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<P>Hi Luis, thanks a lot for answering my question.</P>
<P>Below are the detail of my machine:<BR><BR><EM>1) In what type of machine did you run this code ?</EM></P>
<P>Intel Pentium 4 2.4 GHz<BR><EM>2) What operating system ?</EM></P>
<P>Windows 2000<BR><EM>3) What compiler ?</EM></P>
<P>Microsoft Visual C++ 6.0</P>
<P><EM>4) Did you build it for "Release" ?</EM></P>
<P>No, it was Debug version.<BR></P>
<P>The size of the images are :<BR>- MRI image</P>
<P>Dimension:256, 256, 168</P>
<P>Voxel size(mm): 0.86,0.86, 1.5</P>
<P>The .img file is 21,500 KB</P>
<P><BR>- PET image</P>
<P>Dimension: 128, 128, 94</P>
<P>Voxel size(mm): 2.0, 2.0, 3.0</P>
<P>the .img file is 3,000 KB<BR></P>
<P>Maybe I should try for Release. I ll tell you how it works in Release version.<BR></P>
<P>Thanks again,</P>
<P>.Tanya.<BR><BR>-----------------<BR>Tanya S wrote:<BR>> Dear all,<BR>> <BR>> I would like to start doing registration using ITK. I run the sample: <BR>> ImageRegistration8 for registering two Analyze head images, i.e:<BR>> - MRI image(Dimension:256, 256, 168 and Voxel size(mm): 0.86,0.86, 1.5)<BR>> - PET image(Dimension: 128, 128, 94 and Voxel size(mm): 2.0, 2.0, 3.0)<BR>> <BR>> The registration process takes around 2 hours and 45 minutes with <BR>> non-accurate result :(.<BR>> <BR>> I would like to ask why does it take so long and how to make it faster?<BR>> <BR>> Any hint would be really appreciated.<BR>> <BR>> Best regards,<BR>> .Tanya.<BR>> <BR><BR></P></BLOCKQUOTE></DIV><p>
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