+
+ // The "Image Orientation Patient" tag gives the direction cosines
+ // for the rows and columns for the three axes defined above.
+ // Typical axial slices will have a value 1/0/0/0/1/0:
+ // rows increase from left to right,
+ // columns increase from posterior to anterior. This is your everyday
+ // "looking up from the bottom of the head with the eyeballs up" image.
+
+ // The "Image Position Patient" tag gives the coordinates of the first
+ // voxel in the image in the "RAH" coordinate system, relative to some
+ // origin.
+
+ // First, calculate the slice normal from IOP :
+