A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 5/05 (2006.01) A61B 6/00 (2006.01)
Patent
CA 2393101
A C-arm imaging device method and system are provided with position determination means for determining the position of an imaging source and an imaging apparatus, and means for determining a local gravity vector. The device and system may also be provided with a magnetic north sensor. Imaging source focal point displacement due to bending determination means and information storage means are also provided. The apparatus and system is used to determine a position of an imaging source, position of an imaging receptor, a local gravity vector and, if applicable, magnetic field distortion, for each of a plurality of orientations of the C- arm. Imaging source focal point displacement due to bending is determined using the position of the imaging source and the position of the imaging detector in correspondence to the local gravity vector and, if applicable, magnetic field distortion, for each of the plurality of orientations. This information can be stored for use in subsequent interpolation of imaging source focal point displacement based on a specific position of an imaging receptor a specific local gravity vector. Such an apparatus and system facilitates a calibration process, and permits dispensing with one or more calibration plates.
Cyr Martin
Sati Marwan
Cedara Software Corp.
Gowling Lafleur Henderson Llp
LandOfFree
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