Additional file 9: Movie 3.
Movie 3 - visualization of the putative myocyte orientations from ST and DTI through the volume of the rat heart. The treatment and presentation of the cardiac volume is as described for Movie 1&2 and familiarization with the views presented in these movies is essential before viewing Movie 3. The cardiac volume is false-colored (according to the color scale shown) for the angles α’ and α” of the putative myocyte orientation. The epicardial surface is shaded dark gray and the left ventricle endocardial surface is shaded light gray. The movie has two successive labelled 360° rotations of the cardiac geometry through a static cropping plane (the red square) showing the following putative myocyte angles: In the first rotation, on the left the putative myocyte helix angle (α’) from ST (i.e. α’v31 ST) and on the right the putative myocyte helix angle (α’) from DTI (i.e. α’e1 DTI); In the second rotation, on the left the putative myocyte transverse angle (α”) for ST (i.e. α”v1 ST) and on the right the putative myocyte transverse angle (α”) for DTI (i.e. α”e1 DTI). The tissue presented and the cut from the image are described above the cardiac volume. DTI: parameters: 12-direction, b = 1000 s/mm2; ST parameters: DTW = 3, STW = 3. FLASH: fast low angle shot; ST: structure tensor of FLASH data; DTI: diffusion tensor magnetic resonance imaging; DTW: derivative template width STW: smoothing template width. The symbols for vectors and derived angles are defined in Table 2.