Hello Andreas,
See my in line question.
Iwo
>Hello Iwo,
>
>No, the data are not registered to any template.
>
> I've different acquisitions: For example, one structural volume (created
> with an MP Rage sequence) with a relative high resolution. But I also
> have some EPI images with a lower spatial resolution, 3x3x5 ... from
> this/these 3-dimensional blocks, I want to choose an ellipsoid/are/ROI,
> which contains mainly the region of the V1... In 3DSlicer there is an
> modul/option to create a 3D Boxed ROI, but as I understand, it was just
> for visualization, and no possibility to export the mask to nifti.
Is there any specific reason you don't want to do any registration? e.g
either EPIs to an EPI template, or to your structural/template? If you
could register your EPI/structurals, then you could use an atlas roi for
V1? It would be more realistic representation of the actual V1? What is the
purpose of using ROIs in your study?
> As far I have tested mashbar, it seems partley be an option for creating
> 3D mask, but it is not very comfortable. I think that using a sphere may
> not be a good approximation for V1. And I only can uses boxes which seems
> to be vertically and horizontally to the image space..
>
> But I need some sloped boxes... A variant of
> http://www.slicer.org/slicerWiki/index.php/File:ROIModule.png would be
> nice... Maybe I should have a closer look at 3DSlicer
>
>Thanks
>
>Andreas
>
>
>
>
>----- Original Nachricht ----
>Von: Iwo Bohr <[log in to unmask]>
>An: An Re <[log in to unmask]>
>Datum: 08.08.2011 17:40
>Betreff: Re: [SPM] ROI selection
>
>> Hi Andreas,
>>
>> Your brain is not registered to any template? So you cannot use
>> atlases, but you can still refer to peak of clusters of activation
>> (assuming you've done a functional study somehow lignting up your ROI).
>> Based on them you can create a ROI (eg spherical) in Marsbar toolbox and
>> then export it as a nifti image if you need this format.
>>
>> Not sure if it answers your questions?
>>
>> Iwo
>>
>> On Aug 8 2011, An Re wrote:
>>
>> >Hello,
>> >
>> > for some kinds of experiment I had to create a three dimensional ROI
>> > at an unnormalized 3D volumne.
>> >
>> > Based on a nifti-file I want to create, a ROI, for example containing
>> > the
>>
>> > V1... It don't have to be exact... Some kind of ellipsoid would be ok.
>> >
>> >Would program/tool would be appropriate.... ?
>> >
>> >Thanks
>> >
>> >Andreas
>> >
>>
>> --
>>
>> Iwo
>>
>>
>
>
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--
Iwo
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