Hi Doug,

Thanks for your reply. There is actually only one label, which was created from the ROI resampled in T1 space. The problem is that the label only has the correct orientation in tkmedit when the resampled ROI is loaded as the main volume. When I load T1.mgz as the main volume, the label orientation is incorrect. Does this make sense? Sorry for being unclear in previous post.

Thanks,

- Tyler

On Mar 15, 2011, at 1:17 PM, Douglas N Greve wrote:

So the difference is that one label was created from the ROI resampled in the T1 space and the other was created from the original ROI volume? If so, then this behavior is as expected. Why not use the first label?

doug

Tyler Blazey wrote:

...

Hi,

I am having a bit of a problem with the orientation of a label produced by mri_cor2label. I have an old analyze ROI that I have converted to a nifti volume and then registered to T1.mgz. When I load the ROI volume in tkmedit , the registration looks fine. The label and T1.mgz are in the same orientation and everything matches up. This occurs whether I load the ROI volume as the aux volume or as the main volume.

I then have tried to run mri_cor2label on the ROI volume in order to convert it to a label. When I look at the label with T1.mgz as the main volume, the z and y axises of the label are flipped and so is the left/right orientation. The strange thing is when I load the ROI volume as the main volume and T1.mgz as the aux volume, the label has the correct orientation. Is there a reason why the label only has the correct orientation when its source volume is used as the main volume? Is there any way I can correct this issue?

I am sorry if any of this is unclear. Thanks in advance for any help. Thanks,

• Tyler

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