Hi,Susumu,&nbsp;thank&nbsp;you,&nbsp;I&nbsp;learned&nbsp;more&nbsp;from&nbsp;you,&nbsp;&nbsp;then&nbsp;is&nbsp;my&nbsp;following&nbsp;description&nbsp;correct?<br>if&nbsp;we&nbsp;have&nbsp;two&nbsp;hypothetical&nbsp;“real”&nbsp;tracts&nbsp;with&nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;Fiber1={pixel1,pixel2,pixel3,pixel4,pixel5}<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Fiber2={pixel1,pixel2,pixel3,pixel6,pixel7}<br>generally,&nbsp;the&nbsp;value&nbsp;of&nbsp;FA&nbsp;at&nbsp;pixel3&nbsp;will&nbsp;be&nbsp;decreased&nbsp;&nbsp;because&nbsp;it&nbsp;is&nbsp;a&nbsp;cross&nbsp;point,&nbsp;&nbsp;so,&nbsp;it&nbsp;is&nbsp;possible&nbsp;that&nbsp;&nbsp;the&nbsp;value&nbsp;of&nbsp;FA&nbsp;at&nbsp;pixel3&nbsp;&nbsp;is&nbsp;less&nbsp;than&nbsp;the&nbsp;threshold,&nbsp;&nbsp;in&nbsp;this&nbsp;case,&nbsp;&nbsp;we&nbsp;will&nbsp;not&nbsp;track&nbsp;to&nbsp;pixel&nbsp;3&nbsp;from&nbsp;the&nbsp;seed&nbsp;point,&nbsp;pixel5,&nbsp;thus&nbsp;will&nbsp;generate&nbsp;three&nbsp;parts:<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;streamline1={pixel1,pixel2,pixel3}&nbsp;,&nbsp;&nbsp;seeding&nbsp;from&nbsp;pixel&nbsp;1&nbsp;or&nbsp;2&nbsp;or&nbsp;3<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;streamline2={pixel4,pixel5}&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;seeding&nbsp;from&nbsp;pixel&nbsp;4&nbsp;or&nbsp;5<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;streamline3={pixel6,pixe7}&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;seeding&nbsp;from&nbsp;pixel&nbsp;6&nbsp;or&nbsp;7&nbsp;&nbsp;&nbsp;<br>furthermore,&nbsp;if&nbsp;we&nbsp;slelect&nbsp;seed,&nbsp;pixel&nbsp;1,&nbsp;&nbsp;the&nbsp;principal&nbsp;diffusion&nbsp;direction&nbsp;at&nbsp;the&nbsp;pixel&nbsp;1&nbsp;maybe&nbsp;change&nbsp;too&nbsp;much&nbsp;so&nbsp;as&nbsp;to&nbsp;more&nbsp;than&nbsp;the&nbsp;threshold&nbsp;of&nbsp;angle.<br>Is&nbsp;the&nbsp;above&nbsp;correct?&nbsp;<br><br>2009-03-19，susumu&nbsp;&lt;susumu@mri.jhu.edu&gt;：<br><br>I’m&nbsp;not&nbsp;sure&nbsp;if&nbsp;I&nbsp;understood&nbsp;your&nbsp;question&nbsp;correctly,&nbsp;but&nbsp;let&nbsp;me&nbsp;try.<br>&nbsp;<br>In&nbsp;DtiStudio,&nbsp;fiber&nbsp;tracking&nbsp;is&nbsp;initiated&nbsp;from&nbsp;all&nbsp;pixels&nbsp;in&nbsp;the&nbsp;brain&nbsp;(more&nbsp;precisely&nbsp;pixels&nbsp;with&nbsp;FA&nbsp;above&nbsp;the&nbsp;threshold).&nbsp;Some&nbsp;may&nbsp;think&nbsp;that&nbsp;tracking&nbsp;is&nbsp;initiated&nbsp;from&nbsp;pixels&nbsp;in&nbsp;ROIs,&nbsp;but&nbsp;that&nbsp;is&nbsp;not&nbsp;the&nbsp;case.&nbsp;We&nbsp;draw&nbsp;ROIs&nbsp;just&nbsp;to&nbsp;retrieve&nbsp;fiber&nbsp;tracking&nbsp;results&nbsp;that&nbsp;penetrate&nbsp;the&nbsp;ROIs.&nbsp;<br>&nbsp;<br>For&nbsp;the&nbsp;first&nbsp;case&nbsp;of&nbsp;your&nbsp;fibers,&nbsp;ROI&nbsp;could&nbsp;be&nbsp;Pixel2&nbsp;and&nbsp;for&nbsp;the&nbsp;Fiber&nbsp;#1,&nbsp;the&nbsp;seed&nbsp;pixel&nbsp;could&nbsp;be&nbsp;Pixel#5&nbsp;and&nbsp;for&nbsp;the&nbsp;Fiber&nbsp;#2,&nbsp;the&nbsp;seed&nbsp;pixel&nbsp;could&nbsp;be&nbsp;Pixel#7.&nbsp;So,&nbsp;it’s&nbsp;possible.<br>&nbsp;<br>The&nbsp;Case&nbsp;2&nbsp;and&nbsp;Case&nbsp;3&nbsp;seem&nbsp;not&nbsp;possible&nbsp;because&nbsp;there&nbsp;is&nbsp;no&nbsp;common&nbsp;pixel&nbsp;as&nbsp;your&nbsp;ROI&nbsp;location.<br>&nbsp;<br>Also,&nbsp;suppose&nbsp;we&nbsp;have&nbsp;hypothetical&nbsp;“real”&nbsp;tract&nbsp;with&nbsp;Fiber1={pixel1,pixel2,pixel3,pixel4,pixel5}<br>&nbsp;<br>Then&nbsp;we&nbsp;may&nbsp;get&nbsp;5&nbsp;streamlines&nbsp;after&nbsp;fiber&nbsp;tracking;&nbsp;one&nbsp;seeded&nbsp;from&nbsp;Pixel#1,&nbsp;one&nbsp;from&nbsp;Pixel#2,,,,&nbsp;one&nbsp;from&nbsp;Pixel#5.&nbsp;These&nbsp;5&nbsp;streamlines&nbsp;have&nbsp;slightly&nbsp;different&nbsp;coordinates&nbsp;because&nbsp;each&nbsp;tracking&nbsp;starts&nbsp;from&nbsp;the&nbsp;center&nbsp;of&nbsp;each&nbsp;pixel&nbsp;and&nbsp;tracking&nbsp;takes&nbsp;place&nbsp;in&nbsp;floating&nbsp;number&nbsp;coordinates.&nbsp;For&nbsp;quantification,&nbsp;the&nbsp;streamline&nbsp;information&nbsp;is&nbsp;often&nbsp;converted&nbsp;to&nbsp;pixel-by-pixel&nbsp;information.&nbsp;After&nbsp;this&nbsp;conversion,&nbsp;the&nbsp;5&nbsp;floating-point&nbsp;streamlines&nbsp;may&nbsp;converted&nbsp;to&nbsp;the&nbsp;identical&nbsp;string&nbsp;of&nbsp;pixels,&nbsp;which&nbsp;is&nbsp;in&nbsp;this&nbsp;case,&nbsp;&nbsp;Fiber1={pixel1,pixel2,pixel3,pixel4,pixel5}.<br>&nbsp;<br>In&nbsp;reality,&nbsp;these&nbsp;5&nbsp;streamlines&nbsp;often&nbsp;start&nbsp;to&nbsp;diverge&nbsp;at&nbsp;the&nbsp;peripheral&nbsp;regions&nbsp;while&nbsp;the&nbsp;core&nbsp;areas&nbsp;are&nbsp;likely&nbsp;to&nbsp;share&nbsp;many&nbsp;pixels.<br><br><br><br>From:&nbsp;mristudio-users-bounces@mristudio.org&nbsp;[mailto:mristudio-users-bounces@mristudio.org]&nbsp;On&nbsp;Behalf&nbsp;Of&nbsp;vikey.han<br>Sent:&nbsp;Thursday,&nbsp;March&nbsp;19,&nbsp;2009&nbsp;6:00&nbsp;AM<br>To:&nbsp;DTI&nbsp;Studio&nbsp;ROI&nbsp;Editor&nbsp;Landmarker&nbsp;Questions/Support<br>Subject:&nbsp;Re:&nbsp;[Mristudio-users]&nbsp;Extract&nbsp;values&nbsp;of&nbsp;the&nbsp;Fiber&nbsp;tract&nbsp;ROI<br>&nbsp;<br>Then&nbsp;I&nbsp;have&nbsp;a&nbsp;question,&nbsp;&nbsp;if&nbsp;the&nbsp;two&nbsp;or&nbsp;more&nbsp;fibers&nbsp;share&nbsp;the&nbsp;same&nbsp;sequence&nbsp;of&nbsp;pixels,&nbsp;how&nbsp;does&nbsp;DTIsutio&nbsp;represent&nbsp;the&nbsp;fibers&nbsp;tracked,&nbsp;for&nbsp;example,&nbsp;<br>Fiber1={pixel1,pixel2,pixel3,pixel4,pixel5}<br>Fiber2={pixel1,pixel2,pixel3,pixel6,pixel7}<br>then&nbsp;whether&nbsp;the&nbsp;fiber1&nbsp;and&nbsp;fiber1&nbsp;have&nbsp;the&nbsp;same&nbsp;data&nbsp;structure&nbsp;as&nbsp;the&nbsp;above,&nbsp;or&nbsp;<br>Fiber1={pixel1,pixel2,pixel3,pixel4,pixel5}<br>Fiber2={pixel6,pixel7}<br>or&nbsp;maybe&nbsp;DTIStudio&nbsp;generates&nbsp;three&nbsp;fibers:<br>Fiber1={pixel1,pixel2,pixel3}<br>Fiber2={pixel6,pixel7}<br>Fiber3={pixel4,pixel5}<br>Is&nbsp;it&nbsp;possible&nbsp;that&nbsp;the&nbsp;last&nbsp;two&nbsp;cases&nbsp;happening?<br>&nbsp;<br>2009-03-17，susumu&nbsp;&lt;susumu@mri.jhu.edu&gt;&nbsp;：<br>&gt;Dear&nbsp;Users,<br>&gt;&nbsp;<br>&gt;Javier&nbsp;raised&nbsp;an&nbsp;important&nbsp;issue&nbsp;and&nbsp;I&nbsp;want&nbsp;to&nbsp;share&nbsp;his&nbsp;results&nbsp;with&nbsp;all&nbsp;of<br>&gt;you.<br>&gt;&nbsp;<br>&gt;Here&nbsp;is&nbsp;what&nbsp;he&nbsp;did;<br>&gt;&nbsp;<br>&gt;1)&nbsp;Did&nbsp;fiber&nbsp;tracking&nbsp;using&nbsp;DtiStudio,&nbsp;use&nbsp;the&nbsp;"statistics"&nbsp;button,&nbsp;and&nbsp;get<br>&gt;an&nbsp;FA&nbsp;value&nbsp;of&nbsp;the&nbsp;entire&nbsp;reconstructed&nbsp;fiber.<br>&gt;2)&nbsp;Save&nbsp;the&nbsp;fiber&nbsp;tracking&nbsp;results&nbsp;as&nbsp;1/0&nbsp;binary&nbsp;image,&nbsp;load&nbsp;the&nbsp;file&nbsp;to<br>&gt;RoiEditor,&nbsp;superimpose&nbsp;the&nbsp;binary&nbsp;masking&nbsp;on&nbsp;the&nbsp;FA&nbsp;map,&nbsp;and&nbsp;get&nbsp;an&nbsp;FA&nbsp;value<br>&gt;of&nbsp;the&nbsp;entire&nbsp;reconstructed&nbsp;fiber<br>&gt;&nbsp;<br>&gt;The&nbsp;results&nbsp;were&nbsp;different&nbsp;as&nbsp;indicated&nbsp;in&nbsp;his&nbsp;email.<br>&gt;&nbsp;<br>&gt;This&nbsp;is&nbsp;because&nbsp;the&nbsp;ways&nbsp;FA&nbsp;is&nbsp;measured&nbsp;for&nbsp;the&nbsp;reconstructed&nbsp;tracts&nbsp;are<br>&gt;fundamentally&nbsp;different&nbsp;between&nbsp;the&nbsp;two&nbsp;programs.<br>&gt;&nbsp;<br>&gt;DtiStudio:<br>&gt;&nbsp;<br>&gt;Suppose&nbsp;you&nbsp;have&nbsp;two&nbsp;fibers.&nbsp;One&nbsp;is&nbsp;10-pixel&nbsp;long&nbsp;and&nbsp;the&nbsp;other&nbsp;is&nbsp;5-pixel<br>&gt;long.&nbsp;Also&nbsp;suppose&nbsp;that&nbsp;the&nbsp;second&nbsp;5-pixel&nbsp;fiber&nbsp;shares&nbsp;the&nbsp;same&nbsp;5&nbsp;pixels<br>&gt;within&nbsp;the&nbsp;first&nbsp;10-pixel&nbsp;fiber.&nbsp;This&nbsp;means,&nbsp;the&nbsp;second&nbsp;fiber&nbsp;is&nbsp;completely<br>&gt;contained&nbsp;within&nbsp;the&nbsp;first&nbsp;fiber.<br>&gt;&nbsp;<br>&gt;In&nbsp;DtiStudio,&nbsp;FA&nbsp;is&nbsp;measured&nbsp;along&nbsp;the&nbsp;first&nbsp;fiber.&nbsp;It&nbsp;also&nbsp;measures&nbsp;FA<br>&gt;along&nbsp;the&nbsp;second&nbsp;fiber.&nbsp;The&nbsp;end&nbsp;result&nbsp;is,&nbsp;for&nbsp;example;<br>&gt;&nbsp;<br>&gt;First&nbsp;fiber&nbsp;[0.2,&nbsp;0.25,&nbsp;0.3,&nbsp;0.35,&nbsp;0.4,&nbsp;0.45,&nbsp;0.5,&nbsp;0.55,&nbsp;0.6,&nbsp;0.65]<br>&gt;Second&nbsp;[0.2,&nbsp;0.25,&nbsp;0.3,&nbsp;0.35,&nbsp;0.4]<br>&gt;&nbsp;<br>&gt;As&nbsp;you&nbsp;can&nbsp;see,&nbsp;the&nbsp;first&nbsp;5&nbsp;pixels&nbsp;are&nbsp;identical.&nbsp;Then&nbsp;DtiStudio&nbsp;calculates<br>&gt;the&nbsp;average&nbsp;of&nbsp;the&nbsp;15&nbsp;pixels.&nbsp;This&nbsp;means,&nbsp;the&nbsp;first&nbsp;5&nbsp;pixels&nbsp;are<br>&gt;"double-counted".&nbsp;<br>&gt;&nbsp;<br>&gt;In&nbsp;this&nbsp;way,&nbsp;DtiStudio&nbsp;provides&nbsp;natural&nbsp;weighting&nbsp;for&nbsp;pixels&nbsp;that&nbsp;contain<br>&gt;more&nbsp;fibers.&nbsp;In&nbsp;reality,&nbsp;some&nbsp;pixels&nbsp;may&nbsp;contains&nbsp;10s&nbsp;of&nbsp;fibers<br>&gt;(reconstructed&nbsp;streamlines)&nbsp;while&nbsp;some&nbsp;pixels&nbsp;may&nbsp;contain&nbsp;only&nbsp;one&nbsp;fiber.<br>&gt;The&nbsp;more&nbsp;fibers&nbsp;a&nbsp;pixel&nbsp;contains,&nbsp;more&nbsp;weighting&nbsp;it&nbsp;receives,&nbsp;because&nbsp;it<br>&gt;would&nbsp;be&nbsp;counted&nbsp;many&nbsp;more&nbsp;times.<br>&gt;&nbsp;<br>&gt;RoiEditor:<br>&gt;&nbsp;<br>&gt;Once&nbsp;you&nbsp;save&nbsp;the&nbsp;fiber&nbsp;tracking&nbsp;result&nbsp;into&nbsp;1/0&nbsp;binary&nbsp;information,&nbsp;all&nbsp;the<br>&gt;streamline&nbsp;information&nbsp;is&nbsp;lost,&nbsp;so&nbsp;as&nbsp;the&nbsp;number&nbsp;of&nbsp;fibers&nbsp;each&nbsp;pixel<br>&gt;contains.&nbsp;In&nbsp;RoiEditor,&nbsp;the&nbsp;binary&nbsp;image&nbsp;can&nbsp;be&nbsp;read&nbsp;and&nbsp;applied&nbsp;to&nbsp;an&nbsp;FA<br>&gt;map&nbsp;as&nbsp;a&nbsp;non-weighted&nbsp;binary&nbsp;masking.&nbsp;<br>&gt;&nbsp;<br>&gt;I&nbsp;hope&nbsp;this&nbsp;explains&nbsp;the&nbsp;difference&nbsp;among&nbsp;the&nbsp;two&nbsp;methods.&nbsp;Because&nbsp;DtiStudio<br>&gt;counts&nbsp;the&nbsp;core&nbsp;white&nbsp;matter&nbsp;regions&nbsp;many&nbsp;more&nbsp;times&nbsp;than&nbsp;peripheral&nbsp;areas,<br>&gt;the&nbsp;average&nbsp;FA&nbsp;values&nbsp;tend&nbsp;to&nbsp;be&nbsp;higher.<br>&gt;&nbsp;<br>&gt;There&nbsp;is&nbsp;nothing&nbsp;like&nbsp;one&nbsp;is&nbsp;better&nbsp;than&nbsp;the&nbsp;other.&nbsp;They&nbsp;are&nbsp;just&nbsp;two<br>&gt;different&nbsp;approaches.&nbsp;Maybe&nbsp;the&nbsp;natural&nbsp;weighting&nbsp;may&nbsp;sound&nbsp;more&nbsp;reasonable<br>&gt;but&nbsp;the&nbsp;non-weighting&nbsp;1/0&nbsp;masking&nbsp;should&nbsp;also&nbsp;be&nbsp;a&nbsp;valid&nbsp;approach.&nbsp;You&nbsp;just<br>&gt;need&nbsp;to&nbsp;apply&nbsp;the&nbsp;same&nbsp;method&nbsp;(or&nbsp;both&nbsp;methods)&nbsp;to&nbsp;all&nbsp;data.&nbsp;<br>&gt;&nbsp;<br>&gt;Please&nbsp;let&nbsp;us&nbsp;know&nbsp;if&nbsp;you&nbsp;have&nbsp;any&nbsp;questions&nbsp;regarding&nbsp;this&nbsp;issue.<br>&gt;&nbsp;<br>&gt;Thanks,<br>&gt;&nbsp;<br>&gt;Susumu<br>&gt;&nbsp;<br>&gt;&nbsp;<br>&gt;&nbsp;<br>&gt;________________________________________<br>&gt;From:&nbsp;Javier&nbsp;Navas&nbsp;[mailto:fjnavas2@gmail.com]&nbsp;<br>&gt;Sent:&nbsp;Tuesday,&nbsp;March&nbsp;17,&nbsp;2009&nbsp;6:55&nbsp;AM<br>&gt;To:&nbsp;susumu@mri.jhu.edu;&nbsp;DTI&nbsp;Studio,&nbsp;ROI&nbsp;Editor,&nbsp;Landmarker&nbsp;Questions/Support<br>&gt;Subject:&nbsp;[Mristudio-users]&nbsp;Extract&nbsp;values&nbsp;of&nbsp;the&nbsp;Fiber&nbsp;tract&nbsp;ROI<br>&gt;&nbsp;<br>&gt;&nbsp;<br>&gt;Thank&nbsp;you&nbsp;very&nbsp;much&nbsp;Mr.&nbsp;Susumu,<br>&gt;&nbsp;<br>&gt;with&nbsp;ROI&nbsp;editor&nbsp;I&nbsp;can&nbsp;extract&nbsp;the&nbsp;pixel&nbsp;values&nbsp;in&nbsp;a&nbsp;txt&nbsp;file,&nbsp;that&nbsp;is&nbsp;what&nbsp;I<br>&gt;want,&nbsp;thank&nbsp;you.&nbsp;<br>&gt;&nbsp;<br>&gt;But&nbsp;I&nbsp;have&nbsp;a&nbsp;problem.&nbsp;The&nbsp;FA&nbsp;mean&nbsp;value&nbsp;that&nbsp;results&nbsp;in&nbsp;DTI&nbsp;Studio&nbsp;is<br>&gt;different&nbsp;that&nbsp;the&nbsp;FA&nbsp;mean&nbsp;value&nbsp;that&nbsp;results&nbsp;in&nbsp;ROI&nbsp;editor,&nbsp;with&nbsp;the&nbsp;same<br>&gt;binary&nbsp;image,&nbsp;why&nbsp;occur&nbsp;this?.&nbsp;<br>&gt;&nbsp;<br>&gt;For&nbsp;example,&nbsp;with&nbsp;the&nbsp;same&nbsp;mask&nbsp;of&nbsp;the&nbsp;genu&nbsp;of&nbsp;corpus&nbsp;callosum,&nbsp;I&nbsp;have&nbsp;the<br>&gt;same&nbsp;number&nbsp;of&nbsp;pixels&nbsp;(2835&nbsp;pixels)&nbsp;but&nbsp;the&nbsp;FA&nbsp;statistics&nbsp;is&nbsp;different.&nbsp;<br>&gt;&nbsp;<br>&gt;DTI&nbsp;studio:&nbsp;<br>&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;FA<br>&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Max.&nbsp;of&nbsp;ImgVal:&nbsp;&nbsp;&nbsp;0.9690<br>&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Min.&nbsp;of&nbsp;ImgVal:&nbsp;&nbsp;&nbsp;0.0591<br>&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Mean&nbsp;of&nbsp;ImgVal:&nbsp;&nbsp;&nbsp;0.5385<br>&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Std.&nbsp;of&nbsp;ImgVal:&nbsp;&nbsp;&nbsp;0.1689&nbsp;<br>&gt;&nbsp;<br>&gt;ROI&nbsp;editor:<br>&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Min:&nbsp;&nbsp;&nbsp;&nbsp;0.06<br>&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Max:&nbsp;&nbsp;&nbsp;&nbsp;0.97<br>&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Mean:&nbsp;&nbsp;&nbsp;&nbsp;0.45<br>&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Std:&nbsp;&nbsp;&nbsp;&nbsp;0.17<br>&gt;&nbsp;<br>&gt;________________________________________<br>&gt;From:&nbsp;mristudio-users-bounces@mristudio.org<br>&gt;[mailto:mristudio-users-bounces@mristudio.org]&nbsp;On&nbsp;Behalf&nbsp;Of&nbsp;Javier&nbsp;Navas<br>&gt;Sent:&nbsp;Thursday,&nbsp;March&nbsp;12,&nbsp;2009&nbsp;8:33&nbsp;PM<br>&gt;To:&nbsp;DTI&nbsp;Studio,&nbsp;ROI&nbsp;Editor,&nbsp;Landmarker&nbsp;Questions/Support<br>&gt;Subject:&nbsp;Re:&nbsp;[Mristudio-users]&nbsp;Extract&nbsp;values&nbsp;of&nbsp;the&nbsp;Fiber&nbsp;tract&nbsp;ROI<br>&gt;&nbsp;<br>&gt;Hi&nbsp;Susumu,<br>&gt;&nbsp;<br>&gt;I`m&nbsp;talking&nbsp;about&nbsp;the&nbsp;statistics&nbsp;of&nbsp;the&nbsp;fiber&nbsp;tracking&nbsp;results&nbsp;as&nbsp;an&nbsp;ROI.&nbsp;I<br>&gt;want&nbsp;to&nbsp;extract&nbsp;all&nbsp;the&nbsp;voxels&nbsp;values&nbsp;in&nbsp;the&nbsp;FA&nbsp;map&nbsp;that&nbsp;are&nbsp;included&nbsp;in&nbsp;the<br>&gt;corpus&nbsp;callusum&nbsp;tract&nbsp;to&nbsp;a&nbsp;text&nbsp;file.&nbsp;I&nbsp;don`t&nbsp;want&nbsp;only&nbsp;the&nbsp;mean&nbsp;or&nbsp;the<br>&gt;max/minimum&nbsp;value.&nbsp;Becouse&nbsp;I&nbsp;want&nbsp;to&nbsp;do&nbsp;a&nbsp;parcellation&nbsp;of&nbsp;the&nbsp;corpus<br>&gt;callosum&nbsp;and&nbsp;do&nbsp;a&nbsp;correlation&nbsp;of&nbsp;this&nbsp;values&nbsp;with&nbsp;the&nbsp;age&nbsp;or&nbsp;the&nbsp;IQ&nbsp;of&nbsp;the<br>&gt;pacients.<br>&gt;&nbsp;<br>&gt;I´m&nbsp;working&nbsp;with&nbsp;the&nbsp;software&nbsp;some&nbsp;months&nbsp;ago,&nbsp;and&nbsp;I`m&nbsp;new&nbsp;in&nbsp;the&nbsp;list.&nbsp;This<br>&gt;is&nbsp;my&nbsp;first&nbsp;message.&nbsp;Thank&nbsp;you&nbsp;for&nbsp;your&nbsp;answer.<br>&gt;&nbsp;<br>&gt;2009/3/13&nbsp;susumu&nbsp;&lt;susumu@mri.jhu.edu&gt;<br>&gt;Hi&nbsp;Javier,<br>&gt;&nbsp;<br>&gt;Are&nbsp;you&nbsp;talking&nbsp;about&nbsp;the&nbsp;statistics&nbsp;of&nbsp;the&nbsp;ROI&nbsp;you&nbsp;drew&nbsp;or&nbsp;using&nbsp;the&nbsp;fiber<br>&gt;tracking&nbsp;results&nbsp;as&nbsp;an&nbsp;ROI?<br>&gt;&nbsp;<br>&gt;Susumu<br>&gt;&nbsp;<br>&gt;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br>&gt;To&nbsp;unsubscribe&nbsp;this&nbsp;mailing&nbsp;list,&nbsp;please&nbsp;go&nbsp;to&nbsp;www.mristudio.org&nbsp;/&nbsp;Mailing<br>&gt;List&nbsp;/&nbsp;Mristudio-users.&nbsp;There&nbsp;you&nbsp;can&nbsp;find&nbsp;the&nbsp;unsubscribe&nbsp;option.<br>&gt;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br>&gt;&nbsp;<br>&gt;&nbsp;<br>&gt;________________________________________<br>&gt;From:&nbsp;mristudio-users-bounces@mristudio.org<br>&gt;[mailto:mristudio-users-bounces@mristudio.org]&nbsp;On&nbsp;Behalf&nbsp;Of&nbsp;Javier&nbsp;Navas<br>&gt;Sent:&nbsp;Wednesday,&nbsp;March&nbsp;11,&nbsp;2009&nbsp;8:15&nbsp;AM<br>&gt;To:&nbsp;mristudio-users@mristudio.org<br>&gt;Subject:&nbsp;[Mristudio-users]&nbsp;Extract&nbsp;values&nbsp;of&nbsp;the&nbsp;Fiber&nbsp;tract&nbsp;ROI<br>&gt;&nbsp;<br>&gt;Dear&nbsp;all,<br>&gt;&nbsp;<br>&gt;I`m&nbsp;working&nbsp;in&nbsp;Fiber&nbsp;Tracking&nbsp;of&nbsp;the&nbsp;corpus&nbsp;callosum&nbsp;with&nbsp;DTIstudio,<br>&gt;&nbsp;<br>&gt;I&nbsp;want&nbsp;to&nbsp;extract&nbsp;the&nbsp;values&nbsp;of&nbsp;my&nbsp;ROI&nbsp;(the&nbsp;statistics&nbsp;with&nbsp;the&nbsp;number&nbsp;of<br>&gt;fibers&nbsp;selected,&nbsp;length&nbsp;of&nbsp;fibers,&nbsp;FA&nbsp;values...)&nbsp;to&nbsp;a&nbsp;text&nbsp;file&nbsp;or&nbsp;SPSS<br>&gt;archive,&nbsp;but&nbsp;I&nbsp;don`t&nbsp;know&nbsp;how&nbsp;can&nbsp;I&nbsp;do&nbsp;it.<br>&gt;&nbsp;<br>&gt;&nbsp;<br>&gt;Thank&nbsp;you&nbsp;for&nbsp;help&nbsp;me,<br>&gt;&nbsp;<br>&gt;Javier&nbsp;<br>&gt;&nbsp;<br>&gt;_______________________________________________<br>&gt;Mristudio-users&nbsp;mailing&nbsp;list<br>&gt;Mristudio-users@mristudio.org<br>&gt;http://lists.mristudio.org/mailman/listinfo/mristudio-users<br>&gt;&nbsp;<br>&gt;&nbsp;<br>&gt;&nbsp;<br>&gt;_______________________________________________<br>&gt;Mristudio-users&nbsp;mailing&nbsp;list<br>&gt;Mristudio-users@mristudio.org<br>&gt;http://lists.mristudio.org/mailman/listinfo/mristudio-users<br><br><br><br><br><br><br><br>网易邮箱，中国第一大电子邮件服务商&nbsp;<br><!-- footer --><br><span title="neteasefooter"/><hr/>
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