Patent ID: 11911207
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 6:
7. The C-arm registration system as claimed in claim 1, wherein the C-arm registration controller is further configured to:
acquire a target X-ray image illustrative of the X-ray ring marker within a target X-ray projection by the C-arm at a target imaging pose;
derive target 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 target position parameters being definitive of a position of the X-ray ring marker within the target X-ray projection; and
derive a target twist parameter of the X-ray ring marker as a function of the target position parameters and of an illustration of the chirp ring within the target X-ray image, the target twist parameter being definitive of a twist of the X-ray ring marker within the target X-ray projection.