An Optical Method for the In-Vivo Characterization of the Biomechanical Response of the Right Ventricle

Figures

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  Figure 1. (a) Picture of the DIC setup installed in the surgery room, (b) Schematic picture of the DIC setup.

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  Figure 2. An example of the pattern applied by the surgeons during the surgery using a non-toxic sterile marker.

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  Figure 3. (a) Original image from the heart overlain with displacement vectors and the vector length indicated by the colors. The black rectangle indicates where the average of the vector components, strain rate, principal strains, and tissue velocity were obtained from, and the red line shows the direction and length of the virtual extensometer used for extracting the data for fractional shortening (b) Displacement color heat maps for early systole stage (c) Displacement color heat maps for end diastole stage.

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  Figure 4. The length of the displacement vector and the components of the displacement vector obtained from the DIC analysis and the standard deviation error bars for each point.

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  Figure 5. Average maximum and minimum principal strains obtained from the DIC analysis and the standard deviation error bars for each point.

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  Figure 6. Tissue velocity values calculated from the vector length and interframe time and the standard deviation error bars for each point.

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  Figure 7. Tissue velocity calculated using DIC and the standard deviation error bars for each point.

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  Figure 8. Fractional shortening obtained from the DIC analysis.

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  Figure 9. (a) Strain rate extracted by DIC b) Strain extracted by DIC.

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  Figure 10. Horizontal and longitudinal strains as a function of time obtained by DIC.