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. Author manuscript; available in PMC: 2009 Oct 28.
Published in final edited form as: Neurobiol Aging. 2007 Apr 23;29(9):1285–1295. doi: 10.1016/j.neurobiolaging.2007.03.004

Figure 1. Volume Measures.

Figure 1

Image on the readers right illustrates tracing of the hippocampal and entorhinal cortex outlines. The image on the left illustrates computation of volume change with the boundary shift integral. Red demarcates pixels at the brain- CSF boundary where volume was lost from the baseline to follow up scan. The ventricular BSI is calculated by creating a hand drawn mask of the ventricle.