公开(公告)号：US20170258411A1

公开(公告)日：2017-09-14

申请号：US15507396

申请日：2015-09-11

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas KOEHLER ,  Michael GRASS ,  Roland PROKSA

IPC: A61B6/02 ,  A61B6/04 ,  A61B6/00 ,  A61B6/03

CPC classification number: A61B6/022 ,  A61B6/035 ,  A61B6/0407 ,  A61B6/4007 ,  A61B6/4014 ,  A61B6/405 ,  A61B6/481 ,  A61B6/486 ,  A61B6/504

Abstract: The present invention relates to a stereo tube radiation imaging system in which radiation emitted from each radiation source covers a different area of the detector surface. Furthermore, the present invention relates to a stereo tube imaging method wherein both radiation sources are operated independently and each cover part of the detector surface area. This is advantageous in that it may reduce radiation dose compared to known stereo tube imaging and introduces new possibilities for stereo tube imaging, such as improved object tracking within a body.

公开(公告)号：US20170181716A1

公开(公告)日：2017-06-29

申请号：US15309483

申请日：2015-05-13

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas KOEHLER ,  Roland PROKSA

IPC: A61B6/00 ,  A61B6/06 ,  A61B6/03

CPC classification number: A61B6/4021 ,  A61B6/032 ,  A61B6/06 ,  A61B6/4007 ,  A61B6/4035

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.

公开(公告)号：US20170079605A1

公开(公告)日：2017-03-23

申请号：US15312372

申请日：2015-05-13

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roland PROKSA ,  Thomas KOEHLER

IPC: A61B6/00 ,  A61B6/03

CPC classification number: A61B6/5205 ,  A61B6/032 ,  A61B6/482 ,  G01T1/2985 ,  G01T1/36

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：US20200319121A1

公开(公告)日：2020-10-08

申请号：US16305446

申请日：2018-05-02

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Heiner DAERR ,  Roland PROKSA ,  Frank BERGNER

IPC: G01N23/046 ,  G01T7/00 ,  A61B6/03

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.

公开(公告)号：US20190313991A1

公开(公告)日：2019-10-17

申请号：US16348269

申请日：2017-11-09

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roland PROKSA

IPC: A61B6/00

Abstract: The present invention relates to an apparatus for generating multi energy data from phase contrast imaging data. It is described to provide (210) phase contrast X-ray image data of a region of interest of an object. Attenuation X-ray image data of the region of interest of the object is also provided (220). A first basis data set is generated (230) from the phase contrast X-ray image data. A second basis data set is generated (240) from the phase contrast X-ray image data and the attenuation X-ray image data.

公开(公告)号：US20190290222A1

公开(公告)日：2019-09-26

申请号：US16316446

申请日：2017-07-13

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roland PROKSA ,  Heiner DAERR ,  Daniela FRANZ

IPC: A61B6/03 ,  G06T7/00

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.

公开(公告)号：US20180289350A1

公开(公告)日：2018-10-11

申请号：US15756602

申请日：2016-09-01

Applicant: KONINKLIJKE PHILIPS N.V. ,  TECHNISCHE UNIVERSITAET MUENCHEN

Inventor： Roland PROKSA ,  Alexander André FINGERLE ,  Daniela MUENZEL ,  Franz Josef PFEIFFER ,  Thomas KOEHLER ,  Peter Benjamin Theodor NOEL ,  Maximilian VON TEUFFENBACH ,  Julia HERZEN ,  Konstantin WILLER

IPC: A61B6/00 ,  A61B6/03

Abstract: A method of a virtual X-ray colonoscopy includes scanning (204) a dark-field contrast (144) insufflated colon lumen (140) with an X-ray scanner (110) configured for dark-field-contrast, which generates dark-field-contrasted projection data and attenuation projection data. The dark-field-contrasted projection data and the attenuation projection data are reconstructed (206) into one or more dark-field-contrasted images (148).

公开(公告)号：US20170273647A1

公开(公告)日：2017-09-28

申请号：US15509042

申请日：2015-09-16

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Dirk SCHAFER ,  Michael GRASS ,  Thomas KOEHLER ,  Roland PROKSA

IPC: A61B6/00 ,  A61B6/03

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.

公开(公告)号：US20170243378A1

公开(公告)日：2017-08-24

申请号：US14917615

申请日：2015-07-29

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas KOEHLER ,  Frank BERGNER ,  Roland PROKSA

IPC: G06T11/00

CPC classification number: G06T11/006 ,  G06T2211/408 ,  G06T2211/424

Abstract: The present invention relates to a device (100) for iterative reconstruction of images recorded by at least two imaging methods, the device comprising: an extraction module (10), which is configured to extract a first set of patches from a first image recorded by a first imaging method and to extract a second set of patches from a second image recorded by a second imaging method; a generation module (20), which is configured to generate a set of reference patches based on a merging of a first limited number of atoms for the first set of patches and of a second limited number of atoms for the second set of patches; and a regularization module (30), which is configured to perform a regularization of the first image or the second image by means of the generated set of reference patches.

公开(公告)号：US20170231590A1

公开(公告)日：2017-08-17

申请号：US15519176

申请日：2015-10-12

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roland PROKSA ,  Thomas KOEHLER ,  Michael GRASS

IPC: A61B6/00 ,  A61B6/03

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.