Brainlab Ag

Martin Haimerl

Mario Schubert

Gregor Tuma

Florian Schindler

Lars Dohmen

Melanie Wegner

Sabine Gneiting

Marc Fricke

Johannes Manus

Michael Bertram

Oliver Fleig

Robert Essenreiter

Thomas Drexl

Sabine Kling

Frank Grünschläger

Markus Hepke

Ralf Schwitzko

Martin Haberl

Heiko Müller

Frank Gruenschlaeger

Provided is a method for determining a position of an imaged anatomical body part of a patient. The method includes acquiring patient image data describing a digital image of at least part of a reference device and the anatomical body part, acquiring reference device model data describing a model of at least one of at least one internal surface or at least one external surface of the reference device, determining, &#x2014;based on the patient image data and the reference device model data, reference device image position data describing a relative position between the reference device and the anatomical body part, acquiring reference device tracking data describing a position of the reference device in the tracking reference system, and determining, based on the reference device image position data and the reference device tracking data, body part tracking data describing a position of the anatomical body part in the tracking reference system.

Automatic image registration of scans for image-guided surgery

The present invention relates to a method for acquiring the position of points for navigated surgery, the method being constituted to be executed by a computer and comprising the following steps:&#x2014;acquiring, on the basis of detecting a first tracked device, first point position data for each of at least two points, wherein the first point position data comprise point position information describing the three-dimensional position of the point within a first co-ordinate system assigned to the first tracked device;&#x2014;acquiring first co-ordinate transformation data for each of at least two points, wherein the first co-ordinate transformation data comprise co-ordinate transformation information describing a transformation of the three-dimensional position of the point from the first co-ordinate system to a second co-ordinate system;&#x2014;acquiring second co-ordinate transformation data for each of at least two points, wherein the second co-ordinate transformation data comprise co-ordinate transformation information describing a transformation of the three-dimensional position of the point from the second co-ordinate system to a third co-ordinate system assigned to a second tracked device;&#x2014;determining, on the basis of the first and second co-ordinate transformation data, second point position data for each of at least two points, wherein the second point position data comprise point position information describing the three-dimensional position of the point within the third co-ordinate system; wherein the second point position data of at least one of the at least two points are determined on the basis of the second co-ordinate transformation data of at least one other of the at least two points.

Interrelated point acquisition for navigated surgery

A data processing method for generating a compensation information for hacking or for determining the position and/or orientation of an object in space, the method comprising the following steps performed by a computer: a) acquiring a predetermined constraint information defining one or more relative or absolute positions and/or orientations of the object in space; b) acquiring position and/or orientation data of the object while the object is positioned or moved while fulfilling the predetermined constraint; and c) determining the compensation information based on the predetermined constraint information and the acquired position and/or orientation data of the object.

Estimation and compensation of tracking inaccuracies

The present invention relates to a method for measuring or verifying the position of a medical implant located in an anatomical body part(s) and/or structure(s) relative to the body part(s) and/or structure(s) or specific points, landmarks or planes of the same, wherein a device is provided which has an at least partially known or previously determined geometry or at least partially known dimensions and is connected to the medical implant; positional or landmark information regarding the anatomical body part(s) and/or structure(s) is acquired; the position of the medical implant is calculated using a navigation system and a reference structure which is or can be connected to the device; and the calculated position of the medical implant is related to or compared with the acquired positional or landmark information regarding the anatomical body part(s) and/or structure(s) in order to measure or verify the position of the medical implant within or relative to the anatomical body part(s) and/or structure(s).

Method, system and device for positioning an implant

A medical data processing method for assisting the positioning of a first medical structure () relative to a second medical structure (), the method being constituted to be executed by a computer and comprising the following steps: &#x2014;acquiring two-dimensional projection image data comprising two-dimensional projection image information describing a two-dimensional projection image of at least the first medical structure (); &#x2014;acquiring registration data comprising registration information describing the registration of the two-dimensional projection image with respect to the first medical structure (); &#x2014;acquiring, on the basis of said two-dimensional projection image data, two-dimensional position data comprising position information describing the position of at least one base point () and at least one reference point () in the two-dimensional projection image; &#x2014;acquiring, on the basis of the two-dimensional position data, positional relationship data comprising positional relationship information describing the positional relationship between the at least one base point () and the at least one reference point () in the two-dimensional projection image; &#x2014;acquiring three-dimensional position data comprising position information describing the position of the at least one base point () and the at least one reference point () in three-dimensional anatomical space, in particular relative to the first medical structure (); &#x2014;determining, on the basis of the positional relationship data, the registration data and the three-dimensional position data, three-dimensional reference point correspondence data comprising correspondence information describing whether or not the position of the at least one reference point () corresponds to the position of the at least one reference point () in the two-dimensional projection image.

Method for assisting the positioning of a medical structure on the basis of two-dimensional image data

The present invention relates to a method for planning the positioning of an implant relative to a body part, comprising the steps of: &#x2014;identifying at least one reference feature of the body part and determining, in a first posture of the patient, a biunique positional and/or orientational relationship between the at least one reference feature and at least one adjustment parameter defined for the first posture, for positioning the implant; &#x2014;identifying the at least one reference feature of the body part in a second posture of the patient; &#x2014;deriving at least one corresponding adjustment parameter defined for the second posture from the position and/or orientation of the at least one reference feature in the second posture and the positional and/or orientational relationship between the at least one reference feature in the first posture and the at least one adjustment parameter defined for the first posture.

Method for planning the positioning of an implant

The present invention relates to a method for planning the positioning of a ball joint prosthesis, in particular a hip joint prosthesis, wherein the prosthesis includes a stem and a cup and the method comprises the following steps: &#x2014;determining the geometric shape of the joint socket, in particular the acetabulum, and the geometric shape of the cup which is to be placed; &#x2014;defining target areas where the cup has to abut the bony structure of the joint socket, in particular the acetabulum, in order for the cup to be sufficiently fixed; &#x2014;determining actual areas of the cup which will abut the bony structure of the joint socket, in particular the acetabulum, when the cup is placed; &#x2014;defining a requirement for the position and/or orientation of the cup on the basis of the position and/or size of the target areas and/or actual areas. The present invention also relates to a method for optimizing the positioning of a ball joint prosthesis, in particular a hip joint prosthesis, wherein the prosthesis includes a stem and a cup and the method comprises the following steps: &#x2014;defining at least one requirement for the position and/or orientation of the cup; &#x2014;calculating an optimum position and/or orientation of the cup on the basis of all the defined requirements being fulfilled.

Method for planning positioning of a ball joint prosthesis

A planning assistance method for correcting joint elements is provided. In accordance with the method, the actual shape of at least one part of the joint element which is of interest is detected. The actual shape is compared with an intended shape, and the comparison data is used to plan the abrasion of joint element parts.

Planning assistance for correcting joint elements

A data processing method for determining the position of a main plane of an anatomical body part, comprising the steps of: &#x2022; providing absolute auxiliary point data which describe the position of at least one actual auxiliary point of the body part relative to a marker device attacked to the body part, the at least one actual auxiliary point being outside the main plane; &#x2022; providing relative point data which constrain the possible positions of the main plane relative to the at least one actual auxiliary point; &#x2022; providing absolute main point data which describe the position of one or two actual main points of the body part relative to the marker device attached to the body part, said one or two actual main points lying in the main plane and/or calculating the position of at least one virtual main point relative to the marker device, said at least one virtual main point being in the main plane and being calculated based on the absolute auxiliary point data and the relative point data; &#x2022; calculating a position of the main plane relative to the marker device, wherein the calculation uses the relative point data and auxiliary point data as well as the provided absolute main point data and/or the calculated position of the at least one virtual main point.

Determining a plane of anatomical body part

The present invention relates to a method for planning the positioning of a ball joint prosthesis, in particular a hip joint prosthesis, wherein the prosthesis includes a stem and a cup and the method comprises the following steps: &#x2014;determining the position of at least one point lying on the rim of the joint socket, in particular the position of at least two points lying in an anterior region of the acetabulum; &#x2014;defining a requirement for the position and/or orientation of the cup on the basis of the determined positions of the at least one point. The present invention also relates to a method for optimizing the positioning of a ball joint prosthesis, in particular a hip joint prosthesis, wherein the prosthesis includes a stem and a cup and the method comprises the following steps: &#x2014;defining at least one requirement for the position and/or orientation of the cup; &#x2014;calculating an optimum position and/or orientation of the cup on the basis of all the defined requirements being fulfilled.

The invention relates to a computer-assisted planning method for reconstructing changes in shape on joint bones, comprising the following steps:

Joint reconstruction planning using model data

A method for determining a characteristic axis of a body structure includes generating at least two two-dimensional recordings of an area of the body structure; comparing each of the at least two recordings of the area with a generic model of the area in question, said generic model containing information on the position of the characteristic axis; ascertaining a mapping protocol for mapping the respective generic model onto the respective recording of the area; using the ascertained mapping protocol to map the respective position of the characteristic axis in the respective generic model to obtain the respective position of the characteristic axis in the two-dimensional mapping of the body structure; and using rear projection to determine a three-dimensional position of the characteristic axis from the at least two characteristic axes in the two-dimensional mappings.

Determining shaft and femur neck axes and three-dimensional reconstruction

A system and method for determining the position of correspondence object pairs including A-objects and B-objects that represent the same objects of the same anatomical body structure in two different reference frames A and B, including: defining A-objects and B-objects that each represent different objects of the body structure in their respective reference frames; determining geometric relationship data A and geometric relationship data B that describe a geometric relationship between the A-objects based on positions of the A-objects in the reference frame A and the B-objects in the B reference frame; and providing data derived or extracted from the geometric relationship data A and from the geometric relationship data B to allow a comparison of a geometric relationship between at least two A-objects to a geometric relationship between at least two B-objects.

Determining correspondence object pairs for medical navigation

The patent discloses a system and method for correcting changes in the shape of joint bones in a bone joint, including: providing a three-dimensional imaging data set of a bone joint; identifying the joint bones in the data set based on the shapes of the joint bones; inscribing a portion of a joint bone to be reconstructed with a base shape; determining contour deviations of the inscribed joint bone from the base shape by ascertaining contour distances between the base shape and the shape of the inscribed joint bone in different incision planes; determining a three-dimensional deviating volume using the contour deviations; and using the deviating volume for correction planning.

Computer-assisted planning method for correcting changes in the shape of joint bones

A system and method for computer-assisted joint analysis, wherein the joint elements in a three-dimensional imaging data set are segmented and then projected onto a two-dimensional or three-dimensional reference area for interference analysis and surgical planning.

Growing community of inventors

Gilching, Germany

Martin Haimerl