Patents by Inventor Roland Proksa

Roland Proksa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10980506
    Abstract: An image signal processing system (ISP) comprising an input interface (IN) for receiving photon counting projection data acquired by an X-ray imaging apparatus (IA) having a photon counting detector (D). A calibration data memory (CMEM) of the system holds calibration data. The calibration data encodes photon counting data versus path lengths curves for different energy thresholds of i) said detector (D) or ii) of a different detector. At least one of said curves is not one-to-one. A path length convertor (PLC) of the system converts an entry in said photon counting projection data into an associated path length based on said calibration data.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: April 20, 2021
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Ewald Roessl, Roger Steadman, Christoph Herrmann, Roland Proksa
  • Patent number: 10983071
    Abstract: The present invention relates to a photon scanning apparatus comprising a photon source (2) to emit a photon beam (4), a photon detector (6) to detect photons emitted from the photon source (2). The photon source (2) is adapted to emit the photon beam (4) in accordance with a predetermined pulse width modulation scheme at a predetermined flux rate, wherein the pulse width modulation scheme defines pulse widths of the photon beam (4) for respective positions of the photon source (2) and the photon detector around a central axis (R) and an object to be scanned. The photon detector (6) is adapted to start detecting photons with a delay relative to the photon source starting to emit photons and to finish detecting photons prior to the photon source stopping to emit photons. The photon scanning apparatus thus only has to be calibrated for the predetermined flux rate.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: April 20, 2021
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Heiner Daerr, Roland Proksa, Frank Bergner
  • Patent number: 10959688
    Abstract: An imaging system includes a radiation source (108) configured to rotate about an examination region (106) and emit radiation that traverses the examination region. The imaging system further includes an array of radiation sensitive pixels (112) configured to detect radiation traversing the examination region and output a signal indicative of the detected radiation. The array of radiation sensitive pixels is disposed opposite the radiation source, across the examination region. The imaging system further includes a rigid flux filter device (130) disposed in the examination region between the radiation source and the radiation sensitive detector array of photon counting pixels. The rigid flux filter device is configured to filter the radiation traversing the examination region and incident thereon. The radiation leaving the rigid flux filter device has a predetermined flux.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: March 30, 2021
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Bernhard Johannes Brendel, Roland Proksa, Thomas Koehler, Ewald Roessl, Heiner Daerr, Michael Grass, Axel Thran
  • Patent number: 10945690
    Abstract: An X-ray imaging apparatus with an interferometer (IF) and an X-ray detector (D). A footprint of the X-ray detector (D) is larger than a footprint of the interferometer (IF). The interferometer is moved in scan motion across the detector (D) whilst the detector (D) remains stationary. Preferably the detector is a 2D full field detector.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: March 16, 2021
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Thomas Koehler, Gerhard Martens, Roland Proksa, Hanns-Ingo Maack, Udo Van Stevendaal, Franz Josef Pfeiffer, Peter Benjamin Theodor Noel, Maximilian Von Teuffenbach
  • Publication number: 20210041580
    Abstract: The present invention relates to a detection device for X-rays, an imaging system and a method for detecting electro-magnetic radiation using a detection device for X-rays, wherein an estimate of an incomplete measurement is acquired prior to a discontinuity of the electromagnetic radiation, wherein the discontinuity is a change or interruption in a beam or in an intensity of the electromagnetic radiation.
    Type: Application
    Filed: February 25, 2019
    Publication date: February 11, 2021
    Inventors: Roger STEADMAN BOOKER, Roland PROKSA
  • Publication number: 20200397387
    Abstract: The present invention relates to a method (500) for determining a spectral scan protocol for acquiring a computed tomography (CT) image using a CT scanner and a corresponding apparatus (600). The method (500) comprises the steps of defining (510) a conventional scan protocol having scan restrictions for acquiring a conventional CT image; determining (520) a spectral scan protocol comprising a proportion of a first acquisition mode (201) and a proportion of a second acquisition mode (202), wherein the spectral scan protocol resembles the conventional scan protocol; and determining (520) the proportion of the first acquisition mode (201) and the proportion of the second acquisition mode (202) so that the scan restrictions of the conventional scan protocol are met. The method (500) and corresponding apparatus allows the determination of spectral scan protocols which reduce spectral scan mode restrictions.
    Type: Application
    Filed: August 29, 2018
    Publication date: December 24, 2020
    Inventor: ROLAND PROKSA
  • Publication number: 20200390413
    Abstract: An image signal processing system (ISP) comprising an input interface (IN) for receiving photon counting projection data acquired by an X-ray imaging apparatus (IA) having a photon counting detector (D). A calibration data memory (CMEM) of the system holds calibration data. The calibration data encodes photon counting data versus path lengths curves for different energy thresholds of i) said detector (D) or ii) of a different detector. At least one of said curves is not one-to-one. A path length convertor (PLC) of the system converts an entry in said photon counting projection data into an associated path length based on said calibration data.
    Type: Application
    Filed: June 29, 2017
    Publication date: December 17, 2020
    Inventors: Ewald ROESSL, Roger STEADMAN, Christoph HERRMANN, Roland PROKSA
  • Patent number: 10835193
    Abstract: A source grating structure (G0) for interferometric X-ray imaging cable of generating a non-uniform intensity profile behind a surface (S) of the grating structure when exposed to X-ray radiation.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: November 17, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Thomas Koehler, Roland Proksa
  • Publication number: 20200352535
    Abstract: The present invention relates to a CT imaging system as well as a method for CT imaging is provided. For CT imaging, in practice a scout scan and a main scan of a human subject may be performed. It has been found that a detector signal, provided by a detector which detects the X-ray radiation during the scout scan, may be used on the one hand for determining a respective scout image and on the other hand to determine the bone mineral density of the human subject. Although the scout scan is usually primarily performed for determining the scout image, it is of advantage, if the detector used for detecting the X-ray radiation during the scout scan is formed and/or configured to detect X-ray radiation of a first energy spectrum and to detect X-ray radiation of a different, second energy spectrum. In this case, the detector can provide more precise information about the scout region of the human subject and resulting therefrom in a more precise determination of the bone mineral density.
    Type: Application
    Filed: December 12, 2017
    Publication date: November 12, 2020
    Inventors: Roland PROKSA, Frank Josef PFEIFFER, Peter Benjamin Theodor NOEL, Thomas BAUM
  • Patent number: 10813600
    Abstract: A method of an image processing apparatus for identifying a type of adipose body tissue within a subject, based on performing a spectral computed tomography (CT) scan of a region of interest of the subject; and using a combination of different image processing techniques to differentiate between at least two adipose tissue types within the region of interest.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: October 27, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Roland Proksa, Heiner Daerr, Daniela Franz
  • Patent number: 10806422
    Abstract: The present invention relates to an apparatus for generating X-rays. It is described to produce (210) with a power supply (30) a voltage. A cathode (22) of an X-ray source (20) is positioned (220) relative to an anode (24) of the X-ray source. Electrons are emitted (230) from the cathode. Electrons emitted from the cathode interact (240) with the anode with energies corresponding to the voltage. X-rays are generated (250) from the anode, wherein the electrons interact with the anode to generate the X-rays. The X-ray source is controlled (260), such that a plurality of first X-ray pulses is generated each having a first X-ray flux, wherein the first X-ray pulses are temporally separated from each other. The X-ray source is controlled (270), such that a least one second X-ray pulse is generated having a second X-ray flux that is substantially less than the first X-ray flux, wherein the at least one second X-ray pulse is generated temporally between consecutive pulses of the first X-ray pulses.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: October 20, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Roland Proksa, Daniela Muenzel
  • Publication number: 20200319121
    Abstract: The present invention relates to a photon scanning apparatus comprising a photon source (2) to emit a photon beam (4), a photon detector (6) to detect photons emitted from the photon source (2). The photon source (2) is adapted to emit the photon beam (4) in accordance with a predetermined pulse width modulation scheme at a predetermined flux rate, wherein the pulse width modulation scheme defines pulse widths of the photon beam (4) for respective positions of the photon source (2) and the photon detector around a central axis (R) and an object to be scanned. The photon detector (6) is adapted to start detecting photons with a delay relative to the photon source starting to emit photons and to finish detecting photons prior to the photon source stopping to emit photons. The photon scanning apparatus thus only has to be calibrated for the predetermined flux rate.
    Type: Application
    Filed: May 2, 2018
    Publication date: October 8, 2020
    Inventors: Heiner DAERR, Roland PROKSA, Frank BERGNER
  • Patent number: 10791615
    Abstract: The present invention relates to an apparatus for generating X-rays. It is described to produce (210) with a power supply (40) at least two voltages between at least one cathode (20) and an anode (30), wherein the at least two voltages comprises a first voltage and a second voltage. The at least one cathode is positioned relative to the anode. Electrons are emitted (220) from the at least one cathode. Electrons emitted from the at least one cathode are interacted (230) with the anode with energies corresponding to the at least two voltages. X-rays are generated (230) from the anode, wherein the electrons interact with the anode to generate the X-rays. First X-rays are generated when the power supply produces the first voltage and second X-rays are generated when the power supply produces the second voltage. The power supply is controlled (250), such that a ratio between the first X-rays and the second X-rays is controllable.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: September 29, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Lester Donald Miller, Nirmal Soni, Rolf Karl Otto Behling, Roland Proksa, Dionys Van De Ven
  • Patent number: 10736590
    Abstract: A method includes receiving radiation with a hybrid data detection system of an imaging system. The hybrid data detection system includes a hybrid data detector array with a set of spectral detectors and a set of integrating detectors that are arranged along a transverse axis of an examination region. The method further includes generating a set of truncated spectral projections with the first set of spectral detectors. The method further includes estimating a set of spectral projections for the integrating detectors. The method further includes combining the set of truncated spectral projections and the estimated set of spectral projections. The method further includes estimating a set of spectral projections based on the combined set to produce a complete set of spectral projections. The method further includes processing the complete set of spectral projections to generate volumetric image data.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: August 11, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Dirk Schafer, Michael Grass, Thomas Koehler, Roland Proksa
  • Publication number: 20200251236
    Abstract: An anti-scatter grid (ASG) for X-ray imaging with a surface (S) formed from a plurality of strips (LAM). The plurality of strips including at least two guard strips (Li,L i+1) that are thicker in a direction parallel to said surface than one or more strips l(i) of said plurality of strips (LAM). The one or more strips (li) being situated in between said two guard strips (Li,Li+1).
    Type: Application
    Filed: August 14, 2018
    Publication date: August 6, 2020
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: HEINER DAERR, ROLAND PROKSA
  • Patent number: 10667769
    Abstract: The invention relates to a method of Computed Tomography imaging comprising: a. Performing a single acquisition of image data from at least two contrast agents into a blood vessel network, a first contrast agent among said at least two contrast agents having been in said blood vessel network for a longer time than a second contrast agent among said at least two contrast agents, b. Processing said image data using K-Edge detection and/or iodine delineation to separate data associated with each contrast agents in order to obtain a concentration map of each contrast agent, c. Determining from said image data a first part of the blood vessel network comprising both the first contrast agent and the second contrast agent, and a second part of the blood vessel network comprising only the first contrast agent, d. Calculating a partial blood volume map of the first part of the blood vessel network based on the total amount of second contrast agent and on the concentration map of the second contrast agent, e.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: June 2, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Roland Proksa, Heiner Daerr, Daniela Muenzel, Peter Noel
  • Patent number: 10631808
    Abstract: A biomarker of lung condition can conventionally be obtained using a spirometer. A spirometer provides an estimate of the volume of air expelled by the lungs. This is a rather indirect biomarker of the staging of a lung condition, because a reduction in lung volume may only manifest itself at a point where symptoms are well advanced. A lung condition such as Chronic Obstructive Pulmonary Disorder (COPD) is typically not visible on conventional X-ray attenuation images, because the relevant tissue (alveoli-bearing microstructured lung tissue) contains a lot of air. The X-ray dark-field can successfully indicate microstructure, such as lung alveoli. Therefore, imaging the lungs using the dark-field can provide information on the status of COPD.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: April 28, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Roland Proksa, Jens Von Berg
  • Patent number: 10610183
    Abstract: The invention relates to a system (1) for assisting in assessing a state of a subject's lung. The system is adapted to process a dark field image, which comprises dark field values for different spatial positions and for different breathing state values, such that a differentiation image is generated by differentiating the provided dark field image with respect to the breathing state values. This differentiation can lead to a functional image which can be used for detecting changes of air-soft tissue interfaces, which might be caused by a lung disease, with high sensitivity. This allows for an improved assisting in assessing a state of a subject's lung.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 7, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Roland Proksa
  • Patent number: 10580138
    Abstract: An image processing system comprising: an input port (IN) for receiving two input images acquired of an object. Respective contrast in said images encodes information on different physical properties of the object. The images being converted from a signal detected at a detector (D) of an imaging apparatus (IM). A differentiator of the image processing system forms respective differences from pairs of image points from the respective input images. An edge evaluator (EV) computes, based on said differences, an edge score for at least one of said pairs of image points. The score is based on a measure that represents or is derivable from a conditional noise likelihood function. The likelihood function is based on a probability density that models noise for said signal. Said score is output through an output port (OUT).
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: March 3, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Thomas Koehler, Roland Proksa
  • Patent number: 10568593
    Abstract: An imaging system (1400) includes a first and a second focal spot (1410I and 1410N), a first pre-patient radiation beam filter (1416) disposed between the first focal spot and the examination region and having a first profile and a second pre-patient radiation beam filter (1416N) disposed between the second focal spot and the examination region and having a second profile, and a source controller (1412) that controls an operation of the focal spots by modulating the operation during a scan based on at least one of an angular position of focal spots, a shape of a region of interest of subject or object being scanned, or based on a change in size between two adjacent regions of the subject or object being scanned.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: February 25, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Thomas Koehler, Roland Proksa