I would need to know the procedure (mathematical calculations) how to calculate the angular displacement (axis x, y and z) of rotated DICOM data. I already know that it is possible to access the image axis directions in RAS coordinate system from the volume, but I would need the direct calculation only out of the DICOM attributes. I also already know that the attribute (0020, 0037) “ImageOrientationPatient” includes the x and y vectors of the image and z can be calculated with the cross product of x and y. Is there also another attribute necessary to calculate the angles?
Thank you in advanced for any help.