Fluoroscopic image guided orthopaedic surgery system with intraoperative ...

United States Patent

[19]

Barrick

US005772594A

[ii] Patent Number: 5,772,594 [45] Date of Patent: Jun. 30, 1998

[54] FLUOROSCOPIC IMAGE GUIDED

ORTHOPAEDIC SURGERY SYSTEM WITH
INTRAOPERATIVE REGISTRATION

[76] Inventor: Earl F. Barrick, 8904 Gallant Green Dr., McLean, Va. 22102

[21] Appl. No.: 731,504
[22] Filed: Oct. 16, 1996

Related U.S. Application Data

[60] Provisional application No. 60/005,331 Oct. 17, 1995.

[51] Int. CI.6 A61B5/05

[52] U.S. CI 600/407; 606/130; 378/20;

378/205

[58] Field of Search 128/653.1; 606/130;

378/20, 205, 207, 206; 600/407

[56] References Cited

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The present invention is an improved system for allowing an orthopaedic surgeon to salely determine the precise trajectory ol insertion ol a guide pin or screw into an object bone and to check the accuracy ol the procedure using real time leedback. The system uses a C-arm fluoroscope in conjunction with a three-dimensional optical digitizer to provide a real time image ol the drill and object bone on a screen. The system uses light emitting diodes (LEDs) positioned on the C-arm fluoroscope and on the drill and two dimensional image registration ol the object bone to orientate the surgeon. In addition, LEDs are attached to a relerence bar positioned on the object bone. The distinctive pattern formed by the combination ol these elements allows the surgeon to continually observe the progress ol the surgery without necessitating additional x-ray images. A computer software program allows the surgeon to record the position ol the object bone, to correct the parallax ol the C-arm fluoroscope and to relate the position ol the object bone in the two fields by two dimensional image registration to determine the exact relative position ol the object bone seen on the two images.

9 Claims, 3 Drawing Sheets