Figure 1
From: Shape (but not volume) changes in the thalami in Parkinson disease
The SPHARM-based method for shape determination. The shape to be specified (the thalamus) and two concentric spherical shells are shown. On the right is the intersection between the thalamus and shells as a function of rotation (θ) and azimuth (□). The rotation angle spans from 0 to 2π radians, and the azimuth angle is from 0 to π radians.