<DIV><BR></DIV>
<DIV></DIV><BR><PRE><BR>At&nbsp;2011-05-26&nbsp;16:57:26，"Castaneda,&nbsp;Salvador"&nbsp;&lt;salvador.castaneda@med.uni-tuebingen.de&gt;&nbsp;wrote:

&gt;Hey&nbsp;jacquie,
&gt;
&gt;I&nbsp;had&nbsp;the&nbsp;exact&nbsp;same&nbsp;issue&nbsp;when&nbsp;i&nbsp;started&nbsp;using&nbsp;it.&nbsp;What&nbsp;i&nbsp;did&nbsp;was&nbsp;export&nbsp;the&nbsp;all&nbsp;the&nbsp;maps&nbsp;i&nbsp;was&nbsp;measuring&nbsp;(FA,&nbsp;RD,&nbsp;ADC..)&nbsp;as&nbsp;analyze&nbsp;files.&nbsp;Then&nbsp;i&nbsp;used&nbsp;another&nbsp;software,&nbsp;in&nbsp;my&nbsp;case&nbsp;Pmod,&nbsp;and&nbsp;then&nbsp;uploaded&nbsp;all&nbsp;the&nbsp;files.&nbsp;The&nbsp;files&nbsp;have&nbsp;the&nbsp;same&nbsp;header&nbsp;and&nbsp;so&nbsp;they&nbsp;are&nbsp;already&nbsp;coregistered,&nbsp;you&nbsp;only&nbsp;have&nbsp;to&nbsp;(&nbsp;i&nbsp;prefer)&nbsp;manually&nbsp;coregister&nbsp;them&nbsp;to&nbsp;an&nbsp;anatomy.&nbsp;Then&nbsp;i&nbsp;drew&nbsp;the&nbsp;rois&nbsp;there.&nbsp;ROI&nbsp;editor&nbsp;from&nbsp;the&nbsp;dti&nbsp;studio&nbsp;software&nbsp;is&nbsp;also&nbsp;good,&nbsp;but&nbsp;i&nbsp;found&nbsp;it&nbsp;hard&nbsp;to&nbsp;coregister&nbsp;the&nbsp;anatomy&nbsp;there.&nbsp;I&nbsp;think&nbsp;i'm&nbsp;not&nbsp;properly&nbsp;qualified&nbsp;to&nbsp;give&nbsp;you&nbsp;an&nbsp;answer&nbsp;about&nbsp;the&nbsp;tracts,&nbsp;so&nbsp;i&nbsp;leave&nbsp;it&nbsp;to&nbsp;someone&nbsp;else&nbsp;to&nbsp;answer&nbsp;that,&nbsp;but&nbsp;i&nbsp;would&nbsp;first&nbsp;look&nbsp;at&nbsp;the&nbsp;shimming&nbsp;you&nbsp;are&nbsp;performing&nbsp;on&nbsp;the&nbsp;region&nbsp;you&nbsp;are&nbsp;studying,&nbsp;and&nbsp;then&nbsp;i&nbsp;would&nbsp;guess&nbsp;there&nbsp;is&nbsp;going&nbsp;to&nbsp;be&nbsp;variability&nbsp;in&nbsp;the&nbsp;tracts&nbsp;that&nbsp;should&nbsp;average&nbsp;out&nbsp;with&nbsp;many&nbsp;samples,&nbsp;i&nbsp;think&nbsp;the&nbsp;averages&nbsp;should&nbsp;only&nbsp;help...&nbsp;Maybe&nbsp;the&nbsp;seeding&nbsp;of&nbsp;the&nbsp;tracts?
&gt;Best,
&gt;
&gt;Salvador
&gt;-----------------------------------------------------------------------------------&nbsp;
&gt;Salvador&nbsp;Castaneda,&nbsp;MD.
&gt;University&nbsp;of&nbsp;Tübingen&nbsp;-&nbsp;Department&nbsp;of&nbsp;Radiology
&gt;Röntgenweg&nbsp;13
&gt;72076&nbsp;Tübingen
&gt;Germany
&gt;&nbsp;
&gt;Office:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;+49&nbsp;(7071)&nbsp;29-82977
&gt;Fax:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;+49&nbsp;(7071)&nbsp;29-4451
&gt;E-mail:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Salvador.Castaneda@med.uni.tuebingen.de
&gt;Web:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;www.preclinicalimaging.org&nbsp;
&gt;
&gt;
&gt;-----Ursprüngliche&nbsp;Nachricht-----
&gt;Von:&nbsp;mristudio-users-bounces@mristudio.org&nbsp;[mailto:mristudio-users-bounces@mristudio.org]&nbsp;Im&nbsp;Auftrag&nbsp;von&nbsp;Jacquie&nbsp;Hodge
&gt;Gesendet:&nbsp;Mittwoch,&nbsp;25.&nbsp;Mai&nbsp;2011&nbsp;22:21
&gt;An:&nbsp;mristudio-users@mristudio.org
&gt;Betreff:&nbsp;[Mristudio-users]&nbsp;Theory_Air
&gt;
&gt;Hi&nbsp;everyone,
&gt;
&gt;I&nbsp;receive&nbsp;my&nbsp;DTI&nbsp;images&nbsp;as&nbsp;6&nbsp;directions&nbsp;with&nbsp;6&nbsp;repeats.&nbsp;Today&nbsp;I&nbsp;tried&nbsp;the&nbsp;Theory_Air&nbsp;registration&nbsp;on&nbsp;a&nbsp;set&nbsp;that&nbsp;I&nbsp;have&nbsp;already&nbsp;done&nbsp;many&nbsp;analysis&nbsp;on&nbsp;and&nbsp;I&nbsp;found&nbsp;that&nbsp;although&nbsp;the&nbsp;fiber&nbsp;statistics&nbsp;stayed&nbsp;generally&nbsp;similar&nbsp;when&nbsp;doing&nbsp;tractography,&nbsp;the&nbsp;FA&nbsp;values&nbsp;were&nbsp;quite&nbsp;different&nbsp;for&nbsp;the&nbsp;tracts..&nbsp;From&nbsp;an&nbsp;average&nbsp;of&nbsp;0.55&nbsp;to&nbsp;0.41&nbsp;when&nbsp;I&nbsp;did&nbsp;the&nbsp;Theory_Air.
&gt;Can&nbsp;someone&nbsp;explain&nbsp;why&nbsp;for&nbsp;me?&nbsp;Should&nbsp;I&nbsp;not&nbsp;be&nbsp;using&nbsp;this&nbsp;with&nbsp;6&nbsp;repeats?
&gt;What&nbsp;I&nbsp;really&nbsp;would&nbsp;like&nbsp;to&nbsp;do&nbsp;is&nbsp;co-register&nbsp;one&nbsp;of&nbsp;my&nbsp;nice&nbsp;anatomical&nbsp;images&nbsp;with&nbsp;the&nbsp;FA&nbsp;or&nbsp;color&nbsp;FA&nbsp;for&nbsp;more&nbsp;accurate&nbsp;placement&nbsp;of&nbsp;my&nbsp;ROI's.
&gt;
&gt;Thanks,
&gt;
&gt;Jacquie
&gt;
&gt;Jacquie&nbsp;Hodge&nbsp;MSc&nbsp;candidate&nbsp;in&nbsp;Neuroscience,&nbsp;BSc
&gt;Neuroscience,&nbsp;University&nbsp;of&nbsp;Calgary
&gt;Research&nbsp;Assistant,&nbsp;Calgary&nbsp;Pediatric&nbsp;Stroke&nbsp;Program
&gt;Alberta&nbsp;Children's&nbsp;Hospital
&gt;2888&nbsp;Shaganappi&nbsp;Trail&nbsp;NW,&nbsp;Calgary,&nbsp;AB,&nbsp;Canada&nbsp;T3B&nbsp;6A8
&gt;Phone:&nbsp;403-955-7733&nbsp;Fax:&nbsp;403-955-2922
&gt;jacquie.hodge@albertahealthservices.ca
&gt;Program&nbsp;website:&nbsp;www.perinatalstroke.com
&gt;
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&gt;
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