[Mristudio-users] Philips Achieva system gradient table

[llanyon]

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
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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
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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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