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. 2017 Aug 30;8:631. doi: 10.3389/fphys.2017.00631

Figure 1.

Figure 1

Schematics of myofibril bundle orientation quantification. (A) Angles ϕ and θ were measured for each bundle. (A) ϕ and θ are the angles of the fibril bundle in the xy and xz planes in the sample volume, respectively. (B) ϕ and θ describe the bundle orientation in the circumferential and radial planes of the outflow tract, respectively.