[Mristudio-users] Forget gradient of B0-image? error message

[Juergen Haenggi]

Hi Alina

Thanks for confirming that it works with B0 images in the first place. It
was a formatting problem with the bvecs files originated from Mac. Now it
works.

Regards

Juergen


On 15.4.2008 19:36 Uhr, "Alina Jurcoane" <alinajurcoane at hotmail.com> wrote:

> Hi Juergen,
> 
> I always had the B0 images at the beginning and it always worked, so it
> should work for you too. Are you sure you defined well the gradient table?
> For your case, it should look like this for a hypotethical example of
> 3B0+12Grads: first 3 lines zero in all directions and the following 12 lines
> with the gradient values. Something like this:
> 
>  0:  0.0000, 0.0000, 0.0000
>  1:  0.0000, 0.0000, 0.0000
>  2:  0.0000, 0.0000, 0.0000
>  3:  1.0000, 0.0000, 0.5000
>  4:  0.0000, 0.5000, 1.0000
>  5:  0.5000, 1.0000, 0.0000
>  6:  1.0000, 0.5000, 0.0000
>  7:  0.0000, 1.0000, 0.5000
>  8:  0.5000, 0.0000, 1.0000
>  9:  1.0000, 0.0000, -0.5000
> 10:  0.0000, -0.5000, 1.0000
> 11:  -0.5000, 1.0000, 0.0000
> 12:  1.0000, -0.5000, 0.0000
> 13:  0.0000, 1.0000, -0.5000
> 14:  -0.5000, 0.0000, 1.0000
> 
> Hope it helps.
> 
> Regards,
> Alina
> ______________________________________
> Alina Jurcoane
> Klinikum der JWGoethe Universität
> Institut für Neuroradiologie
> Schleusenweg 2-16 (Haus 95)
> 60528 Frankfurt/M, DE
> Tel +49 (0)69 6301-6617
> 
> ----- Original Message -----
> From: "Juergen Haenggi, Psychological Institute"
> <j.haenggi at psychologie.uzh.ch>
> To: <mristudio-users at mristudio.org>
> Sent: Tuesday, April 15, 2008 7:19 PM
> Subject: [Mristudio-users] Forget gradient of B0-image? error message
> 
> 
>> Dear MRI Studio users
>> 
>> I tried to run DTI Mapping. Although I specified three B0-images (the
>> first
>> three acqusitions), the following error occurred:
>> 
>> Forget gradient of B0-image?
>> 
>> From the examples on the MRI Studio website I recognized that there is
>> always the last image which is not diffusion-weighted.
>> 
>> Does the last image have to be a B0-image?
>> 
>> What happens? Any help is appreciated.
>> 
>> Best regards
>> Juergen Haenggi
>> 
>> -------------------------------------------------
>> Juergen Haenggi
>> Ph.D. (Dr. des.)
>> Division of Neuropsychology
>> Institute of Psychology
>> University of Zurich
>> Binzmuehlestrasse 14, PO Box 25
>> 8050 Zurich, Switzerland
>> 0041 44 635 73 97 (phone office)
>> 0041 76 445 86 84 (phone mobile)
>> 0041 44 635 74 09 (fax office)
>> BIN 4.D.04 (office room number)
>> j.haenggi at psychologie.uzh.ch (email)
>> http://www.psychologie.uzh.ch/neuropsy/ (website)
>> http://www.juergenhaenggi.ch (private website)
>> -------------------------------------------------
>> _______________________________________________
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>> Mristudio-users at mristudio.org
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>> 
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-----------------------------------------------------------
Juergen Haenggi
Ph.D. (Dr. des.)
Division of Neuropsychology
Institute of Psychology
University of Zurich
Binzmuehlestrasse 14, PO Box 25
8050 Zurich, Switzerland
0041 44 635 73 97 (phone office)
0041 76 445 86 84 (phone mobile)
0041 44 635 74 09 (fax office)
BIN 4.D.04 (office room number)
j.haenggi at psychologie.uzh.ch (email)
http://www.psychologie.uzh.ch/neuropsy/ (website)
http://www.juergenhaenggi.ch (private website)
-----------------------------------------------------------