Brainlab Ag

Smith + Nephew

Smith & Nephew Orthopaedics Ag

Smith Nephew Asia Pacific Pte. Limited

Mario Schubert

Lars Dohmen

Anna Wiedenmann

Martin Haimerl

Luise Poitzsch

Sabine Kling

Christian Brack

Gregor Tuma

Steffen Beck

Timo Neubauer

Melanie Wegner

Stefan Vilsmeier

Oliver Fleig

Claus Schaffrath

Melanie Stulpe

Mario Zeiss

Falko Seifferth

Peter Drumm

Sabine Gneiting

Florian Haidacher

Frank Gruenschlaeger

Claus Shaffrath

Heiko Müller

The invention relates to a method of determining the sagittal rotation of a patient's pelvis based on a standard anterior posterior X-ray-image with known image parameters and a calibration of the image, for example by using at least one King-Mark calibration object. The angle of the pelvic rotation is determined between a pelvic plane which is orthogonal to the midsagittal plane of the pelvis, and the image plane of the X-ray-image. Assuming the patient's position shown on the X-ray-image represents a standard neutral position, the X-ray-image plane can be used as a functional reference plane for further calculations, for example during hip-replacement surgery. The present invention further relates to a corresponding computer program and system.

Sagittal rotation determination

The present invention relates to a method for determining the spatial position of objects, in particular medical objects. First position data is acquired that describes a spatial position of an object in a first coordinate system. First transformation data is acquired that transforms the object's position from the first coordinate system to a second coordinate system. Based on the foregoing data, second position data is acquired that specifies the spatial position of the object in the second coordinate system. Second transformation data is acquired that transforms the object's position from the second coordinate system to an inertial coordinate system. Based on the second position data and the second transformation data, inertial position data is determined that specifies a position of the object in the inertial coordinate system.

Method for determining the spatial position of objects

The present invention relates to a method for registering a first anatomical structure () which is articulately coupled to a second anatomical structure (), the method being constituted to be executed by a computer and comprising the steps of: The present invention further relates to a corresponding computer program and system.

Method for registering articulated anatomical structures

A data processing method performed by a computer for judging implant orientation data representing an orientation of a first implant part relative to a first bone, the first implant part being part of an implant pair which further comprises a second implant part for a second bone, the implant pair being envisaged to be implanted in a patient, comprising the steps of: &#x2014;acquiring the implant orientation data, -acquiring second implant orientation data representing the orientation of the second implant part relative to the second bone, -acquiring implant shape data representing the shapes of the first and second implant parts, &#x2014;acquiring activity data representing at least one desired activity of the patient to be possible after implanting the implant, wherein each desired activity has an associated range of motion between the first bone and the second bone, &#x2014;calculating a range of motion volume, which represents possible orientations between the first bone and the second bone over three rotational axes, from the implant orientation data, the second implant orientation data and the implant shape data, and &#x2014;judging the implant orientation data to be feasible if the ranges of motion of all desired activities lie within the range of motion volume.

Method and apparatus for judging implant orientation data

The invention relates to a medical registration apparatus (), comprising &#x2022;two flanks (); &#x2022;a pivot portion () around which at least one of the flanks () is rotatable with respect to a rotation centre () (FIG., FIG.); &#x2022;a contacting portion () on each of the flanks (), each contacting portion () being spaced apart from the rotation centre (); and &#x2022;a sensor () being arranged with an offset (r, FIG.A) to a line (a) connecting the contacting portions (). The invention also relates to a data processing method for use with the medical registration apparatus.

Medical registration apparatus and method for registering an axis

The present invention relates to a data processing method performed by a computer, for determining geometric parameters of a phantom leg bone using a cutting guide that defines a cutting plane and that is configured to abut a predetermined surface section of the phantom leg bone. The method comprises acquiring cutting guide position data describing the spatial position of the cutting guide, acquiring relative position data describing the spatial position of a first mechanical axis point relative to the predetermined surface section of the phantom leg bone, and determining, based on the cutting guide position data and the relative position data, first axis point position data describing the spatial position of the first mechanical axis point of the phantom leg bone. The present invention further relates to a corresponding cutting guide and a corresponding computer program and computer.

Method and device for determining geometric parameters for total knee replacement surgery

A data processing method performed by a computer for judging implant orientation data representing an orientation of a first implant part relative to a first bone, the first implant part being part of an implant pair which further comprises a second implant part for a second bone, the implant pair being envisaged to be implanted in a patient.

A computer implemented method for determining a center of rotation of a bone, comprising the steps of: a) acquiring image data representing a plurality of images taken by a camera while the bone is being rotated about the center of rotation, wherein the images show a marker device attached to the bone; b) forming a plurality of image pairs from the image data, wherein each image pair comprises two different images; c) determining a first relative position of the marker device relative to the camera from a first image of an image pair; d) determining a second relative position of the marker device relative to the camera from a second image of the same image pair; e) calculating a transformation of the first relative position into the second relative position; f) repeating steps c) to e) for all image pairs to obtain a plurality of transformations; and calculating the location of the center of rotation of the bone relative to the marker device from the plurality of transformations.

Determination of center of rotation of a bone

A method, performed by a computer, for measuring geometric length and offset differences of a subject element using landmarks obtained through, for example, analysis of medical data images. The method may include obtaining medical image data from a medical imaging device. The method includes measuring, by the computer, a first landmark vector between a femoral landmark and a second landmark at a first point in time from, for example, the medical data images. Further, the method includes measuring, by the computer, a second landmark vector between the femoral landmark and the second landmark at a second point in time which is later than the first point in time from, for example, the medical data images. Calculating an orthogonal projection of the first landmark vector into a sagittal plane and using the direction of the orthogonal projection of the first landmark vector into the sagittal plane as a length direction. Calculating a direction which is perpendicular to the sagittal plane and using this direction as an offset direction and calculating the length difference in the length direction and the offset difference in the offset direction from the first landmark vector and the second landmark vector.

Method and apparatus for determining differences in geometry of subject element using landmarks

Implant orientation data representing a range of functional orientations of a first implant part relative to a first bone is determined. The first implant part is part of an implant pair to be implanted in an associated patient. The implant pair includes the first implant part and a second implant part. Second implant orientation data representing an orientation of the second implant part relative to a second bone is acquired. Implant shape data representing shapes of the first and the second implant parts is acquired. Activity data representing a desired activity of the associated patient is acquired. The desired activity has an associated original range of motion between the first bone and the second bone. The implant orientation data is determined based on the second implant orientation data, the implant shape data, and the activity data.

Determination of an implant orientation relative to a bone

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.

Growing community of inventors

Poing, Germany

Mario Schubert