Figure 4

Magnified view of myofiber tractograms generated with DSI in the lateral wall of a normal rat heart. The crossing helical architecture of the myocardium is well seen. Myofiber tracts in the subendocardium (pink to navy-blue) and tracts in the subepicardium (green-yellow) have orthogonal helix angles and cross over each other in separate transmural planes.