The orientation code maps the pixel coordinate system I (column) J (row) K (slice) to right-handed coordinate system X Y Z. Characters R (right), L (left), A (anterior), P (posterior), I (inferior), S (superior) identify from direction.
RAI¹, the default orientation², means
- X: patient Right to left
- Y: patient Anterior to posterior
- Z: patient Inferior to superior
Spatial position, orientation and geometry of DICOM series (CT, MR, PET and other IODs) are examined. If the image is recognized as uniform volume, it receives green orientation code in information widget.