Patent ID: 9082177
Filing Date: 2015-07-14
Classification: A61B,G06T

Abstract:
1. A method of associating marker projections with radiopaque markers affixed to a patient, the method executed by an imaging system including a scanner, a computer with an electronic processing unit, and a memory module storing a module executable by the electronic processing unit, the method comprising: generating, with the scanner, a sequence of computer tomography projection frames comprising at least a first projection frame, wherein the first projection frame includes a first marker projection; determining, with the electronic processing unit, an approximate 3D physical location in relation to the scanner of a first radiopaque marker affixed to a patient; based at least on the approximate 3D physical location of the first radiopaque marker, calculating, with the electronic processing unit, a first expected marker projection location in the first projection frame, wherein the first marker projection and the first expected marker projection location are separated from each other by a first distance in at least one dimension; based at least on the first distance being within an expected range, determining, with the electronic processing unit, that the first marker projection is a projection of the first radiopaque marker; and correcting for patient motion based at least on determining that the first marker projection is a projection of the first radiopaque marker.