From Ohm

Gradient-Magnitude DVR Technique

The gradient magnitude technique modulates the emission and absorption coefficients with the absolute value of the gradient vector (gradient magnitude).

Occuring effect: If the volume function is constant, the gradient is zero, so that the volume is rendered transparently. The gradient magnitude technique only shows interesting parts of the volume, that is the material boundaries between materials with different scalar values.

With and without GradMag:

WGradMag WOGradMag

Advantages:

Disadvantages:

Retrieved from http://schorsch.efi.fh-nuernberg.de/roettger/index.php/MedicalVisualization/GradientMagnitude

Page last modified on November 14, 2013, at 01:26 PM