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Table 1 RMS tracking errors (in pixels) of estimated displacements compared with known flow fields measured in three Cartesian directions (x, y and z).

From: Deformation analysis of 3D tagged cardiac images using an optical flow method

β Angle

RMSx

RMSy

RMSz

0

0.627

0.634

0.687

15

0.626

0.640

0.705

30

0.626

0.645

0.689

45

0.629

0.646

0.705

60

0.649

0.677

0.832

75

0.631

0.652

0.776

90

0.638

0.654

0.945

  1. Orientation of the third oblique tag plane is controlled by adjusting the angle between the z-axis and the tagging plane (β).