Patent ID: 6387100
Filing Date: 2002-05-14
Classification: A61B,Y10T

Abstract:
A position determining arrangement used for finding directions for perforation in bone structure surgery, attachable to a machine with a movable arm, wherein the position determining arrangement is provided with a first plate and a second plate, said first and second plates being substantially transparent to X-ray radiation in an orthogonal direction, and mounted in an orthogonal configuration, said first plate being provided with four round elements, said second plate being mounted on a turnable and tiltable support for attachment to said machine or initially attached, whereby an X-ray magnification factor relating to two orthogonal X-ray radiographs, comprising the four round elements, taken of bone structure is determined when two of said four round elements cover each other in both radiographs, said magnification factor being determined by a distance between two uncovered round elements of said four round elements and dependent on movement of said movable arm.