[Insight-users] Image Directions

[Bill Lorensen]

I would not use ITK_COORDINATE_ORIENTATION_LAI nor the orient image
filter. ITK operations on image should properly treat the dicom image
direction.

On Thu, Apr 14, 2011 at 4:33 PM, paniwani <paniwani at gmail.com> wrote:
> I have a few questions about orienting images. I have several CT datasets
> both prone and supine. In order to do some colon segmentation I reorient so
> that the lung is closest to slice 0 and the spine is at the top of the
> image. This is done using the orient image filter in ITK with the
> ITK_COORDINATE_ORIENTATION_LAI code.
>
> Does changing this orientation directly change the image direction cosines?
> Are spatial orientation codes and direction cosines just two ways of saying
> the same thing?
>
> If after orienting the image in this way, I want to allocate new helper
> images, should I set their directions to the input's direction? Is the
> default image direction of an allocated image the identity matrix?
>
> Thanks in advance.
>
> Neil
>
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