[Mristudio-users] tensor calculation

[susumu mori]

usually, that is caused by a mismatch between the number of images and the
gradient table you specified.

For example, if your gradient table consists of 6 orientations and your data
have 12 diffusion-weighted images, DtiStudio can't calculate a tensor.

If you are using the regular Siemens table, it should be a 12-orientation
scheme. After you load the image, find how many b0 and diffusion-weighted
images are loaded. Then confirm if it matches to the number of orientations
of the table you used.

The video tutorial in www.mristudo.org may help.

On Tue, Feb 1, 2011 at 5:42 PM, Felix Beacher <felixbeacher at hotmail.co.uk>wrote:

>  Hello!
>
> I am trying to get started with my first DTI analysis but have come across
> an early-stage problem with tensor calculation.
>
> I have loaded my data (Siemens DICOM, FA) and I am in the DTI mapping tab.
> The data looks as if it has loaded OK. However, when I hit the
> 'Original-ADC-STD-Mean' button I get an error message saying 'an invalid
> argument was encountered' followed by a blank screen saying 'image not
> ready'.
>
> Can anyone help with this?
>
> Many thanks
>
> Felix
>
>
>
>
>
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