Fig. 6.

Fiber orientation results in the rotation experiment of azimuth angle as described in Fig. 2(c). The data was obtained from right ventricle of Heart IV. The reference OCT image and fiber orientations before rotation is shown in (a). During the rotation, we imaged and processed the image when the rotations are (b) 30° (c) 60° (d) 90°. The measured mean value and standard deviation of azimuth angle and polar angle are computed and displayed on the top of each image. The measured change on polar angle, Δϕ’, was within 5°. The change of azimuth angle, Δθ’, matches the rotation in our experiment with respect to reference angle.