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. Author manuscript; available in PMC: 2011 May 7.
Published in final edited form as: Med Phys. 2011 Mar;38(3):1491–1502. doi: 10.1118/1.3553403

Fig. 3.

Fig. 3

Plots of mean, standard deviation, and median mTREs of registrations of CBCT big FOV, CBCT small FOV, and CT images to kV and MV x-ray images with and without a ROI for the intensity-based method using four different merit functions (CC, RC, CR, and MI) and the gradient-based BGB and RGB methods. All registrations were considered for the calculation of accuracy statistics.