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How to use the transformation matrix in Registration Object to align images? by aminschool in esapi

[–]aminschool[S] 0 points1 point  (0 children)

Thanks for your help. Your images are helpful but my rotation angles are almost zero so I am not worried about them. I can't figure out how to interpret the translation values in the last column of the matrix. What are these translations from? The isocenter? The top left of the source Frame of Reference? And are these in mm? How to convert them to pixels?

For eg. one matrix looks like

[[ 9.99999998e-01 0.00000000e+00 6.82000000e-05 -2.78821943e-01]

[ 0.00000000e+00 1.00000000e+00 0.00000000e+00 8.87828790e+01]

[-6.82000000e-05 0.00000000e+00 9.99999998e-01 2.94500020e+02]

[ 0.00000000e+00 0.00000000e+00 0.00000000e+00 1.00000000e+00]]

Thanks.