The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 2017
Filed:
Apr. 12, 2013
University of Florida Research Foundation, Inc., Gainesville, FL (US);
Guanghua Yan, Gainesville, FL (US);
Bo Lu, Gainesville, FL (US);
Chihray Liu, Gainesville, FL (US);
Jonathan G. Li, Gainesville, FL (US);
Unitversity of Florida Research Foundation, Inc., Gainesville, FL (US);
Abstract
An ambiguity-free optical tracking system () includes a position sensor unit (), a control box (), a computer () and software. The position sensor unit includes two cameras (and) that track a plurality of individual infra-red reflecting markers () affixed on a patient's skin. Coordinates of the cameras in a coordinate system of the cameras are determined as part of a system calibration process by intentionally creating ambiguous markers with two true markers. Using this information, an ambiguity elimination algorithm automatically identifies and eliminates ambiguous markers. A recursive backtracking algorithm builds a one-to-one correspondence between reference markers and markers optically observed during treatment. By utilizing a concept of null markers, the backtracking algorithm deals with missing, misplaced and occluded markers.