Hi - yes you could try a different cluster-forming threshold - or you
could try the shiny new TFCE option in randomise.
Cheers.
On 15 Aug 2007, at 14:42, Thomas Doering wrote:
> 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
>> ---------------------------------------------------------------------
>> - -- ---
>
>
> ----------------------------------------------------------------------
> -- ---
> 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
> ----------------------------------------------------------------------
> -- ---
------------------------------------------------------------------------
---
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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