<HTML dir=ltr><HEAD><TITLE>Re: [Mristudio-users] gradient for GE Signa HDx</TITLE>
<META content="text/html; charset=unicode" http-equiv=Content-Type>
<META name=GENERATOR content="MSHTML 8.00.6001.18904"></HEAD>
<BODY>
<DIV dir=ltr id=idOWAReplyText64918>
<DIV dir=ltr><FONT color=#000000>Hi Susumo</FONT></DIV>
<DIV dir=ltr>Hi Kevin</DIV>
<DIV dir=ltr> </DIV>
<DIV dir=ltr>The table is used wthout any flip. For fiber-tracking, I apply z-flip (not x-sflip), and perfom this on well known tract.</DIV>
<DIV dir=ltr> </DIV>
<DIV dir=ltr>Regards</DIV>
<DIV dir=ltr> </DIV></DIV>
<DIV dir=ltr><BR>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>From:</B> mristudio-users-bounces@mristudio.org on behalf of susumu mori<BR><B>Sent:</B> Mon 4/25/2011 4:40 AM<BR><B>To:</B> DTI Studio, ROI Editor, DiffeoMap Questions/Support<BR><B>Subject:</B> Re: [Mristudio-users] gradient for GE Signa HDx<BR></FONT><BR></DIV>
<DIV>
<P><FONT size=2>Hi Kevin,<BR><BR>sometimes, gradient table signs are already corrected. Have you tried<BR>Makki's table without X-flip?<BR><BR>Susumu<BR><BR>On Sun, Apr 24, 2011 at 4:43 PM, Kevin Spitler <kevinspitler@ucla.edu> wrote:<BR>> Thank you Dr. Makki. The datasets load in DTIStudio now with a good<BR>> color map 0.<BR>><BR>> I have a problem with tractography, when I attempt to do pathways<BR>> thattravel in the rostral-caudal plane. For example, in attempts of<BR>> the<BR>> Inferior longitudinal fasciculus and the anterior thalamic radiation,<BR>> using the Wakana et al., 2007 methods, the resultant tractography only<BR>> travels in the Superior-Inferior plane, and these tracts have<BR>> signifcant rostro-caudal projection. Would this hint at a specific<BR>> problem in the way I load of the data? (images of the tractography<BR>> are too large to send to the group)<BR>><BR>> I am using the gradient from Dr. Makki with format modification with<BR>> gradient line number and a colon:<BR>> 0: 0,0,0<BR>> 1: 1.000000 0.000000 0.000000<BR>> 2: 0.726000 0.688000 0.000000<BR>> 3: 0.167000 -0.199000 0.966000<BR>> 4: 0.732000 -0.619000 -0.284000<BR>> 5: -0.239000 -0.710000 0.662000<BR>> 6: -0.759000 -0.223000 0.612000<BR>> 7: 0.544000 0.480000 0.688000<BR>> 8: 0.079000 0.997000 -0.005000<BR>> 9: 0.773000 -0.183000 0.608000<BR>> 10: 0.485000 -0.782000 0.392000<BR>> 11: 0.081000 -0.788000 -0.611000<BR>> 12: 0.363000 -0.245000 -0.899000<BR>><BR>> For Fiber Tracing, I click the "X-component" on the Flip Eigen Vector.<BR>><BR>> I typically analyze data from a Siemens machine, so I am having<BR>> trouble with this data and appreciate your help.<BR>><BR>> Best,<BR>> Kevin<BR>><BR>> On Wed, Apr 20, 2011 at 5:46 AM, Makki Malek <Malek.Makki@kispi.uzh.ch> wrote:<BR>>> -----BEGIN PGP SIGNED MESSAGE-----<BR>>> Hash: SHA256<BR>>><BR>>><BR>>> Hi Kevin<BR>>><BR>>> Below the 12D scheme on our HDxt. Unless you modified the sequence,<BR>>> your 2 b0 set of data are acquired first in a GE system.<BR>>><BR>>><BR>>> 1.000000 0.000000 0.000000<BR>>> 0.726000 0.688000 0.000000<BR>>> 0.167000 -0.199000 0.966000<BR>>> 0.732000 -0.619000 -0.284000<BR>>> - -0.239000 -0.710000 0.662000<BR>>> - -0.759000 -0.223000 0.612000<BR>>> 0.544000 0.480000 0.688000<BR>>> 0.079000 0.997000 -0.005000<BR>>> 0.773000 -0.183000 0.608000<BR>>> 0.485000 -0.782000 0.392000<BR>>> 0.081000 -0.788000 -0.611000<BR>>> 0.363000 -0.245000 -0.899000<BR>>><BR>>><BR>>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<BR>>> Malek I. Makki, PhD<BR>>> Diagnostic Imaging Department<BR>>> MRI Center<BR>>> Kinderspital Zurich<BR>>><BR>>> Phone. +41(0)44 266 3130<BR>>> Fax: +41(0)44 266 7153<BR>>> malek.makki@kispi.uzh.ch<BR>>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<BR>>><BR>>><BR>>><BR>>> - -----Original Message-----<BR>>> From: mristudio-users-bounces@mristudio.org<BR>>> [<A href="mailto:mristudio-users-bounces@mristudio.org">mailto:mristudio-users-bounces@mristudio.org</A>] On Behalf Of Kevin<BR>>> Spitler<BR>>> Sent: Wednesday, April 20, 2011 1:31 PM<BR>>> To: Mristudio-users@mristudio.org<BR>>> Subject: [Mristudio-users] gradient for GE Signa HDx<BR>>><BR>>> Hello,<BR>>><BR>>> What gradient is used for DTIStudio for a GE Signa HDx? The parameters<BR>>> are<BR>>> 12 directions<BR>>> 2 b values, including 1000<BR>>><BR>>> Thank you for your help<BR>>><BR>>> Best,<BR>>> Kevin<BR>>> _______________________________________________<BR>>> mristudio-users mailing list<BR>>> mristudio-users@mristudio.org<BR>>> <A href="http://lists.mristudio.org/mailman/listinfo/">http://lists.mristudio.org/mailman/listinfo/</A><BR>>> Unsubscribe, send a blank email to:<BR>>> mristudio-users-unsubscribe@mristudio.org<BR>>><BR>>> -----BEGIN PGP SIGNATURE-----<BR>>> Version: PGP Universal 3.1.0 (Build 860)<BR>>> Charset: us-ascii<BR>>><BR>>> wsBVAwUBTa7VkUf0hhcdLXEYAQi4+QgAtBqC+4hwhla9syA97C/gWeaCMnmWn43u<BR>>> up0lpnntg2cRr755ibvdlRDu9Qd1l83o14OkyeWB5fZ7Rxb3WIC/V0iF0ffo5sSK<BR>>> UXDFIn1DKBx17gXYiDCS52JJ48Qu3uAALNImwLFGNnMhIT3YAH/5f2rTFpZnss8k<BR>>> 1VnvKvwL47Eek1SSMPc6AoVD+7KIicgJwGvR0/4Y1TrVGuMjdXnCyTQoc1j3QK2y<BR>>> k3htT6c70Hv+9jDjmd45GKG8AuKK6mO7j8b3wEIcY7mGEB8rX7Omn4DhXA/N/Syt<BR>>> iAg4fK5MgDNREyZpjNaPpbOnkFJqzYOEPot9lWvH398cUvwLYDGXVw==<BR>>> =O8Dg<BR>>> -----END PGP SIGNATURE-----<BR>>> _______________________________________________<BR>>> mristudio-users mailing list<BR>>> mristudio-users@mristudio.org<BR>>> <A href="http://lists.mristudio.org/mailman/listinfo/">http://lists.mristudio.org/mailman/listinfo/</A><BR>>> Unsubscribe, send a blank email to: mristudio-users-unsubscribe@mristudio.org<BR>>><BR>><BR>> _______________________________________________<BR>> mristudio-users mailing list<BR>> mristudio-users@mristudio.org<BR>> <A href="http://lists.mristudio.org/mailman/listinfo/">http://lists.mristudio.org/mailman/listinfo/</A><BR>> Unsubscribe, send a blank email to: mristudio-users-unsubscribe@mristudio.org<BR>><BR>><BR><BR>_______________________________________________<BR>mristudio-users mailing list<BR>mristudio-users@mristudio.org<BR><A href="http://lists.mristudio.org/mailman/listinfo/">http://lists.mristudio.org/mailman/listinfo/</A><BR>Unsubscribe, send a blank email to: mristudio-users-unsubscribe@mristudio.org<BR><BR></FONT></P></DIV></BODY></HTML>