[Insight-developers] Image Orientation Progress

[Lorensen, William E (Research)]

I think he meant non-orthogonal volumes...

-----Original Message-----
From: Blezek, Daniel J (Research) 
Sent: Thursday, March 10, 2005 2:30 PM
To: Lorensen, William E (Research); Peter Cech; Insight-developers
(E-mail)
Subject: RE: [Insight-developers] Image Orientation Progress


No, MR Scanners can collect slices in any orientation, creating oblique volumes.  If test data is needed, I can contribute oblique slices (1000's of them in fact...).
-dan

-----Original Message-----
From: insight-developers-bounces at itk.org
[mailto:insight-developers-bounces at itk.org]On Behalf Of Lorensen,
William E (Research)
Sent: Thursday, March 10, 2005 11:23 AM
To: Peter Cech; Insight-developers (E-mail)
Subject: RE: [Insight-developers] Image Orientation Progress


Peter,
For non-dicom, oblique volumes would be possible. I believe that dicom volumes cannot be oblique. Gantry tilt can be specified for CT, but that is independent of the direction cosines I believe.

Bill

-----Original Message-----
From: insight-developers-bounces at itk.org
[mailto:insight-developers-bounces at itk.org]On Behalf Of Peter Cech
Sent: Thursday, March 10, 2005 11:11 AM
To: Insight-developers (E-mail)
Subject: Re: [Insight-developers] Image Orientation Progress


On Thu, Mar 10, 2005 at 10:35:16 -0500, Lorensen, William E (Research) wrote:
> I have changed itkGDCMImageIO to populate the direction cosines for
> the row and column and compute the cross product of the row/column to
> produce a 3rd direction cosine.

What about oblique volumes? They might be rare, but if you compute 3rd
direction from slice origins, you can cover both orthogonal and oblique
volumes. Unfortunately I cannot offer test cases as I only have
orthogonal volumes at hand.

Regards,
Peter
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