公开(公告)号：US12096992B2

公开(公告)日：2024-09-24

申请号：US17049634

申请日：2020-03-16

Applicant: Brainlab AG

Inventor： Thomas Drexl ,  Melanie Wegner

IPC: A61B34/20 ,  A61B34/10 ,  A61B90/00 ,  A61B17/00

CPC classification number: A61B34/20 ,  A61B2017/00725 ,  A61B2034/102 ,  A61B2034/2055 ,  A61B2034/2068 ,  A61B2090/3945

Abstract: A computer implemented medical method of calibrating a medical instrument is provided. The method calculates a position of the instrument tip model within the indentation model, associated with an estimated position of the instrument tip within the indentation and calibrates the medical instrument, thereby using the determined position of the instrument tip model. The position of any arbitrary medical instrument tip, such as an indentation of a calibration device, can be estimated. This is an improvement of accuracy in view of the generic approach of using the same reference point of the indentation of the calibration device for any arbitrary medical instrument tip. A virtual model of a shape of a medical instrument, such as the instrument tip, is matched onto a virtual model of a shape of a calibration device, such as an indentation of the calibration device.

公开(公告)号：US10244967B2

公开(公告)日：2019-04-02

申请号：US15617793

申请日：2017-06-08

Applicant: Brainlab AG

Inventor： Mario Schubert ,  Melanie Wegner ,  Sabine Kling ,  Luise Poitzsch

IPC: A61B5/00 ,  A61B5/107 ,  A61B5/11 ,  G01B11/14 ,  G06K9/52 ,  G06T3/60 ,  G06T7/00 ,  G06T7/60 ,  A61B34/20 ,  G06T7/30 ,  G06T7/73 ,  G06F19/00 ,  A61B90/00

Abstract: 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.

公开(公告)号：US20180085032A1

公开(公告)日：2018-03-29

申请号：US15617793

申请日：2017-06-08

Applicant: Brainlab AG

Inventor： Mario Schubert ,  Melanie Wegner ,  Sabine Kling ,  Luise Poitzsch

IPC: A61B5/107 ,  A61B5/00

CPC classification number: A61B5/1079 ,  A61B5/0077 ,  A61B5/1072 ,  A61B5/1075 ,  A61B5/1121 ,  A61B5/1127 ,  A61B5/4538 ,  A61B5/7278 ,  A61B34/20 ,  A61B2034/2048 ,  A61B2034/2055 ,  A61B2034/2068 ,  A61B2090/3937 ,  A61B2562/0219 ,  A61B2576/00 ,  G01B11/14 ,  G06F19/00 ,  G06K9/52 ,  G06T3/60 ,  G06T7/0014 ,  G06T7/30 ,  G06T7/60 ,  G06T7/73 ,  G06T7/74 ,  G06T2207/30004 ,  G06T2207/30204

Abstract: 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.

公开(公告)号：US09642560B2

公开(公告)日：2017-05-09

申请号：US14766471

申请日：2013-04-03

Applicant: Brainlab AG

Inventor： Mario Schubert ,  Melanie Wegner ,  Sabine Kling

IPC: G06K9/00 ,  A61B5/107 ,  G06T7/00 ,  A61B5/11 ,  G01B11/14 ,  G06K9/52 ,  G06T3/60 ,  G06T7/60 ,  A61B5/00 ,  A61B34/20 ,  A61B90/00

CPC classification number: A61B5/1079 ,  A61B5/0077 ,  A61B5/1072 ,  A61B5/1075 ,  A61B5/1121 ,  A61B5/1127 ,  A61B5/4538 ,  A61B5/7278 ,  A61B34/20 ,  A61B2034/2048 ,  A61B2034/2055 ,  A61B2034/2068 ,  A61B2090/3937 ,  A61B2562/0219 ,  A61B2576/00 ,  G01B11/14 ,  G06F19/00 ,  G06K9/52 ,  G06T3/60 ,  G06T7/0014 ,  G06T7/30 ,  G06T7/60 ,  G06T7/73 ,  G06T7/74 ,  G06T2207/30004 ,  G06T2207/30204

Abstract: A data processing method for determining the relative orientation of an object coordinate system of an anatomical object in a global co-ordinate system, comprising the steps of: acquiring a reference direction dataset representing a first reference direction of a line between a first anatomical landmark of a reference object and a second anatomical landmark of the reference object, and a second reference direction of a line between a third anatomical landmark of the reference object and a fourth anatomical landmark of the reference object, wherein the first and second reference directions are given in a reference coordinate system and the reference object corresponds to the anatomical object; acquiring an object direction dataset representing a first object direction of a line between the first anatomical landmark of the anatomical object and the second anatomical landmark of the anatomical object, and a second object direction of a line between the third anatomical landmark of the anatomical object and the fourth anatomical landmark of the anatomical object, wherein the first and second object directions are given in the global co-ordinate system and the landmarks of the anatomical object correspond to the landmarks of the reference object; calculating the orientation of the reference co-ordinate system relative to the global co-ordinate system which results in the best match between each of the reference directions and the respectively corresponding object direction; and—using the orientation of the reference co-ordinate system in the global co-ordinate system as the relative orientation of the object co-ordinate system.