[Mristudio-users] Gradient Table for Philips

[Chunxiao Zhou]

Prof. Susumu,

Thank you very much for your very detailed information and help! Have a nice
holiday!

Chunxiao(Andrew)

On Wed, Nov 24, 2010 at 6:26 AM, susumu mori <susumu at mri.jhu.edu> wrote:

> 1) Please read your REC file using Mri3DView. Use the image dimensions you
> get from the PAR file.
> 2) After the images are read, please go through the images using the
> pull-down menu in the right column of the viewing window. Check if all the
> images (b0 and DWIs) look fine.
> 3) Find out how many 3D images are loaded. If you used Philips "High"
> gradient orientation, you should have 34 images loaded; one b0, 32 DWIs, and
> one calculated DWIs (I think this is the sum of all DWIs).
> 4) Make sure where is b0. It could be the first or the second from the
> last. The calculated DWI is always at the end.
> 5) Close the window and start DtiMapping.
> 6) Cut&Paste your gradient table to the appropriate section. You have to
> make sure several things here;
> a: The position of b0; First or the second from the last
> b: The number of rows; It has to be 34. Sometimes you find a table with
> only 33 lines ignoring the last calculated image. In this case, you get the
> error message, complaining that the file size doesn't match. Because the
> last image is not used anyway, you can ignore the message and proceed. The
> last image is thrown away. Or, you can increase the number of row to 34 by
> adding 33: 100, 100, 100, in which [100, 100, 100] send the message to
> DtiStudio to remove this image.
> c: Please make sure if you used "gradient overplus ON" or "OFF", because
> you have to use different tables.
> 7) If you still get the file size error message, something is wrong.
>
>  On Tue, Nov 23, 2010 at 5:21 PM, Dresner, Alex <alex.dresner at philips.com>wrote:
>
>>    Dear Chunxiao,
>>
>> Your gradient table is also in the .PAR file.  You should be able to read
>> the .PAR file with any text reader such as WordPad, NotePad or Word; lower
>> in the file is a table of parameters per-image.  On the right-hand-side of
>> that table are the diffusion directions in three columns.
>>
>>
>>
>> Regards,
>>
>> Alex
>>
>>
>>
>> ____________________
>>
>> M. Alex Dresner, Ph.D.
>>
>> MR Clinical Scientist
>>
>> alex.dresner at philips.com
>>
>> ____________________
>>
>>
>>
>>
>>
>>
>>
>> *From:* mristudio-users-bounces at mristudio.org [mailto:
>> mristudio-users-bounces at mristudio.org] *On Behalf Of *Chunxiao Zhou
>> *Sent:* Tuesday, November 23, 2010 5:07 PM
>> *To:* mristudio-users at mristudio.org
>> *Subject:* [Mristudio-users] Gradient Table for Philips
>>
>>
>>
>> Hello,
>>
>>
>>
>> When I do tensor calculation for my own data , there is a warning message
>> "File size is bigger than DW-image size, continue anyway?". I get all image
>> size parameters from my .par file ( I use Philip .REC .PAR data). I guess
>> the reason is that I use the default ParRec gradient table from your
>> GradientTable file. How could I get my gradient table from my file?
>>
>>
>>
>> Thank you.
>>
>>
>>
>> Chunxiao(Andrew)
>>
>> ------------------------------
>> The information contained in this message may be confidential and legally
>> protected under applicable law. The message is intended solely for the
>> addressee(s). If you are not the intended recipient, you are hereby notified
>> that any use, forwarding, dissemination, or reproduction of this message is
>> strictly prohibited and may be unlawful. If you are not the intended
>> recipient, please contact the sender by return e-mail and destroy all copies
>> of the original message.
>>
>> _______________________________________________
>> mristudio-users mailing list
>> mristudio-users at mristudio.org
>> http://lists.mristudio.org/mailman/listinfo/
>> Unsubscribe, send a blank email to:
>> mristudio-users-unsubscribe at mristudio.org
>>
>>
>
> _______________________________________________
> mristudio-users mailing list
> mristudio-users at mristudio.org
> http://lists.mristudio.org/mailman/listinfo/
> Unsubscribe, send a blank email to:
> mristudio-users-unsubscribe at mristudio.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.mristudio.org/pipermail/mristudio-users/attachments/20101124/aeb45930/attachment.html