Meeting Banner
Abstract #3522

3D Strain Rate Mapping of the Calf Muscle and Correlation of Strain Rate Orientation to Muscle Fiber Direction.

Usha Sinha1, Ali Moghadasi2, Shantanu Sinha3

1Physics, San Diego State University, San Diego, CA, United States; 2University of California at San Diego, San Diego, CA, United States; 3Radiology, University of California at San Diego, San Diego, CA, United States

The objective quantification of regional muscle deformation is a valuable clinical tool to evaluate normal and diseased muscle. 2D Strain and strain rate are kinematic properties that have been used to characterize myocardial and lingual deformation. However, the strain rate is 3 Dal as the tissue deformations are 3 dimensional. 3D strain rate measurement is challenging and requires 4D data acquisition. We report here, 3D strain tensor mapping of the medial gastrocnemius and show that the eigenvector associated with the negative eigenvalue deviates by 8-12o from the muscle fiber direction determined from diffusion tensor imaging.

Abstract PDF Presentation Video

Keywords

ability accompanied accordance acquisition anisotropic anterior approval approximately architecture artifacts attached axis blue body borne brown calf cardiac cast challenges characterize clinical coil comp compression compromised conditions confirming consequently contiguous contraction corrected correlation cosine cosines cross defined deformation deformations degrees despite detailed determined deviated diagonalized diffusion dimension dimensional diseased dynamic eigenvalue eigenvalues eigenvector eigenvectors enable encoded encoding evaluate excitations exert expansion extension feasible feedback fiber filter foot force function gradient gradients impaired incompressibility indicates indicating inset integrity isometric kinematic latter least magnitude mapping matching matrix mechanics medial medical muscle myocardial negative negligible objective occurs orientation orthogonal physics placed positive potentially predominant preliminary pressed pressure projected projection properties quantification radiology rather recruited regional reported represents required rest scanned scanner screen section segment separate series shading skeletal skip slice slices spatial spin strain structural studies subject subjects surface table tags tensor third though tissue tool trans transducer understanding vector velocity views water whole