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Table 1 Accuracy of the elements of the deformation gradient matrix in the local coordinate system.

From: Analytical method to measure three-dimensional strain patterns in the left ventricle from single slice displacement data

 

shear elements

normal elements

 

F 12

F 13

F 21

F 23

F 31

F 32

F 11 -1

F 22 -1.

F 33 -1

Variation in Magnitude

0.006

0.113

0.320

0.013

0.179

0.068

0.381

0.192

0.152

RMS Error

0.000

0.026

0.107

0.013

0.008

0.002

0.001

0.027

0.026

Relative RMS

3.7%

23.1%

33.5%

98.2%

4.6%

2.3%

0.3%

13.9%

17.1%

  1. The calculation was done on the simulated data for the maximum contraction (See appendix B).