Date of download: 11/2/2017 Copyright © ASME. All rights reserved. From: Tendon Strain Measurements With Dynamic Ultrasound Images: Evaluation of Digital Image Correlation J Biomech Eng. 2012;134(2):024504-024504-4. doi:10.1115/1.4006116 Figure Legend: Optical tracking results using ImageJ (open squares) and DIC (open circles). There is a strong correlation between values computed using manual (ImageJ) and DIC tracking of optical videos (R2 value of 0.955). Such a strong correlation demonstrates the ability of DIC to track and calculate strain measurements on optical videos of tissues as accurately as manual methods. These findings were similar in the eight tendons that were tracked; correlation shown in Fig. .

Date of download: 11/2/2017 Copyright © ASME. All rights reserved. From: Tendon Strain Measurements With Dynamic Ultrasound Images: Evaluation of Digital Image Correlation J Biomech Eng. 2012;134(2):024504-024504-4. doi:10.1115/1.4006116 Figure Legend: Linear correlation between strain values calculated manually (using ImageJ) and using DIC tracking methods, plotted with a 95% confidence interval. A strong correlation is shown, with mean intercept and slope of the eight tendons of 0.000 and 0.970, respectively.

Date of download: 11/2/2017 Copyright © ASME. All rights reserved. From: Tendon Strain Measurements With Dynamic Ultrasound Images: Evaluation of Digital Image Correlation J Biomech Eng. 2012;134(2):024504-024504-4. doi:10.1115/1.4006116 Figure Legend: DIC tracking results using optical video with markers and ultrasound videos demonstrating correlation (R2 value of 0.803). These findings were similar in all tested tendons. Such strong correlation demonstrates the ability of DIC to track and calculate strain measurements on ultrasound videos (using only tissue texture) as accurately as when using optical marker methods. Linear correlation is shown in Fig. .

Date of download: 11/2/2017 Copyright © ASME. All rights reserved. From: Tendon Strain Measurements With Dynamic Ultrasound Images: Evaluation of Digital Image Correlation J Biomech Eng. 2012;134(2):024504-024504-4. doi:10.1115/1.4006116 Figure Legend: Linear correlation between strain values calculated by DIC tracking of tendons using optical and ultrasound videos, plotted. The mean intercept and slope of the six tendons analyzed were 0.000 and 1.003, respectively.