. Author manuscript; available in PMC: 2014 Mar 1.

Published in final edited form as: Ann Biomed Eng. 2012 Nov 13;41(3):477–487. doi: 10.1007/s10439-012-0689-y

Table 3.

Linear Regression Model Results

Ult. Stress vs. Stiffness

Ult. Stress vs. Echo Intensity

Stiffness vs. Echo Intensity

Correlation

σ_ult = 0.145(stiffness) + 0.277

σ_{ult} = \frac{1}{8.8} (echo - 17.046)

stiffness = \frac{1}{1.2} (echo - 18.470)

R² value

0.984

0.845

0.794

σ_ult = ultimate stress

echo = ultrasound echo intensity

Stiffness = normalized stiffness parameter (slope of linear portion of stress-elongation curve)