Hi Steve,
thanks for taking a look at my files.
I was looking at the stats2 images ( now i also sent it to you:
ref.nr.916442)
and the max -value is 0.69, so again no significant region.
Do you think rerunning the tbss analyze with other parameters (threshold
etc. ) would bring other results? In this study i just run the axial DTIs,
but we also run sagital DTIs - perhaps its worth to try this...
Cheers
Thomas
Original Message -----
From: "Steve Smith" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, August 14, 2007 2:07 PM
Subject: Re: [FSL] TBSS -Results
Hi - thanks for sending the data. The first thing to note is that if
you look at the histogram of tstat1, there is a strong negative
global shift - i.e. globally you have negative correlation with the
covariate. If this is the patients-normals shift then this suggests
that you should be looking for significance in the tstat2 contrast
not 1?
There is nothing of significance in maxc_tstat1 - the max value is
0.34 i.e. p<0.66.
Cheers, Steve.
On 14 Aug 2007, at 15:13, Thomas Doering wrote:
> Hi Steve,
>
> i made an upload of some of my results (thomas_result.zip - ref.nr.
> 263566). There is also a png image of the slice(slice 63) i am specially
> interested. In this study i expect some significant diference in FA
> values between controls and patients in the Frontal Lobe. But after
> looking to the results of TBSS i am not sure anymore, if there is really
> a change in FA...The significant areas seems to bee to small that i could
> conclude something. What do you mean?
>
> Thanks for your help ,
> Thomas
>
> ----- Original Message ----- From: "Steve Smith" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, August 14, 2007 2:56 AM
> Subject: Re: [FSL] TBSS -Results
>
>
> Hi - sure, we can take a quick look - upload to the normal place.
> Cheers.
>
>
> On 13 Aug 2007, at 13:19, Thomas Doering wrote:
>
>> Dear FSL Users,
>>
>> I recently run the TBSS script on the dtiFit' ed data to make a simple
>> two group statistical comparision. I had no problems to run the script,
>> just now when analyzing the statistical maps.
>> There are some regions in the tracts, they appear significantly
>> different from the rest, but i wonder if those regions appears because
>> of perhaps misregistration problems, warping problems etc.
>> It would be very nice if somebody could take a look on my results and
>> give me some clue.
>> And If so, how i could pass the images to you? ( i unfortunatly still
>> donīt have an own server where it would be possible to make the
>> download...)
>>
>> Thanks for help,
>> Thomas
>>
>
>
> ----------------------------------------------------------------------
> -- ---
> Stephen M. Smith, Professor of Biomedical Engineering
> Associate Director, Oxford University FMRIB Centre
>
> FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
> +44 (0) 1865 222726 (fax 222717)
> [log in to unmask] http://www.fmrib.ox.ac.uk/~steve
> ----------------------------------------------------------------------
> -- ---
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---
Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
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