypertrophy.
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