Dear FreeSurfer Support team and Community
I am wondering if someone can give me an explanation of the difference between g-w.pct and g:w ratio (as calculated by; fscalc lh.gm.mgh div lh.wm.mgh -o lh.ratio.mgh)
Will both these measures essentially measure the relationship between grey and white matter signal intensity but in a different way?
Best, Derek
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Derek Sayre Andrews, MSc PhD Candidate
The Sackler Institute for Translational Neurodevelopment
Department of Forensic and Neurodevelopmental Sciences
Institute of Psychiatry, Psychology & Neuroscience, King's College London
Telephone: +44 (0)20 7848 5701 Email: Derek.Andrews@kcl.ac.uk
g-w.pct is computed as
pct = 100*(w-g)/((w+g)/2)
in the pctsurfcon script
On 12/03/2015 12:18 PM, Andrews, Derek wrote:
Dear FreeSurfer Support team and Community
I am wondering if someone can give me an explanation of the difference between g-w.pct and g:w ratio (as calculated by; fscalc lh.gm.mgh div lh.wm.mgh -o lh.ratio.mgh) Will both these measures essentially measure the relationship between grey and white matter signal intensity but in a different way?
Best, Derek
*Derek Sayre Andrews, MSc* PhD Candidate
The Sackler Institute for Translational Neurodevelopment
Department of Forensic and Neurodevelopmental Sciences
Institute of Psychiatry, Psychology & Neuroscience, King's College London
Telephone: +44 (0)20 7848 5701 Email: Derek.Andrews@kcl.ac.uk
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Andrews, Derek -
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