-
11.发明申请公开(公告)号：US20210209750A1
公开(公告)日：2021-07-08
申请号：US16075450
申请日：2017-05-23
Applicant: Brainlab AG
Inventor： Pablo APONTE , Jochen VEIGEL , Ivana IVANOVSKA , Hagen KAISER
Abstract: A method for determining the relative position between a first camera and a second camera used in a medical application, wherein the first camera captures a 2D image of a phantom, the second camera emits light onto the phantom and analyzes the reflected light, thus generating a 3D point cloud representing points on the surface of the phantom, and the phantom has a planar surface forming a background on which a plurality of 2D markers are formed, wherein one of the background and the 2D markers is reflective, thus reflecting light emitted by the second camera back to the second camera, and the other one is non-reflective, thus not reflecting light emitted by the second camera back to the second camera, the method involving that a) the first camera captures a 2D image of the phantom, b) the second camera generates a 3D point cloud representing the planar surface of the phantom, c) the 2D markers are identified in the 2D image, thus obtaining 2D marker data representing the locations of the 2D markers in the 2D image, d) the 2D markers are identified in the 3D point cloud using the property that points on a non- reflective part of the planar surface are identified as having a larger distance to the second camera than points on a reflective part of the planar surface, thus obtaining 3D marker data representing the locations of the 2D markers in a reference system of the second camera, and e) fmding the relative position between the first camera and the second camera by applying a Perspective-n-Points algorithm on the 2D marker data and the 3D marker data.
-
公开(公告)号：US20200337599A1
公开(公告)日：2020-10-29
申请号：US16928662
申请日：2020-07-14
Applicant: Brainlab AG
Inventor： Hagen KAISER , Stephen FROEHLICH , Stefan VILSMEIER
IPC: A61B5/11 , H04N13/204 , A61B5/00 , A61B5/113 , A61N5/10 , A61B5/01 , G01J5/00 , G03B35/02 , G06T7/33 , G06T7/70 , A61B5/055 , A61B6/03 , A61B6/00 , G06T7/00
Abstract: A medical image processing method performed by a computer, for measuring the spatial location of a point on the surface of a patient's body including: acquiring at least two two-dimensional image datasets, wherein each two-dimensional image dataset represents a two-dimensional image of at least a part of the surface which comprises the point, and wherein the two-dimensional images are taken from different and known viewing directions; determining the pixels in the two-dimensional image datasets which show the point on the surface of the body; and calculating the spatial location of the point from the locations of the determined pixels in the two-dimensional image datasets and the viewing directions of the two-dimensional images; wherein the two-dimensional images are thermographic images.
-
13.发明申请公开(公告)号：US20180093110A1
公开(公告)日：2018-04-05
申请号：US15564600
申请日：2017-02-10
Applicant: Brainlab AG
Inventor： Kajetan BERLINGER , Hagen KAISER
Abstract: Disclosed is a method for determining a positional pattern of an irradiation unit for irradiating a patient with treatment radiation. Optimal order data describing an order of the irradiation unit positions for which the statistical value is optimal is determined. The optimal order data is determined based on irradiation unit position data describing irradiation unit positions of the irradiation unit for which the imaging device has a free viewing direction onto the position of the patient, position orders data describing all possible orders of the irradiation unit positions for which the imaging device has a free viewing direction onto the position of the patient, and intersection angle data describing a statistical quantity of the intersection angles between free viewing directions of the imaging unit for irradiation unit positions which are immediately subsequent in the order described by the position orders data.
-
公开(公告)号：US20170311813A1
公开(公告)日：2017-11-02
申请号：US15528043
申请日：2014-12-02
Applicant: Brainlab AG
Inventor： Hagen KAISER , Stephen FROEHLICH , Stefan VILSMEIER
IPC: A61B5/01 , A61B5/00 , G06T7/33 , A61B5/11 , A61B6/03 , A61B6/00 , G06T7/00 , A61B5/055 , G06T7/70 , G01J5/10 , G01J5/00 , G01R33/48
Abstract: A medical image processing method performed by a computer, for measuring the spatial location of a point on the surface of a patient's body including: acquiring at least two two-dimensional image datasets, wherein each two-dimensional image dataset represents a two-dimensional image of at least a part of the surface which comprises the point, and wherein the two-dimensional images are taken from different and known viewing directions; determining the pixels in the two-dimensional image datasets which show the point on the surface of the body; and calculating the spatial location of the point from the locations of the determined pixels in the two-dimensional image datasets and the viewing directions of the two-dimensional images; wherein the two-dimensional images are thermographic images.
-
-
-
Search Results
14
records
(took 0.013 seconds)
