Ridges in 3D 

A ridge filter highlights voxels with a high main principal curvature in the intensity distribution. This, for example, applies to fascia in between muscle tissue.

In[1]:=

X img = ExampleData[{"TestImage3D", "MRknee"}]

Out[1]=

In[2]:=

X r = RidgeFilter[img]

Out[2]=

In[3]:=

X ra = ImageAdjust[r];

Side-by-side rendering of each slice of the original and filtered knee volume.

In[4]:=

X Manipulate[ ImageAssemble[{Image3DSlices[img, {s}][[1]], Image3DSlices[ra, {s}][[1]]}], {s, 1, ImageDimensions[img][[3]], 1}]

Play Animation Stop Animation