Hi Katherine - Do the freesurfer segmentations look ok? What about the
registration from structural to diffusion? You can inspect those
quickly with:
freeview dmri/dtifit_FA.nii.gz
dlabel/diff/aparc+aseg.bbr.nii.gz:colormap=lut:opacity=.3
Hope this helps,
a.y
On Sun, 3 Jan 2016, Katherine Damme wrote:
First I should note that using the same scripts I completed 52 participants
successfully and am currently trying to
batch process the newest 42 participants that are only failing at the path
level. Upon Visual Inspection they all
appear normal (with the exception of the one attached). After carefully
comparing a random sample of 5 from each
group images from the files that failed versus the files that were successful,
I found:
1. The range of values in the mean_ph1samples in the successful ( i.e. -3.00 to
87.30 ) differed from the failures
(i.e. -2 to 17) (the successful samples varied on their high end from 50-114
but the failures were on the 5-24
range)
2. The range of values in the mean_th1samples in the successful ( -0.02 to
19.12) differed from the failures
(-0.00267 to 7.176) (the successful samples varied on their high end from 19-17
but the failures were on the 3-10
range)
3. Some, but not all (2/5), mean_S0samples, had a abnormal range in successful
(0 to 19998.4) compared to the
unsuccessful (0 to 709.96)
However, I understand that the diffusion units are likely arbitrary and not
sure these patterns will hold in a
larger sample.
I know this is a lot of confusing information and so in response to your
question. After an initial inspection
there are two types of output:
1. data that appears visually normal with a slightly altered range.
Should I be concerned about the range if all other data looks fine?
2. data that appears visually normal with a normal range and bizarre merged
files.
What do you think could be a cause of these odd merged files?
On Tue, Dec 22, 2015 at 1:54 PM, Anastasia Yendiki
<ayend...@nmr.mgh.harvard.edu> wrote:
Hi Katherine - Have you looked at any of the intermediate images? Do they
look normal?
a.y
On Mon, 21 Dec 2015, Katherine Damme wrote:
Hello Everyone!
It looks as though my prep and bedp stages completed properly, but
the prep stage ends in a
segmentation
errror.
See attached and let me know your thoughts. I would prefer not to
have to redo all steps if
possible!
Thank you!
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