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Modulation tutorial

by Ged Ridgway

 

08 Mar 2010

Simple illustration of the Jacobian determinant as a geometric scaling factor

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Description

This graphical tutorial is intended to help neuro-imaging researchers from non-mathematical backgrounds to understand the so-called "modulation" process in voxel-based morphometry. This preserves volume (locally and globally) in spatially normalised (warped) images by multiplying the original probabilistic segmentation values by the determinant of the Jacobian matrix of the geometric warp at each voxel.

MATLAB release MATLAB 7.4 (R2007a)
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neuroimaging Ged Ridgway 08 Mar 2010 12:39:06
morphometry Ged Ridgway 08 Mar 2010 12:39:06
vbm Ged Ridgway 08 Mar 2010 12:39:06
tbm Ged Ridgway 08 Mar 2010 12:39:06
jacobian Ged Ridgway 08 Mar 2010 12:39:06
determinant Ged Ridgway 08 Mar 2010 12:39:06
modulation Ged Ridgway 08 Mar 2010 12:39:06
change of variables Ged Ridgway 08 Mar 2010 12:39:06
integral Ged Ridgway 08 Mar 2010 12:39:06

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