[Mristudio-users] gradient table update

[susumu mori]

Hi Luca,

If you copy the gradient table supplied from a manufacturer into Dtitudio,
check the "adjust .." box, and read DICOM files, the table is recalculated
based on the oblique information in the DICOM. Note that this recalculation
is necessary for old SIEMENS system.

If you close DtiStudio and reopen the data, DtiStudio remembers the previous
table. Importantly, it remembes the table AFTER the recalculation. This
means, if you used oblique imaging, the table is differen from the one you
copied originally. So you have to either re-enter the original table (and
check the "adjust" button) or keep the recalculatd table and uncheck the
"adjust" button.

I hope this clears your question.

Susumu

On Sun, Jul 12, 2009 at 5:12 PM, <luca.binotto at unipd.it> wrote:

> Hello
> I am a beginner and I'm  in doubt about  the gradient table upgrade after
> AIR coregistration.
> If I decide to rewrite the dataset and I select the radiobutton "Adjusting
> the gradient table if applicable"
> and then  I interrupt the current work session (i.e. I close  DtiStudio),
> after reloading the same dataset  in a successive DtiStudio session,
> should I copy and paste the new gradient
> table written in the last part of the AirMatrix file text in order to
> compute again the diffusion tensor from the coregistered volumes?
> (And so, in every case have I to select "Save transformation matrices as
> file" in order to know the new gradient table to use when reloading? ).
>
> thank in advance,
>
> Luca
>
>
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