[Mristudio-users] Philips Achieva system gradient table

[Seongjin]

Thank a lot. Linda.

On Fri, Jun 27, 2008 at 11:55 AM, llanyon <llanyon at eyecarecentre.org> wrote:

> Hi Seongjin
>
> You need to make sure the B0 line in the gradients table is in the same
> position as it is in the data - just move the line of zeros up to position
> zero and shift the rest down.
>
> cheers
> Linda
>
> -----------------------------------------------------------------------------------------------------
> Linda Lanyon
> Post-doctoral Research Fellow, Michael Smith Foundation for Health Research
> University of British Columbia
> Human Vision & Eye Movement Laboratory
> Vancouver General Hospital Eye Care Centre
> 3rd Floor Research Labs - Rm 365
> 2550 Willow St, Vancouver, B.C., Canada
> Phone: +1-604-875-4111 x 69003
> Fax: +1 604-875-4663
> email: llanyon at eyecarecentre.org
> web:
> http://www.neuroophthalmology.ca/UBCNeuroOp/JBarton/labstaff/Linda.htm
> Director, Society for Canadian Women in Science and Technology:
> www.scwist.ca
>
> -----------------------------------------------------------------------------------------------------
> ________________________________________
> From: mristudio-users-bounces at mristudio.org [
> mristudio-users-bounces at mristudio.org] On Behalf Of [Seongjin] [
> choisj70 at gmail.com]
> Sent: 27 June 2008 06:10
> To: DTI Studio, ROI Editor, Landmarker Questions/Support
> Subject: [Mristudio-users] Philips Achieva system gradient table
>
> Dear all,
>
> I am a Philips Achieva system user and recently started using DTI studio.
> A given gradient table for DTI_low is as follows:
>
> 1.0000 0.0000 0.0000
> 0.0000 1.0000 0.0000
> 0.0000 0.0000 1.0000
> -0.7044 -0.0881 -0.7044
> 0.7044 0.7044 0.0881
> 0.0881 0.7044 0.7044
> 0.0000 0.0000 0.0000
>
> So I use gradient table in DTI with following table.
> Somehow, b0 is located at the last.
>
> 0:1.0000, 0.0000, 0.0000
> 1:0.0000, 1.0000, 0.0000
> 2:0.0000, 0.0000, 1.0000
> 3:-0.7044, -0.0881, -0.7044
> 4:0.7044, 0.7044, 0.0881
> 5:0.0881, 0.7044, 0.7044
> 6:0.0000, 0.0000, 0.0000
>
> Philips system DTI output image start with b0 image.
> I wonder if I am using the right table or in the right order for gradients.
>
> Best,
>
> Seongjin
>
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