Fig. 9.

Fiber orientation as a function of depth. Three volumes of OCT image data were acquired and processed for each chambers from Heart I to Heart III. The relationship is linearly fitted by least square method. The fiber orientations are quantified in each en face plane. The mean of orientation over an area of 1 mm × 1mm is plotted at different depth from epicardial side. The experiments in different chambers: (a) right atrium, (b) left atrium, (c) right ventricle, (d) ventricular septum and (e) left ventricle. The fiber orientation changes monotonically with depth. “EP” denotes epicardium. “EN” denotes endocardium.