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

[Alina Jurcoane]

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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