Image analysis – Image transformation or preprocessing – Changing the image coordinates
Reexamination Certificate
2006-05-05
2009-11-24
Bali, Vikkram (Department: 2624)
Image analysis
Image transformation or preprocessing
Changing the image coordinates
C382S103000, C382S106000, C382S108000, C382S109000, C382S181000, C382S190000, C382S199000, C382S201000, C382S203000, C382S204000, C382S209000, C382S213000, C382S217000, C382S295000, C382S298000, C348S144000
Reexamination Certificate
active
07623736
ABSTRACT:
A method for determining a translation of a three-dimensional pre-operative image data set to obtain a registration of the three-dimensional image data with a patient positioned in a projection imaging system. In one embodiment the user identifies an initial three-dimensional organ center from projections and extreme contour landmark points of the object on a set of projections. A set of contour points for the image object in each of a plurality of three-dimensional cross-section planes; is obtained and the points projecting nearest to the user-identified landmark points are selected. A three-dimensional grid having a predetermined number of intervals at a predetermined interval spacing centered at the user-identified organ center is defined. The three-dimensional image data contour points as centered onto each grid point are projected for evaluation and selection of the grid point leading to contour points projecting nearest to the user-identified landmark points. This selection leads to the iterative definition of a series of improved estimated three-dimensional organ centers, and associated translation vectors. Registration of a three dimensional image data to the patient positioned in a projection imaging system will allow, among other things, overlay of a visual representation of a pre-operative image object onto a projection image plane that can serve as a visual tool and a surgical navigation aid. In particular, the position and orientation of a medical device can be shown with respect to the three-dimensional image data and thus enable quicker, safer, and less invasive navigation of the medical device to and within an organ of interest.
REFERENCES:
patent: 6084989 (2000-07-01), Eppler
patent: 7358732 (2008-04-01), Van Der Kouwe et al.
patent: 2002/0018588 (2002-02-01), Kusch
patent: WO2005/092198 (2005-06-01), None
Tang T.S.Y (Fiducial Registration from a Single X-Ray Image:A New Technique for Fluoroscopic Guidance and Radiotherapy); pp. 502-511; May 2000.
Bali Vikkram
Bitar Nancy
Harness & Dickey & Pierce P.L.C.
Stereotaxis, Inc.
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