Ref: http://dicom.nema.org/medical/dicom/current/output/chtml/part03/sect_C.7.6.2.html#sect_C.7.6.2.1.1
The Image Orientation (Patient) dicom tag is (0020,0037)
, and is defined as 6 elements: "Ax, Ay, Az, Bx, By, Bz"
.
When described as a 3x3 rotation matrix R
, it's equivalent to:
Ax Bx Cx