CPC A61B 6/584 (2013.01) [A61B 6/4441 (2013.01); A61B 6/08 (2013.01); A61B 6/587 (2013.01)] | 20 Claims |
1. A C-arm registration system, comprising:
a X-ray ring marker including a coaxial construction of a chirp ring and a centric ring on an annular base; and
a C-arm registration controller for registering a C-arm to the X-ray ring marker, wherein the C-arm registration controller is configured to:
acquire a baseline X-ray image illustrative of the X-ray ring marker within a baseline X-ray projection by the C-arm at a baseline imaging pose;
derive baseline position parameters of the X-ray ring marker as a function of an illustration of the centric ring within the baseline X-ray image, the baseline position parameters being definitive of a position of the X-ray ring marker within the baseline X-ray projection; and
derive a baseline twist parameter of the X-ray ring marker as a function of the baseline position parameters and of an illustration of the chirp ring within the baseline X-ray image, the baseline twist parameter being definitive of a twist of the X-ray ring marker within the baseline X-ray projection.
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