-
公开(公告)号：US20230320687A1
公开(公告)日：2023-10-12
申请号：US18025145
申请日：2021-09-07
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROLAND PROKSA
Abstract: A controller and method are for configuring operation of a kVp-s witching spectral CT imaging apparatus which, in at least one mode, aims to mimic the user-side operating workflow of a conventional non-spectral CT scanner. The controller receives user-defined settings associated with operation of a non-spectral CT system, comprising a desired peak tube voltage and desired tube current. Based on these user-specified inputs, the controller performs a conversion procedure to derive a set of spectral CT operating parameters which are estimated to result in administration of the same dose of X-ray radiation over a single kVp switching cycle as would be administered by the conventional scanner over a same time duration. Thus, the user can acquire CT projection and image data using a spectral CT scanner, without a need to change their own operating workflow, and furthermore in a way that will administer the same radiographic density as they would expect to achieve with the same user-specified settings on a conventional scanner.
-
公开(公告)号：US20250057496A1
公开(公告)日：2025-02-20
申请号：US18720008
申请日：2022-12-19
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROLAND PROKSA , THOMAS KOEHLER , MICHAEL GRASS , CHRISTIAN WUELKER , SEBASTIAN WILD
Abstract: The present invention relates to a spectral X-ray CT imaging system (10), comprising: a spectral X-ray CT imaging unit (20); a processing unit (30); and an output unit (40). The spectral X-ray CT imaging unit comprises an X-ray tube (22) and a dual layer X-ray detector (24), and wherein a body portion of a subject to be examiner can be located between the X-ray tube and the dual layer X-ray detector. The spectral X-ray CT imaging unit is configured to acquire an overall scan of the body portion comprising a plurality of acquisitions at different projections angles. The processing unit is configured to utilize information on the body portion for each projection of the different projections angles. The processing unit is configured to determine a voltage for the X-ray tube for each acquisition of the plurality of acquisitions, wherein the determination for each acquisition comprises utilization of the corresponding information on the body portion for the projection associated with that acquisition. The processing unit is configured to control the spectral X-ray CT imaging unit to carry out an implemented overall scan of the body portion, wherein the control comprises controlling the X-ray tube to operate at the determined X-ray tube voltage for each acquisition of the plurality of acquisitions at the different projections angles. The processing unit is configured to receive data from the dual layer X-ray detector for each acquisition of the implemented overall scan. The processing unit is configured to implement a machine learning algorithm to determine material decomposition imagery of the body portion, wherein the determination comprises utilization of the data from the dual layer X-ray detector for each acquisition of the implemented overall scan and the determined X-ray tube voltage for each acquisition of the implemented overall scan. The output unit is configured to output the material decomposition imagery of the body portion.
-
公开(公告)号：US20250044467A1
公开(公告)日：2025-02-06
申请号：US18719993
申请日：2022-12-17
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROLAND PROKSA
Abstract: The invention provides a method for operating a CT imaging system comprising a gantry having a detector and a rotary encoder attached to the gantry. The method comprises modelling, by means of an adaptive digital phase-locked loop, A-DPLL, a gantry rotation of the gantry, the A-DPLL configured to minimize the difference between an actual gantry angle and a modeled gantry angle, and generating, for each of a plurality of predetermined values of the modeled gantry angle, a trigger pulse for the detector. The actual gantry angle is obtained by detecting a gantry angle by means of the rotary encoder and adapting the detected gantry angle to account for a deviation of the actual rotary encoder characteristics from expected rotary encoder characteristics, the adapting being performed using an angular pattern of the rotary encoder.
-
4.发明申请公开(公告)号：US20200033484A1
公开(公告)日：2020-01-30
申请号：US16498532
申请日：2018-03-27
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROLAND PROKSA
Abstract: The present invention relates to a detector arrangement for an X-ray phase contrast system (5), the detector arrangement (1) comprising: a scintillator (11); an optical grating (12); and a detector (13); wherein the optical grating (12) is arranged between the scintillator (11) and the detector (13); wherein the scintillator (11) converts X-ray radiation (2) into optical radiation (3); wherein the IN optical grating (12) is configured to be an analyzer grating being adapted to a phase-grating (21) of an X-ray phase contrast system (5); wherein the optical path between the optical grating (12) and the scintillator (11) is free of focussing elements for optical radiation. The present invention further relates to a method (100) for performing X-ray phase contrast imaging with a detector arrangement (1) mentioned above. The invention avoids the use of an X-ray absorption grating as G2 grating in an X-ray phase contrast interferometer system.
-
5.发明申请公开(公告)号：US20190336086A1
公开(公告)日：2019-11-07
申请号：US16463857
申请日：2017-11-30
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROLAND PROKSA , THOMAS KOEHLER
Abstract: An interferometer grating support (118) of an imaging system (100) configured for grating-based x-ray imaging includes at least two elongate supports (302) separated from each other by a non-zero distance, wherein the at least two elongate supports have a first end (312) and a second end (316). The grating support further includes a first arc shaped grating (202) affixed to the first end and a second arc shaped grating (204) affixed to a second end (316). A non-transitory computer readable medium is configured with computer executable instructions which when executed by a processor of a computer cause the processor to: move a grating support, which supports G0 and G1 gratings of an interferometer and a bowtie filter, into a region between a low energy photon filter and a beam collimator, which are between a radiation source and an examination region, for a grating-based x-ray imaging scan.
-
Patent Agency Ranking
公开(公告)号：US20180271465A1
公开(公告)日：2018-09-27
申请号：US15763909
申请日：2016-09-30
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROLAND PROKSA , JENS VON BERG
CPC classification number: A61B6/50 , A61B6/461 , A61B6/482 , A61B6/484 , A61B6/5217 , A61B6/5252 , G06T7/0012 , G06T7/11 , G06T7/50 , G06T2207/10116 , G06T2207/30061
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 (alve-oli-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.
-
公开(公告)号：US20220354449A1
公开(公告)日：2022-11-10
申请号：US17636926
申请日：2020-08-17
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： MANUEL PETER VIERMETZ , THOMAS KOEHLER , ROLAND PROKSA , FRANZ JOSEF PFEIFFER
IPC: A61B6/00
Abstract: The present invention relates to a system (10) for X-ray dark-field, phase contrast and attenuation image acquisition. The system comprises an X-ray source (20), an interferometer arrangement (30), an X-ray detector (40), a control unit (50), and an output unit (60). An axis is defined extending from a centre of the X-ray source to a centre of the X-ray detector. An examination region is located between the X-ray source and the X-ray detector. The axis extends through the examination region, and the examination region is configured to enable location of an object to be examined. The interferometer arrangement is located between the X-ray source and the X-ray detector. The interferometer arrangement comprises a first grating (32) and a second grating (34). For a first mode of operation: The control unit is configured to control at least one lateral movement transducer (70) to move the first grating or move the second grating in a lateral position direction perpendicular to the axis. The control unit is configured to control the X-ray detector to acquire image data whilst the first grating and/or second grating is moving. During an exposure time of the X-ray detector the first grating and/or second grating has moved a distance less than a period of the first grating and/or second grating. The control unit is configured to control movement of the first grating and/or second grating such that the image data is acquired whilst the first grating and/or second grating is moving. For the first mode of operation the output unit is configured to output one or more of: dark-field image data, phase contrast image data, and attenuation image data.
-
公开(公告)号：US20210338182A1
公开(公告)日：2021-11-04
申请号：US17282027
申请日：2019-09-27
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： MICHAEL GRASS , ROLAND PROKSA
Abstract: The invention refers to a system for providing a spectral image using a conventional CT system. The system comprises a data providing unit (11) for providing first projection data and second projection data, wherein the first and second projection data have been acquired using different acquisition spectra, wherein the first projection data has been acquired during a scout scan and the second projection data has been acquired during a diagnostic scan, or wherein the first and second projection data have been acquired by a first and second part of the detector, respectively. The first and second part of the detector acquire projection data with different acquisition spectra. A spectral image generation unit (12) generates a spectral image based on the projection data. With this system a spectral image can be provided using a conventional CT system with a decreased acquisition time.
-
公开(公告)号：US20210272338A1
公开(公告)日：2021-09-02
申请号：US17252445
申请日：2019-06-24
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： THOMAS KOEHLER , KEVIN MARTIN BROWN , ROLAND PROKSA
IPC: G06T11/00
Abstract: A reconstruction system includes a decomposer (204) configured to decompose at least two sets of projection data generated via kVp switching between at least two radiation source voltages. Each set corresponds to a different one of the at least two radiation source voltages. The system further includes a spectral channel (206) configured to process the at least two sets of projection data and generate spectral image data. The system further includes a non-spectral channel (208) configured to process the at least two sets of projection data and generate non-spectral image data for a predetermined reference kVp.
-
公开(公告)号：US20210251699A1
公开(公告)日：2021-08-19
申请号：US17270461
申请日：2019-08-28
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROLAND PROKSA , ALEXANDER ANDRÉ FINGERLE
Abstract: A method of spectrally imaging an organ during an image-guided intervention is disclosed. Based on at least one first scan, a first image modality is obtained. A selection of a region of interest is obtained within the first image modality. Based on at least one second spectral scan of the organ, at least three second image modalities are obtained. A contrast value is calculated over the previously selected region of interest for all obtained second image modalities. The second image modality with the largest contrast value is selected for display. Alternatively, image modalities of the organ are displayed over time and the modalities for display are selected according to an imaging protocol which associates a lesion type and timestamp of a spectral scan with a modality having optimal contrast.
-
-
-
-
-
-
-
-
-
Search Results
18
records
(took 0.014 seconds)
