[Mristudio-users] cut operation

[Woo, John]

Hi, I've been trying to understand the "cut" operation of defining the
voxels between two ROIs.

 

Each fiber intersects both ROIs.  I can see that
"nSelectFiberStartPoint" and "nSelectFiberEndPoint" determine the
indices of the cut points.  If the fiber intersects each ROI in exactly
one point, I can confirm that these are precisely the points.

 

But if say ROI 1 intersects the fiber in two points, it is not entirely
clear to me which point is chosen.  It seems that sometimes the first is
chosen, sometimes the second.

 

Interestingly, in an attempt to elucidate the process further, I tried
swapping the two ROIs of the cut operation (by altering the ".map"
file).  The resulting fiber depends on the order of the ROIs.  That is,
cut(ROI1,ROI2) does not always equal cut(ROI2,ROI1), although they are
almost identical.

 

Thanks to anyone who can help.

 

-John.

 



The information contained in this e-mail message is intended only for the personal and confidential use of the recipient(s) named above. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.mristudio.org/pipermail/mristudio-users/attachments/20080813/badb3d50/attachment.html