Unsupervised 3D Prostate Segmentation Based on Diffusion-Weighted Imaging MRI Using Active Contour Models with a Shape Prior

Figure 4

The prostate shape is fitted by a stack of ellipses. The first row are the ellipses, and the second row is the prostate outlined by a radiologist.

(a) near base

(b) mid-gland

(c) mid-gland

(d) near apex