公开(公告)号：US10143434B2

公开(公告)日：2018-12-04

申请号：US15312372

申请日：2015-05-13

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roland Proksa ,  Thomas Koehler

IPC: A61B6/00 ,  G01T1/36 ,  G01T1/29 ,  A61B6/03

Abstract: The invention relates to an imaging system (17) like a computed tomography system for generating an image of an object. Spectral measured projection data and non-spectral measured projection data are generated by a detector (6) having spectral detection elements and non-spectral detection elements, and spectral estimated projection data are estimated by using a model material distribution which could have caused the non-spectral measured projection data and by simulating a measurement of the spectral estimated projection data based on the model material distribution. An image is reconstructed based on the measured and estimated spectral projection data. Using the spectral estimated projection data in addition to the spectral measured projection data can lead to high quality spectral imaging, especially high quality spectral computed tomography imaging, which uses a simplified detector not only having generally more complex spectral detection elements, but also having simpler non-spectral detection elements.

公开(公告)号：US10089720B2

公开(公告)日：2018-10-02

申请号：US14354685

申请日：2012-10-31

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas Koehler ,  Bernhard Johannes Brendel

IPC: G06T5/00 ,  G06T5/20

Abstract: An apparatus for and a method of correcting an image for an image artifact. An initial image is corrected by an image artifact corrector (190). The so corrected sample correction image is compared with the initial image to obtain information on the corrective action. The corrective action is then adaptively reapplied by a controller (140) to obtain an improved corrected image thereby ensuring previously present artifacts are removed and creation of new artifacts are avoided.

公开(公告)号：US09775580B2

公开(公告)日：2017-10-03

申请号：US15519176

申请日：2015-10-12

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roland Proksa ,  Thomas Koehler ,  Michael Grass

IPC: A61B6/03 ,  A61B6/00

CPC classification number: A61B6/5205 ,  A61B6/032 ,  A61B6/405 ,  A61B6/4241 ,  A61B6/50 ,  A61B6/503 ,  A61B6/5258 ,  A61B6/5288 ,  A61B6/541

Abstract: A method includes modulating a flux of emission radiation between a first lower flux level and a second higher flux level in coordination with a cardiac cycle signal so that the flux is at the first lower flux level during a first cardiac motion phase having a first higher cardiac motion and is at the second higher flux level during a second cardiac motion phase having a second lower cardiac motion. The method further includes reconstructing the projection data with a first reconstruction window, which applies a first higher weight to a first sub-set of the projection data that corresponds to the first cardiac motion phase and the lower first flux level and a second lower weight to a second sub-set of the projection data that corresponds to the second cardiac motion phase and the higher second flux level, to generate first volumetric image data.

公开(公告)号：US09761021B2

公开(公告)日：2017-09-12

申请号：US14397878

申请日：2013-05-13

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas Koehler ,  Bernhard Johannes Brendel ,  Ewald Roessl ,  Udo van Stevendaal

IPC: G06T11/00 ,  G01T1/29 ,  G01N23/20 ,  G01N23/201 ,  A61B6/00 ,  G01N21/88 ,  G01N23/04

CPC classification number: G06T11/005 ,  A61B6/42 ,  A61B6/48 ,  G01N23/046 ,  G01N23/20083 ,  G01N23/201 ,  G01N2021/8822 ,  G01N2021/8825 ,  G01N2223/054 ,  G01T1/2907 ,  G06T11/006 ,  G06T2207/10081

Abstract: A method includes obtaining a dark-field signal generated from a dark-field CT scan of an object, wherein the dark-field CT scan is at least a 360 degree scan. The method further includes weighting the dark-field signal. The method further includes performing a cone beam reconstruction of the weighted dark-field signal over the 360 degree scan, thereby generating volumetric image data. For an axial cone-beam CT scan, in one non-limiting instance, the cone-beam reconstruction is a full scan FDK cone beam reconstruction. For a helical cone-beam CT scan, in one non-limiting instance, the dark-field signal is rebinned to wedge geometry and the cone-beam reconstruction is a full scan aperture weighted wedge reconstruction. For a helical cone-beam CT scan, in another non-limiting instance, the dark-field signal is rebinned to wedge geometry and the cone-beam reconstruction is a full scan angular weighted wedge reconstruction.

公开(公告)号：US09761006B2

公开(公告)日：2017-09-12

申请号：US14896827

申请日：2014-06-26

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Frank Bergner ,  Rolf Dieter Bippus ,  Bernhard Johannes Brendel ,  Michael Grass ,  Cristian Lorenz ,  Thomas Koehler

IPC: G06T7/00 ,  G06T5/00 ,  G06T7/12 ,  G06T7/13 ,  G06T7/149 ,  G06T7/136

CPC classification number: G06T7/136 ,  G06T5/002 ,  G06T7/12 ,  G06T7/13 ,  G06T7/149 ,  G06T2207/10072 ,  G06T2207/20076 ,  G06T2207/20116 ,  G06T2207/20124 ,  G06T2207/30004

Abstract: Image processing methods and related apparatuses (SEG,UV). The apparatuses (SEG,UV) operate to utilize noise signal information in images (IM). According to one aspect, apparatus (SEG) uses the noise information (FX) to control a model based segmentation. According to a further aspect, apparatus (UV) operates, based on the noise information (FX), to visualize the uncertainty of image information that resides at edge portions of the or an image (IM).

公开(公告)号：US09600875B2

公开(公告)日：2017-03-21

申请号：US14441045

申请日：2013-11-20

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Michael Grass ,  Thomas Koehler ,  Cristian Lorenz

IPC: G06K9/00 ,  G06T7/00

CPC classification number: G06T7/0012 ,  G06K9/00 ,  G06T2207/10081 ,  G06T2207/10088 ,  G06T2207/10116 ,  G06T2207/30056

Abstract: Described herein is an approach to identify a presence (or absence) of a tissue disease based on a quantification of a roughness of a surface of the tissue represented in imaging data. The approach includes an image data processor (120) with a surface roughness quantifier (206) that generates a metric that quantifies a roughness of a surface of a tissue of interest in 3D image data based on a surface model adapted to the tissue of interest in the 3D image data and a decision component (208) that generates a value signal indicating a presence or an absence of disease in the tissue of interest based on the metric.

公开(公告)号：US12272036B2

公开(公告)日：2025-04-08

申请号：US17778946

申请日：2020-11-20

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas Koehler ,  Andriy Yaroshenko ,  Hanns-Ingo Maack ,  Thomas Pralow ,  Bernd Lundt

IPC: G06T5/80 ,  G06T5/50 ,  G06T7/20

Abstract: A system (IPS) and related method for image processing, in particular dark-field or phase contrast imaging to reduce motion artifacts. The system comprises an input interface (IN) for receiving a series of projection images (π) acquired by an X-ray imaging apparatus (XI) of an object (OB) for a given projection direction, the imaging apparatus (XI) configured for phase-contrast and/or dark-field imaging A phase-contrast and/or dark-field image generator (IGEN) applies an image generation algorithm to compute a first image based on the series the projection images (π). A motion artifact detector (MD) detects a motion artifact in the first image. A combiner (Σ) combines, if a motion artifact is so detected, a part of the first image with a part of at least one auxiliary image to obtain a combined image. The auxiliary image was previously computed by a gated application of the image generation algorithm in respect of a subset of the series of the projection images (π). The combined image may be output at an output interface (OUT) as a motion artifact reduced image.

公开(公告)号：US12201465B2

公开(公告)日：2025-01-21

申请号：US17274798

申请日：2019-09-12

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas Koehler ,  Jörg Sabczynski ,  Rafael Wiemker

IPC: G06T7/00 ,  A61B6/00 ,  A61B6/42 ,  A61B6/50 ,  G06T7/254 ,  G16H50/30

Abstract: The present invention relates to a calculation device (10) for comparing dark-field X-ray images. The calculation device in (10) is configured for receiving a first dark-field X-ray image (11) describing first dark-field X-ray signals of a patient at an expiration state and for receiving a second dark-field X-ray image (12) describing second dark-field X-ray signals of the patient at an inspiration state. The calculation device is further (10) configured for normalizing the first dark-field X-ray signals of the first dark-field X-ray tin image (11) with a lung thickness value describing the lung thickness at the expiration state and for normalizing the second dark-field X-ray signals of the second dark-field X-ray image (12) with a lung thickness value describing the lung thickness at the inspiration state. Further, the calculation device (10) is configured for comparing the normalized first dark-field X-ray signals with the normalized second dark-field X-ray signals, thereby determining a comparison result (13) and for determining whether at least one area of the patient's lung with a ventilation defect exists based on the comparison result (13).

公开(公告)号：US12102467B2

公开(公告)日：2024-10-01

申请号：US18279479

申请日：2022-12-16

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas Koehler ,  Jens Von Berg

IPC: A61B6/50 ,  A61B6/00

CPC classification number: A61B6/5235 ,  A61B6/50

Abstract: There is provided a computer-implemented method of estimating lung volume from radiographic images. The method comprises: registering (102) a two dimensional radiographic image (12) of a patients chest to a three dimensional radiographic image (14) of the patients chest to estimate data describing projection geometry (16) of an imaging setup used to capture the two dimensional radiographic image; using the projection geometry to estimate (104) at least one radiographic magnification factor (18) relating to the imaging setup; and calculating (106) an estimated lung volume (20) using the two dimensional radiographic image and the at least one radiographic magnification factor.

公开(公告)号：US20240023926A1

公开(公告)日：2024-01-25

申请号：US18207263

申请日：2023-06-08

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Rafael Wiemker ,  Roberto Buizza ,  Jaap Roger Haartsen ,  Cornelis Petrus Hendriks ,  Thomas Koehler ,  Michael Polkey ,  Joerg Sabczynski ,  Nataly Wieberneit

IPC: A61B8/08 ,  A61B8/00 ,  G06T7/33 ,  G06T7/00

CPC classification number: A61B8/0875 ,  A61B8/4483 ,  G06T7/344 ,  G06T7/0014 ,  G06T2207/10081 ,  G06T2207/20084

Abstract: A diaphragm measurement device includes a non-transitory storage medium storing a patient-specific registration model for referencing ultrasound imaging data to a reference frame. At least one electronic processor is programmed to perform a diaphragm measurement method including receiving ultrasound imaging data of a diaphragm of a patient during inspiration and expiration while the patient undergoes mechanical ventilation therapy with a mechanical ventilator; calculating a diaphragm thickness metric based on the received ultrasound imaging data of the diaphragm of the patient referenced to the reference frame using the patient-specific registration model; and displaying, on a display device, a representation of the calculated diaphragm thickness metric.