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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dear Judy/ Rachael,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=FR
style='font-size:10.0pt;font-family:Arial;color:navy'>ADC is 'apparent
diffusion coefficient'. </span></font><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>It is defined for the
three coordinate directions, x,y,z (the space in which the subject was in the
scanner).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Note that mean ADC and mean diffusivity is
not the same (at least if you look at the definition). For mean diffusivity,
the eigenvalues have to be estimated from the tensors. In DTI Studio, you can
get the 'trace diffusivity' which equals 3 times the mean diffusivity.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Best<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Andreas<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
mristudio-users-bounces@mristudio.org [mailto:mristudio-users-bounces@mristudio.org]
<b><span style='font-weight:bold'>On Behalf Of </span></b>Rachael Gonzales<br>
<b><span style='font-weight:bold'>Sent:</span></b> Montag, 15. August 2011
16:32<br>
<b><span style='font-weight:bold'>To:</span></b> DTI Studio, ROI Editor,
DiffeoMap Questions/Support<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Mristudio-users] ADC-Map
Calculation in DTIStudio</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi DTI experts,<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>In DTIStudio, under the DTI map tab there is an ADC Map calculation
available. After the calculation, an ADC map - mean image is
generated, is this the <b><span style='font-weight:bold'>apparent </span></b>or
<b><span style='font-weight:bold'>average</span></b> diffusion
coefficient? <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Thanks,<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Rachael<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<div>
<p class=MsoNormal><font size=3 face=Tahoma><span style='font-size:12.0pt;
font-family:Tahoma'><o:p> </o:p></span></font></p>
</div>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>*****************************************************************************************************************************<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Judy, in DtiStudio, ADC (or also called MD) should be obtained from
"Trace".<br>
<br>
Trace is defined as Dxx+Dyy+Dzz. If you divide it by 3, it becomes<br>
"Average diffusion constant (ADC)" or "Mean diffusivity
(MD)". We like<br>
to use the term "trace" because it has clear mathematical definition<br>
while ADC is also used for "Apparent diffusion constant", which has a<br>
different meaning from "average diffusion constant".<br>
<br>
On Mon, Apr 11, 2011 at 11:58 AM, Judy James <<a
href="mailto:jjames2@umc.edu">jjames2@umc.edu</a>> wrote:<br>
<br>
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Is any one in this group aware of how to calculate ADC maps
from the<o:p></o:p></span></font></p>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>original DWI images in DTI studio - not DTI images, like how to
set the<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>gradient table in such a case?<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Any input/help will be highly appreciated.<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Thank you,<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Judy James "<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>*********************************************************************<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Judy Rose James, Ph.D.<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Clinical Physicist, MR Imaging Division<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Assistant Professor, Department of Radiology<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>University of <st1:place w:st="on"><st1:PlaceName w:st="on">Mississippi</st1:PlaceName>
<st1:PlaceName w:st="on">Medical</st1:PlaceName> <st1:PlaceType w:st="on">Center</st1:PlaceType></st1:place><o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><st1:place w:st="on"><st1:City w:st="on"><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Jackson</span></font></st1:City>,
<st1:State w:st="on">MS</st1:State></st1:place> - 39216<o:p></o:p></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Ph: (601) 984-2585; Pager: (601) 929-2442<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Email: <a href="mailto:jjames2@umc.edu">jjames2@umc.edu</a><o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>*********************************************************************<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>________________________________<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>From: <a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a><o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>[mristudio-users-bounces@mristudio.org] On Behalf Of Jacquie Hodge<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>[Jacquie.Hodge@albertahealthservices.ca]<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Sent: Friday, April 08, 2011 11:56 AM<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>To: <a href="mailto:mristudio-users@mristudio.org">mristudio-users@mristudio.org</a><o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Subject: [Mristudio-users] Fa values<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Good morning everyone,<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I am using DTI studio for my project where I am interested in comparing
the<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>left and right CST's in children who have suffereed injury in that area
and<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>after reading many studies on DTI decided to compare average FA values
of<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>the tracts as one of my variables. However, I have come across this
questino<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>from one of my supervisors and cannot really answer it and am hoping
for<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>your help/expertise.<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Here is goes:<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Is the FA value still a viable measure to look at and use to make a<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>correlation if you are using FA values to pull the white matter tract?
It<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>seems like if the tract is made from FA values then you should not be
able<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>to use the FA as an outcome variable. This question has come up as I<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>presented my research idea and I'm not sure how to answer it. Most
studies<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>that use DTI use FA thresholds to pull the tracts and then also the FA<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>values (eg. mean FA) to make comparisons between the tracts.<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I really hope that my question makes sense as I have found it very hard
to<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>word properly.<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Thank you very much,<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Jacquie<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Jacquie Hodge MSc candidate in Neuroscience, BSc<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Neuroscience, <st1:place w:st="on"><st1:PlaceType w:st="on">University</st1:PlaceType>
of <st1:PlaceName w:st="on">Calgary</st1:PlaceName></st1:place><o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Research Assistant, <st1:City w:st="on"><st1:place w:st="on">Calgary</st1:place></st1:City>
Pediatric Stroke Program<o:p></o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><st1:State w:st="on"><st1:place w:st="on"><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Alberta</span></font></st1:place></st1:State>
Children's Hospital<o:p></o:p></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>2888 Shaganappi Trail NW, <st1:place w:st="on"><st1:City w:st="on">Calgary</st1:City>,
<st1:State w:st="on">AB</st1:State>, <st1:country-region w:st="on">Canada</st1:country-region>
<st1:PostalCode w:st="on">T3B 6A8</st1:PostalCode></st1:place><o:p></o:p></span></font></p>
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<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
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<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
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_______________________________________________<br>
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Unsubscribe, send a blank email to: <a
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<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On Feb 23, 2011, at 4:35 AM, susumu mori wrote:<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Andreas is right.<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>So called ADC (average diffusion constant, apparent diffusion constant)
and MD (mean diffusivity) are obtained by trace/3 (trace divided by 3), while
the trace is (eigenvalue0+eigenvalue1+eigenvalue2).<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>also, axial diffusivity
is same as eigenvalue0 and radial diffusivity is the average of eigenvalue1 and
2 [ (eigenvalue1+eigenvalue2)/2].<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On Wed, Feb 23, 2011 at 8:31 AM, Andreas Buchmann <<a
href="mailto:buchmann2@wisc.edu">buchmann2@wisc.edu</a>> wrote:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Dear Yo,<br>
<br>
I'm using trace diffusivity, which is strongly related to mean diffusivity<br>
(I think, just multiplied with a constant factor, experts correct me if I'm<br>
wrong).<br>
<font color="#888888"><span style='color:#888888'><br>
Andreas</span></font><o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
<br>
-----Original Message-----<br>
From: <a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a><br>
[mailto:<a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a>]
On Behalf Of<o:p></o:p></span></font></p>
</div>
<div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><a href="mailto:107310@ib.k.u-tokyo.ac.jp">107310@ib.k.u-tokyo.ac.jp</a><br>
Sent: Dienstag, 22. Februar 2011 19:36<br>
To: DTI Studio, ROI Editor, DiffeoMap Questions/Support<br>
Subject: Re: [Mristudio-users] radial diffusivity, mean diffusivity<br>
<br>
Dear Andreas, Ryuzo and DTI experts<br>
<br>
<br>
I also try to calculate mean diffusivity.<br>
But in DTI studio, only the radial diffusivity and ADCs can calculate at<br>
the 'Image'-tab with ROI.<br>
<br>
Is there any function to measure mean diffusivity?<br>
Please give me any suggestion.<br>
<br>
Many thanks.<br>
<br>
<br>
YO<br>
<br>
<br>
> Dear Andreas<br>
><br>
><br>
><br>
> Thank you very much for your suggestion. I will try.<br>
><br>
><br>
><br>
> Ryuzo<br>
><br>
><br>
><br>
> From: <a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a><br>
> [mailto:<a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a>]
On Behalf Of Andreas<br>
Buchmann<br>
> Sent: Monday, February 21, 2011 11:03 PM<br>
> To: 'DTI Studio, ROI Editor, DiffeoMap Questions/Support'<br>
> Subject: Re: [Mristudio-users] radial diffusivity, mean diffusivity<br>
><br>
><br>
><br>
> Dear Ryuzo,<br>
><br>
><br>
><br>
> yes, you're on the right track with (1). After the estimation, DTI-<br>
Studio<br>
> appends the images to the list of images you have, and you can see<br>
them<br>
> under the 'Image'-tab and save them with right-click on the image.<br>
><br>
><br>
><br>
> Good luck<br>
><br>
> Andreas<br>
><br>
><br>
><br>
> _____<br>
><br>
> From: <a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a><br>
> [mailto:<a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a>]
On Behalf Of hanaie<br>
> Sent: Montag, 21. Februar 2011 07:46<br>
> To: <a href="mailto:mristudio-users@mristudio.org">mristudio-users@mristudio.org</a><br>
> Subject: [Mristudio-users] radial diffusivity, mean diffusivity<br>
><br>
><br>
><br>
> Dear DTI experts<br>
><br>
><br>
><br>
> How can I do to obtain the radial diffusivity and mean diffusivity in<br>
DTI<br>
> studio?<br>
><br>
><br>
><br>
> 1. In the " Dti Map" tab, clicking "Tensor,
color Map etc" button,<br>
and<br>
> checking the checkboxes "Radial", "Trace"<br>
><br>
><br>
><br>
> 2. After tensor calculation and fiber tracking, if I click
"<br>
statistics"<br>
> button in the "Fiber" tab and<br>
><br>
> I choose the each image and click "go" button in the
another window,<br>
can I<br>
> obtain radial and mean diffusivity?<br>
><br>
><br>
><br>
><br>
><br>
> Please give me any suggestion.<br>
><br>
><br>
><br>
> Many thanks.<br>
><br>
><br>
><br>
> Ryuzo<br>
><br>
><br>
><br>
><br>
> _______________________________________________<br>
> mristudio-users mailing list<br>
> <a href="mailto:mristudio-users@mristudio.org">mristudio-users@mristudio.org</a><br>
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<br>
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