No subject

Mon Dec 15 09:51:36 EST 2008

-one as a 3d image
-the other as a frame in a 4d image

I set the spacing and sizes equally (the output mhd headers are =
consistent) and the elements of the point objetc are THE SAME but after =
calling this method the index has different values for the Z component. =
In other words, when computing the same index for 3D and 4D the result =
is different (one pixel difference in Z component) from the same =
coordinates (only changes the dimension of the image). It is also weird =
it does affect only the z component and not the X/Y plane

Any idea why the index is not computed equally?

Cheers
David
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<DIV><FONT face=3DArial size=3D2>Hello,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>I'm having&nbsp;a weird lack of =
accuracy while=20
using this method.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>From a list of physical positions y =
create a set of=20
points and then i use this function to set an index on the image. I do =
it in 2=20
ways:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>-one as a 3d image</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>-the other as a frame in a 4d =
image</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>I set the spacing and sizes equally =
(the output mhd=20
headers are consistent) and the elements of the point objetc are THE =
SAME but=20
after calling this method the index has different values for the Z =
component. In=20
other words, when computing the same index for 3D and 4D the result is =
different=20
(one pixel difference in Z component) from the same coordinates (only =
changes=20
the dimension of the image). It is also weird it does affect only the z=20
component and not the X/Y plane</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Any idea why the index is not computed=20
equally?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Cheers</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>David</FONT></DIV></BODY></HTML>

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