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US 6,387,100 B1Granted
Method and arrangement for position determining of bone structure
AssigneeMedical Robotics i Stockholm AB
InventorStig Lindequist
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AssigneeMedical Robotics i Stockholm AB
InventorStig Lindequist
Estimating the term…
A positioning determining arrangement used for finding directions for perforations in bone structure surgery is attachable to a machine with a movable arm. The arrangement is provided with a first plate and a second plate, the first and second plates are substantially transparent to X-ray radiation in an orthogonal direction. The first and second plates are mounted in an orthogonal configuration and the first plate is provided with four round elements. The second plate can be mounted to a turnable and tiltable support for attachment t a machine. In this arrangement the X-ray magnification factor relating to two orthogonal X-ray radiographs, comprising the four round elements, taken of a bone structure is determined when two of the four round elements cover each other in both radiographs, the magnification factor being determined by a distance between two uncovered round elements of the four round elements and dependent on movement of the arm.
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.
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, both plates being substantially transparent to X-ray radiation in an orthogonal direction, and mounted in an orthogonal configuration, said first plate consisting essentially of four elements, whereby an X-ray magnification factor relating to two orthogonal X-ray radiographs, comprising the four elements, taken of bone structure is determined when two of said four elements cover each other in both radiographs, said magnification factor being determined by a distance between two uncovered elements and dependent on movement of said movable arm.
A position determining arrangement forbone 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 substantially transparent to X-ray radiation in an orthogonal direction and mounted in an orthogonal configuration, said first plate including a plurality of elements provided to determine relative bone structure position, said second plate being mounted on a support for attachment to said machine, said support being selectively rotatable about a first axis substantially perpendicular to said second plate and about a second axis perpendicular to the first axis.
Dependencies are inferred from the claim text.