Hi,
Before using FAST to segment g/w matters, we need to use BET. The output of
FAST is 3 segmented parts: gm, wm and csf. If we want to have an accurate
estimation of csf (cortical csf), then output of BET must not introduce
loss/gain of csf. However, I have the impression that BET is a
pre-processing tool basically designed to remove non-brain tissues (cortical
csf was not one of the major aims to be targeted as to be kept accurately?).
This is fine with g/w segmentation (ventricle csf is fine too), but not fine
if I wish to have an accurate csf estimation. Am I right on this about BET?
The reason for me to consider getting a reliable csf volume is to have a
measure of atrophy: the ratio of total brain tissue against total csf.
One more thing: is there any way of extracting ventricular csf in order to
get the measure of ventricle size and atrophy ratio please?
Many thanks,
Wei Wen
Neuropsychiatric Institute,
Prince of Wales Hospital/Univ. of NSW
Australia
***********************************************************************************
This email and the files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you are not the intended recipient, you are not permitted to distribute or use this message or any of its attachments in any way. We also request that you advise the sender of the incorrect addressing.
This note also confirms that this email message has been virus scanned and although no computer viruses were detected, South East Health accepts no liability for any consequential damage resulting from email containing any computer viruses.
***********************************************************************************
|