[Mristudio-users] Calculate gradient table using HARDI dataset on Philips 3T

[Makki Malek]

Hi Susumu and Michael

Philips has a 60 directions scheme which is implemented under research
mode. I've got the following one (attached file) for Achieva system. I
don't know if this table changes between 2 versions ..

It is also a good idea to check whether flipping X-Y, or Y-Z etc...
provides expecting results

I hops this helps.

Regards

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Malek I. Makki, PhD
Diagnostic Imaging Department
MRI Center
Kinderspital Zurich
 
Phone. +41(0)44 266 3130
Fax:      +41(0)44 266 7153
malek.makki at kispi.uzh.ch
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


-----Original Message-----
From: mristudio-users-bounces at mristudio.org
[mailto:mristudio-users-bounces at mristudio.org] On Behalf Of Michael
Borich
Sent: Tuesday, May 31, 2011 4:22 AM
To: DTI Studio, ROI Editor, DiffeoMap Questions/Support
Subject: Re: [Mristudio-users] Calculate gradient table using HARDI
dataset on Philips 3T

Hi Susumu, 

That is what I thought re: number of orientations. I tried using the
matlab script from Kennedy Krieger with user defined gradient directions
without success. It is a new sequence that our MR physicist wants to get
up and running. That being said, I am not certain if the scanner has
recently been updated. Will check on this issue. Will this type of
scanning protocol be compatible with DTI studio? Thanks again for the
prompt reply.

Best,
Michael


Michael Borich, DPT, PhD
Postdoctoral Research Fellow
University of British Columbia


On 2011-05-30, at 6:33 PM, susumu mori <susumu at mri.jhu.edu> wrote:

> Hi Mike,
> 
> Philips' built-in gradient has only 6, 15, or 32 orientations, unless
> there is something new in the latest operating system.
> 
> Where did you get the 60-orientation scheme?
> 
> Susumu
> 
> On Mon, May 30, 2011 at 8:50 PM, Michael Borich <mborich at umn.edu>
wrote:
>> Hello,
>> 
>> Does anyone know how to calculate 60 orientation gradient table for
data
>> collected on a Philips 3T? I tried using the Kennedy Krieger DTI
Gradient
>> Table creator but without success. Thanks in advance!
>> 
>> Best,
>> Michael
>> 
>> --
>> Michael Borich, DPT, PhD
>> Postdoctoral Research Fellow
>> University of British Columbia
>> 604-827-3369
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