公开(公告)号：US11589448B2

公开(公告)日：2023-02-21

申请号：US17395571

申请日：2021-08-06

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roger Steadman Booker ,  Gereon Vogtmeier

IPC: H05G1/52 ,  H01J35/14 ,  H01J35/06 ,  H05G1/56

Abstract: An X-ray source for emitting an X-ray beam is proposed. The X-ray source comprises an anode and an emitter arrangement comprising a cathode for emitting an electron beam towards the anode and an electron optics for focusing the electron beam at a focal spot on the anode. The X-ray source further comprises a controller configured to determine a switching action of the emitter arrangement and to actuate the emitter arrangement to perform the switching action, the switching action being associated with a change of at least one of a position of the focal spot on the anode, a size of the focal spot, and a shape of the focal spot. The controller is further configured to predict before the switching action is performed, based on the determined switching action, the size and the shape of the focal spot expected after the switching action. Further, the controller is configured to actuate the electron optics to compensate for a change of the size and the shape of the focal spot induced by the switching action.

公开(公告)号：US10912527B2

公开(公告)日：2021-02-09

申请号：US16772530

申请日：2018-12-27

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Gereon Vogtmeier ,  Roger Steadman Booker

IPC: A61B6/00 ,  A61B6/03

Abstract: The present invention relates to an apparatus for generating dual energy X-ray imaging data. It is described to position (210) an X-ray detector relative to an X-ray source such that at least a part of a region between the X-ray source and the X-ray detector is an examination region for accommodating an object. A grid filter is positioned (220) between the examination region and the X-ray source. The X-ray source produces (230) a focal spot on a target to produce X-rays. The X-ray source moves (240) the focal spot in a first direction across a surface of the target. The grid filter has a structure in a first orientation such that the movement of the focal spot in the first direction results in an associated change in an intensity of X-rays transmitted by the grid filter. The X-ray source moves (250) the focal spot in a second direction across the surface of the target that is orthogonal to the first direction. The grid filter has a structure in a second orientation orthogonal to the first orientation such that the movement of the focal spot in the second direction results in an associated change in an energy spectrum of X-rays transmitted by the grid filter. The X-ray detector detects (260) at least some of the X-rays transmitted by the grid filter.

公开(公告)号：US10444381B2

公开(公告)日：2019-10-15

申请号：US15778847

申请日：2016-12-02

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roger Steadman Booker ,  Carolina Ribbing ,  Walter Ruetten ,  Gereon Vogtmeier

IPC: G01J1/00 ,  G01T1/24 ,  G01T1/161 ,  G01T1/17 ,  G01T1/20

Abstract: The present invention relates to a radiation detector, in particular a direct conversion radiation detector. To provide for simple distribution of provided high voltage the radiation detector comprises a plurality of detector modules (10, 20) arranged adjacent to each other. Each detector module comprises a sensor layer (14, 24) for converting incident radiation (100) into electrical charges, a first electrode (15, 25) deposited on a first surface of the sensor layer facing the incident radiation (100), a second electrode (16, 26) deposited on a second surface of the sensor layer opposite the first surface, a readout electronics (12, 22) in electrical contact with the second electrode, and a carrier (13, 23) for carrying the sensor layer and the readout electronics. The radiation detector further comprises an electrically conductive conduction layer (30, 32, 50) and an anti-scatter arrangement (40), which are arranged on top of each other and cover the plurality of detector modules on the side facing the incident radiation (100).

公开(公告)号：US09753156B2

公开(公告)日：2017-09-05

申请号：US14768231

申请日：2014-02-28

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Frank Verbakel ,  Klaus Juergen Engel ,  Antonius Johannes Maria Nellissen ,  Herfried Karl Wieczorek ,  Eric Cornelius Egbertus Van Grunsven ,  Ira Micah Blevis ,  Roger Steadman Booker

IPC: G01T1/24 ,  G01N23/02

CPC classification number: G01T1/244 ,  G01N23/02 ,  G01T1/24

Abstract: The invention relates to a detector (6) for detecting radiation, especially x-ray radiation used in a computed tomography system. The detector comprises a direct conversion material (9) for converting radiation into electrons and holes, which are used for generating an electrical detection signal. The direct conversion material is illuminated with illumination light being broadband visible and/or broadband infrared light for reducing, in particular, eliminating, a polarization of the direct conversion material, which may occur when being traversed by the radiation to be detected and which may reduce the detection performance. By reducing the polarization of the direct conversion material the detection performance can be improved.

公开(公告)号：US09625589B2

公开(公告)日：2017-04-18

申请号：US14421303

申请日：2013-07-15

Applicant: KONINKLIJKE PHILIPS N.V. ,  PHILIPS DEUTSCHLAND GMBH

Inventor： Ewald Roessl ,  Daerr Heiner ,  Roger Steadman Booker

IPC: H05G1/60 ,  G01T1/24 ,  G01N23/04

CPC classification number: G01T1/247 ,  G01N23/046 ,  G01T1/171 ,  G01T1/248

Abstract: The invention relates to a method and an X-ray detector (100) for detecting incident X-ray photons (X). The X-ray detector (100) comprises at least one sensor unit (105) in which X-ray photons (X) are converted into sensor signals (s) and at least one flux sensor (104) for generating a flux signal (f) related to the flux of photons (X). The sensor signals (s) are corrected based on the flux signal (f). In a preferred embodiment, the sensor signals (s) represent a spectrally resolved pulse counting. The flux sensor (104) may be integrated into an ASIC (103) that is coupled to the sensor unit (105).

公开(公告)号：US12138089B2

公开(公告)日：2024-11-12

申请号：US17781429

申请日：2020-12-09

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Gereon Vogtemeir ,  Roger Steadman Booker ,  Albert Garcia I Tormo ,  Klaus Jürgen Engel

IPC: A61B6/03 ,  A61B6/00 ,  A61B6/58 ,  G06T11/00

Abstract: The present invention relates to spectral correction. A spectral correction apparatus is described that is configured to identify a voltage fluctuation in the X-ray tube and to parameterize the high voltage fluctuation to correct the effective X-ray spectrum per individual frame.

公开(公告)号：US11988785B2

公开(公告)日：2024-05-21

申请号：US17436093

申请日：2020-03-04

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roger Steadman Booker ,  Christoph Herrmann

IPC: G01T1/17 ,  A61B6/00 ,  A61B6/42

CPC classification number: G01T1/171 ,  A61B6/4241

Abstract: The present invention relates to photon counting. In particular, a photon-counting data acquisition module is provided. The photon-counting data acquisition module comprises a signal input unit and one or more data acquisition channels, each channel adapted for converting at least one train of pulses received from the signal input unit to a counter signal. Each data acquisition channel comprises a pulse maximum identifier and a discriminator/counter pair comprising a discriminator and a counter. The pulse maximum identifier is configured to identify a maximum of a pulse in the at least one received train of pulses. The discriminator is configured to be triggered, by a detection of a maximum of a pulse in the at least one received train of pulses, to compare the pulse with at least one signal threshold to generate the counter signal. Alternatively, the counter is configured to be enabled in response to a detection of a maximum of a pulse to generate the counter signal.

公开(公告)号：US11662482B2

公开(公告)日：2023-05-30

申请号：US17780500

申请日：2020-12-02

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roger Steadman Booker ,  Walter Ruetten ,  Matthias Simon

IPC: A61B6/00 ,  A61B6/03 ,  G01T1/20

CPC classification number: G01T1/20181 ,  A61B6/032 ,  A61B6/4208 ,  A61B6/4241 ,  A61B6/482 ,  G01T1/2002 ,  G01T1/2006 ,  G01T1/2008 ,  G01T1/2018 ,  G01T1/20183 ,  G01T1/20184 ,  G01T1/20186 ,  G01T1/20187 ,  G01T1/20188

Abstract: An X-ray detector comprises a first scintillator layer, a second scintillator layer, a first photodiode array, a second photodiode array, and at least one light emitting layer. The first scintillator layer is configured to absorb X-rays from an X-ray pulse and emit light. The first photodiode array is positioned adjacent to the first scintillator layer and is configured to detect at least some of the light emitted by the first scintillator layer. The second scintillator layer is configured to absorb X-rays from the X-ray pulse and emit light. The second photodiode array is positioned adjacent to the second scintillator layer and is configured to detect at least some of the light emitted by the second scintillator layer. The at least one light emitting layer is configured to emit radiation such that at least some of the emitted radiation irradiates the first photodiode array, and at least some of the emitted radiation irradiates the second photodiode array.

公开(公告)号：US11340359B2

公开(公告)日：2022-05-24

申请号：US16609768

申请日：2018-04-24

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christoph Herrmann ,  Roger Steadman Booker ,  Jakob Wijnand Mulder ,  Matthias Simon ,  Jacques Jules Van Oekel

IPC: G01T1/20 ,  A61B6/03

Abstract: A detector includes a first detection layer (1141) and a second detector layer (1142). The first and second detection layers include a first and second scintillator (204, 7041) (216, 7042), a first and second active photosensing region (210, 7081) (220, 7082), a first portion (206, 7261) of a first substrate (208, 7061), and a second portion (218, 7262) of a second substrate (208, 7062). An imaging system (100) includes a radiation source (110), a radiation sensitive detector array (108) comprising a plurality of multi-layer detectors (112), and a reconstructor (118) configured to reconstruct an output of the detector array and produces an image. The detector array includes a first detection layer and a second detector layer with a first and second scintillator, a first and second active photosensing region, a first portion of a first substrate, and a second portion of a second substrate.

公开(公告)号：US11181488B2

公开(公告)日：2021-11-23

申请号：US16642292

申请日：2018-08-20

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roger Steadman Booker ,  Walter Ruetten

IPC: G01T1/20 ,  G01T1/29 ,  G01N23/04 ,  H01L27/146 ,  G01N23/046 ,  G01T1/202

Abstract: A computed tomography (CT) detector array (120) includes a monolithic scintillator (124). The monolithic scintillator includes at least a first scintillator region (202), a second scintillator region (206), and an optically reflective barrier (210) therebetween. The detector array is configured to detect X-ray radiation traversing an examination region and impinging the monolithic scintillator and generate first projection data indicative of an energy of x-ray radiation absorbed by the first scintillator region and second projection data indicative of an energy of x-ray radiation traversing the first scintillator and absorbed by the second scintillator region.