[FEATURE] Include method to fix image orientation #74
Description
Is your feature request related to a problem? Please describe.
The image orientation (RAS, or other) plays an important role when an image registration (normalization) is called.
If one of the image has at least one axis flipped, then the image registration optimization can result poorly. This is mainly critical when a non-linear registration is being placed, which major anatomical structures can be largely affect by the missing orientation (example: the eyes balls can be alongated to the occipital lobe if the orientation in Sagital axis is flipped)
Describe the solution you'd like
It would be important to provide a method in asltk that can verify whether the images placed for registration have a missing orientation issue.
Then, the proposed method can fix the orientation correctly.
Describe alternatives you've considered
Maybe a direct comparison with the image properties (like SimpleITK.GetSpacing() or other) can assist to check the image orientation and then propose a fix.