If anyone interested, here is a picture of this artifact from one of our
scanners
http://ric.uthscsa.edu/personalpages/petr/artifact.png
By the way Siemens is aware of this artifact and has a strategy for fixing
it. It is fairly involved fix that takes a couple days as the body coil has
to come out. But it is worth it!
pk
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf
Of Daniel Schwartz
Sent: Tuesday, October 27, 2009 1:43 PM
To: [log in to unmask]
Subject: Re: [FSL] analyzing DTI data with Siemens vibration artifact
Whose paper? what year?
________________________________________
From: FSL - FMRIB's Software Library [[log in to unmask]] On Behalf Of
Andreas Bartsch [[log in to unmask]]
Sent: Tuesday, October 27, 2009 11:40 AM
To: [log in to unmask]
Subject: [FSL] AW: [FSL] analyzing DTI data with Siemens vibration artifact
The easiest thing is to check Dan's HBM paper.
________________________________________
Von: FSL - FMRIB's Software Library [[log in to unmask]] im Auftrag von
Daniel Schwartz [[log in to unmask]]
Gesendet: Dienstag, 27. Oktober 2009 19:36
An: [log in to unmask]
Betreff: Re: [FSL] analyzing DTI data with Siemens vibration artifact
I would also please like a picture of this artifact
-Daniel
________________________________________
From: FSL - FMRIB's Software Library [[log in to unmask]] On Behalf Of
Martin Kavec [[log in to unmask]]
Sent: Tuesday, October 27, 2009 11:32 AM
To: [log in to unmask]
Subject: Re: [FSL] analyzing DTI data with Siemens vibration artifact
Hi Christina/Andreas,
would you mind sending (even off the mailing list) a snapshot of the
artifact. I am indeed on another vendor and I don't see anything obvious.
Many thanks,
Martin
On Tue, Oct 27, 2009 at 5:23 PM, Christina
<[log in to unmask]<mailto:[log in to unmask]>> wrote:
Hi I have a dataset that has been affected by the infamous Siemens vibration
artifact.
I am desperately trying to make use of the dataset and doing TBSS analysis
by following the directions which results in no significance in my areas of
interest (or anywhere).
Since the artifact happens in an area that does not include my regions of
interest I have been going in the direction of trying to mask out the
artifact part of the brain during the randomise command with the -m option.
Unsuccessfully.
At this point I am wondering if the artifact is affecting my normalization
during the tbss_2_reg step or possibly the skeletonisation and creation of
the mean FA image during the tbss_3_postreg step?
Does anyone have a suggestion?
Any direction would be appreciated!
Thanks
Chrissy
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