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1.发明申请公开(公告)号：US20250054138A1
公开(公告)日：2025-02-13
申请号：US18720157
申请日：2022-12-16
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： DIRK SCHAEFER , CHRISTIAN HAASE , MICHAEL GRASS , DANIEL SIMON ANNA RUIJTERS , WOUTER WIGGERS , IVO CANJELS , MARIJKE ANTONIA ADRIANA VAN VLIMMEREN , ROBERT VAN KEULEN , ANGELIQUE BALGUID
Abstract: All X-ray computerized tomography systems that are available or proposed base their reconstructions on measurements that integrate over energy. X-ray tubes produce a broad spectrum of photon energies and a great deal of information can be derived by measuring changes in the transmitted spectrum. We show that for any material, complete energy spectral information may be summarized by a few constants which are independent of energy. A technique is presented which uses simple, low-resolution, energy spectrum measurements and conventional computerized tomography techniques to calculate these constants at every point within a cross-section of an object. For comparable accuracy, patient dose is shown to be approximately the same as that produced by conventional systems. Possible uses of energy spectral information for diagnosis are presented.
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公开(公告)号：US20210012545A1
公开(公告)日：2021-01-14
申请号：US17040744
申请日：2019-03-18
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： CHRISTIAN HAASE , MICHAEL GRASS , DIRK SCHAEFER
Abstract: Cone beam computed tomography image acquisition protocols typically acquire a series of 2D projection images around a region of interest of a patient. The time required for a C-arm to travel around an acquisition orbit around the region of interest of a patient is non-trivial, and as a result, a patient being imaged may move during the acquisition. This is problematic because many computed tomography image acquisition algorithms assume that a patient is perfectly still during the acquisition time. If patient moves as the series of 2D projection images is being obtained, a 3D reconstruction will be affected by image artefacts. This application proposes to identify and to remove image artefacts caused by the relative motion of at least two rigid objects in the region of interest (For example, a mandible moving with respect to a skull during the acquisition). The at least two rigid objects have a more predictable motion characteristic, which may be used to correct 2D images of the input projection image sequence before a final reconstruction step. Accordingly, 3D images of a patient may be provided with fewer artefacts even when a patient moves during an acquisition.
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公开(公告)号：US20230252628A1
公开(公告)日：2023-08-10
申请号：US18136294
申请日：2023-04-18
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： CHRISTIAN HAASE , HOLGER SCHMITT , MICHAEL GRASS , ARJEN VAN DER HORST
CPC classification number: G06T7/0012 , G06T11/00 , G06T7/11 , G06T7/60 , G16H50/50 , G16H50/20 , G06T2207/30104 , G06T2207/10116 , G06T2210/24 , G06T2210/41
Abstract: An apparatus for assessing a patient's vasculature and a corresponding method are provided, in which the bifurcations in a vessel of interest are identified on the basis of a local change in at least one geometric parameter value of the vessel of interest and the fluid dynamics inside the vessel of interest are adjusted to take account for said bifurcations.
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公开(公告)号：US20200281562A1
公开(公告)日：2020-09-10
申请号：US16651677
申请日：2018-09-26
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： CHRISTIAN HAASE , HOLGER SCHMITT , SVEN PREVRHAL
Abstract: The invention relates to a system and a method for guiding an intravascular ultrasound catheter device comprising an ultrasound probe to a potential lesion in a vascular tree (31). In the system, position information of the probe are provided for displaying to a user and/or for an automated processing of the position information. An evaluation unit is configured to receive a diagnostic image of the vascular tree, to determine values of at least one vessel parameter for a plurality of locations in the vascular tree, and to identify at least one location associated with an abnormal value of the at least one vessel parameter. Further, a mapping unit is configured to provide a visual indication (32) of the at least one location in the visualization of the vascular tree and/or to provide information about the at least one location for use in the automated processing of the position information.
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公开(公告)号：US20250160779A1
公开(公告)日：2025-05-22
申请号：US18841752
申请日：2023-02-22
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ERAN LANGZAM , HANNES NICKISCH , CHRISTIAN HAASE , MICHAEL GRASS , HOLGER SCHMITT
Abstract: A computer-implemented method of measuring a blood flow parameter in a vasculature, is provided. The method includes: analyzing spectral CT projection data to isolate from the spectral CT projection data, contrast agent projection data representing the flow of the injected contrast agent; sampling the contrast agent projection data at one or more regions of interest in the vasculature to provide temporal blood flow data at the one or more regions of interest; and calculating, from the temporal blood flow data, a value of one or more blood flow parameters at the one or more regions of interest.
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Patent Agency Ranking
公开(公告)号：US20250062000A1
公开(公告)日：2025-02-20
申请号：US18721217
申请日：2022-12-15
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： CHRISTIAN HAASE , RAOUL FLORENT
Abstract: The invention is directed towards an improved image-guided therapy system.
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公开(公告)号：US20210153836A1
公开(公告)日：2021-05-27
申请号：US17047103
申请日：2019-04-05
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： CHRISTIAN HAASE , MICHAEL GRASS , DIRK SCHAFER
IPC: A61B6/00
Abstract: Mechanical image acquisition systems (such as medical C-arms) frequently accumulate geometrical errors which must be calibrated out using a calibration phantom. A more frequent regime of system calibration implies a less frequent use of the C-arm for clinical applications. The present application proposes to identify common biases between the acquired projection frame sequences from the same mechanical image acquisition system in first and second acquisitions, and to compare this to expected calibration data of the mechanical image acquisition system to generate frame deviation measures. If a resemblance between the first and second sequences of frame deviation measures is obtained, one or more calibration actions are performed (such as alerting the user that calibration should be provided, and/or automatically correcting for the geometry deviation).
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公开(公告)号：US20250049516A1
公开(公告)日：2025-02-13
申请号：US18719864
申请日：2022-12-08
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： JAVAD FOTOUHI , MARCIN ARKADIUSZ BALICKI , AYUSHI SINHA , CHRISTIAN HAASE
Abstract: A method and system enable estimating and visualizing trajectories of an interventional device guided by a robot and configured for insertion into an anatomical structure. The method includes training a model with regard to predicting trajectories of the interventional device based on training data from previous images and corresponding control inputs; receiving image data from an image showing a current position of the interventional device; receiving untriggered control inputs for controlling the robot to guide future movement of the interventional device; predicting a trajectory of the interventional device by applying the image data and the untriggered control inputs to the trained model; displaying the predicted trajectory of the interventional device overlaid on the image of the anatomical structure; triggering the untriggered control inputs to control the robot to guide movement of the interventional device according to the triggered control inputs when the predicted trajectory is acceptable.
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公开(公告)号：US20240164733A1
公开(公告)日：2024-05-23
申请号：US18282595
申请日：2022-03-14
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： RAOUL FLORENT , CLAIRE LEVRIER , CHRISTIAN HAASE , HAITHEM BOUSSAID
CPC classification number: A61B6/504 , A61B6/481 , A61B6/5258 , G06T7/00 , G06T2207/10116
Abstract: The present invention relates to subtraction imaging. In order provide further improved accuracy of masking images, a device (10) for digital subtraction imaging is provided comprising an image data input (12), a data processor (14) and an output interface (16). 3D image data (22) of a region of interest of an object is received that comprises a 3D representation of the object based on a reconstruction from a plurality of 2D projection images. Further, a 2D live X-ray image (24) of the region of interest is received. The 3D image data and the 2D live X-ray image are registered, wherein a matching pose of the 3D image data corresponding to the 2D live X-ray image is determined. A digitally reconstructed radiography is computed from the 3D image data based on the determined matching pose to generate a 2D mask image. For the 2D mask image, current data related to the 2D live X-ray image is used to achieve an adapted 2D mask image, wherein the data related to 10 the 2D live X-ray image comprises 2D live acquisition parameters and/or data of the 2D live X-ray image. The generated adapted 2D mask is subtracted image from the 2D live X-ray image a digital image highlighting changes in the region of interest is provided.
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公开(公告)号：US20230419563A1
公开(公告)日：2023-12-28
申请号：US18036204
申请日：2021-11-04
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： CHRISTIAN HAASE , MICHAEL GRASS , THOMAS HEIKO STEHLE, Sr. , FRANK BERGNER , SEBASTIAN WILD
CPC classification number: G06T11/006 , G06T7/337 , G06T7/38 , G06T2210/41 , G06T2207/10081 , G06T2207/30004 , G06T2207/20212
Abstract: A method for use in image reconstruction of CT projection data, which aims at reducing motion artefacts in reconstructed images caused by movement of anatomical bodies. Embodiments are based on mitigating motion artefacts based on restricting the range of data that is used for reconstructing each slice. More particularly, a sub-range of the projection data corresponding to each slice is selected, this sub-range being chosen based on determining one or more sub-windows of visibility of a target anatomical object or event within the projection data sequence. The event may be a particular phase of a movement cycle of the anatomical body. The structure could be a particular portion of the anatomical body which is of interest. Either approach leads to reduction of motion artefacts within a single slice, by restricting the data range, and focusing upon the data which is most relevant clinically.
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