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. 2016 Feb 19;43(3):1324–1334. doi: 10.1118/1.4941950

FIG. 9.

FIG. 9.

Comparison of subtracted fluoroscopy frames for two clinical acquisitions (A) and (B) before and after application of the registration algorithm. Motion artifacts can be seen near the orbital and nasal cavities and along the contour of the skull in the unregistered subtractions of (A) and (B).