Position and condition determining arrangement for cross hole at intramedullary nail, has two cameras optically connected to markers by geometrical arrangement of markers to derive three 2-dimensional image coordinates

摘要

The arrangement has markers arranged at respective cameras (8, 11), where the markers are designed as active sources of light. The camera (8) is connected with an object i.e. intramedullary nail (2). One of the markers is freely movable against the camera (8) in a circumferential region of the object. The camera (11) is connected with a tool system. A tool of the tool system is guided to a characteristic i.e. cross hole (3). The cameras are optically connected to the markers by geometrical arrangement of the markers to derive three 2-dimensional image coordinates.