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<DIV><FONT size=2 face=Arial>Hi Dr Mori,</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Thank you very much. Andreia and Xin have helped me
to make it work.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>I have another question. I am wondering if you
have suggestion or software about averaging eigenvectors or tensors. In
other words, if we have, say, DTI dataset of 10 brains, all registered together,
how can we calculate the mean (and variation) of the 10 primary eigenvector
field or calculate the mean (and variation) of the 10 tensor
field?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>Any suggestion is highly appreciated!</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>Yi</FONT></DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=susumu@mri.jhu.edu href="mailto:susumu@mri.jhu.edu">susumu mori</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=yj3@duke.edu
href="mailto:yj3@duke.edu">Yi Jiang</A> ; <A
title=mristudio-users@mristudio.org
href="mailto:mristudio-users@mristudio.org">DTI Studio, ROI Editor, Landmarker
Questions/Support</A> ; <A title=xli16@jhmi.edu
href="mailto:xli16@jhmi.edu">Xin Li</A> ; <A title=afaria1@jhmi.edu
href="mailto:afaria1@jhmi.edu">ANDREIA FARIA</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, August 04, 2009 9:59
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Mristudio-users] how to
save the transformation matrix from alandmarker based transformation</DIV>
<DIV><BR></DIV>
<DIV>Hi Yi,</DIV>
<DIV> </DIV>
<DIV>I believe you can save the matrix. Xin should know how to do it.</DIV>
<DIV>As for the matrix combination, I remember that we discussed about exactly
the same topic in my lab. I thought that answer was Yes, but don't exactly
remember how to do it. Andreia and Xin, do you know how to do
it?<BR><BR></DIV>
<DIV class=gmail_quote>On Tue, Aug 4, 2009 at 4:31 PM, Yi Jiang <SPAN
dir=ltr><<A href="mailto:yj3@duke.edu">yj3@duke.edu</A>></SPAN>
wrote:<BR>
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class=gmail_quote>
<DIV bgcolor="#ffffff">
<DIV><FONT face=Arial>Dear All,</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I have tried to look through the online manual, but
could not find the answer.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I tried to use the landmark based transformation
(translation) from the main menu of the Landmarker window. The result
is pretty good. However, I do not know how to save the transformation
matrix. I tried to click the "save transformation matrix" button in the
subject window. It seems two files was saved (.hdr? and .dat), but the file
sizes were very small.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I also want to combine the transformation matrix from
the landmark based translation with a AIR linear rigid, a AIR linear
affine transformation, and a LDDMM matrix. Can I do that? I do not know
if the transformation matrix from landmark based translation is a AIR
format, or LDDMM raw format, or a LDDMM vtk format, which was asked in the
combine matrix window.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>The last question may be stupid: if there are
defined landmarks in the memory, when I click on AIR linear or multichannel
LDDMM (not from the main menu, but the buttons in the subject window), those
landmarks were not used in transformation, right?</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Thank you very much!</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Best,</FONT></DIV>
<DIV><FONT face=Arial>Yi</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT
face=Arial></FONT> </DIV></DIV><BR>_______________________________________________<BR>Mristudio-users
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