[Mristudio-users] mristudio-users Digest, Vol 147, Issue 2

[Susumu Mori]

I think you can start with the video tutorial in www.mristudio.org.
There is also "Getting Started" for DiffeoMap.
We also have monthly 2-day tutorials in Hopkins. If you are interested in,
please send an email to Xin Li (xli16 at jhmi.edu).




On Tue, Aug 20, 2013 at 11:42 AM, Rotem Saar <saar.rotem at gmail.com> wrote:

> Dear Susumu,
>
> Thank u for your explanation.
> So I understand now that the AIR tool is for intra-DTI motion correction -
> I will register my images to the b0 one.
> You understood me correctly when saying that I want to perform a
> cross-scan, within-subject image alignment.
> I now understand that u have a tool named DiffeoMap that can do that, i.e.
>  perform DTI calculation first, and then register images (e.g. T1 vs DTI)
> using DiffeoMap. - Since I don't know this tool - can u direct me to a
> place where I can read about how to use it ?
>
> Thanks you all for your great help !
>
> Rotem
>
> Hi Rotem,
>
> I'm not quite sure what you want to do in #2. Are you trying to use, say, a
> T1-weighted image, as a reference image and register all DWIs to the
> anatomical scan?
>
> If you want to do so, you need to load both T1 and DTI data within one
> window. It may work, but the AIR in DtiStudio was developed for intra-DTI
> motion correction, not for cross-scan registration. So, I've never tried
> it.
>
> For the cross-scan, within-subject image alignment, we usually perform DTI
> calculation first, and then register images (e.g. T1 vs DTI) using
> DiffeoMap.
>
> Susumu
>
>
>
> On Mon, Aug 19, 2013 at 6:57 AM, Rotem Saar <saar.rotem at gmail.com> wrote:
>
> > Dear experts,
> >
> > I am a new user of DTI studio who wants to analyze my DTI data using
> > DTIstudio.
> > We use a Philip scanner 1.5T and we are working with DICOMs, 1 b0, 15
> > gradients and from the last one (17) we ignore. All in all - we have 714
> > dicoms we enter to DTIstudio.
> > I'm trying to understand what (and how many) registrations I need to
> > perform -
> >
> > 1) I want all the DTI images will be referenced to the b0 image. To do
> > that, I guss I need to mark the first gradient in my list (which is the
> b0)
> > for reference image, under "automatic image registration". Under "images
> to
> > be registered" I will take all my DTI gradients. I marked the Affine
> > transformation, and it seemed to work.
> >
> > 2) Now, what happens if I want to take the created data on AIR format as
> > created in the last step (I did not mark the "create new images" under
> > "automatic image registration" on purpose) and register it to the
> > anatomical data, *and only then *- calculate the tensor ? Should I now
> > define the reference image as one of the anatomical images, and under
> > "images to be registered" take all the Air DTI gradients (created in step
> > 1) ?
> >
> > I read the tutorial, watched all your videos, even read in *.doc file on
> > the net and went to read qs in the forum hopping to find answers - but
> with
> > no luck.
> >
> > If you will be able to specified the steps I need to perform / direct me
> > to the place I can find detailed instructions on "automatic image
> > registration" this will help allot !!
> >
> > Thank you so much for your help,
>
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