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公开(公告)号：US20220365230A1
公开(公告)日：2022-11-17
申请号：US17780500
申请日：2020-12-02
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROGER STEADMAN BOOKER , WALTER RUETTEN , MATTHIAS SIMON
IPC: G01T1/20
Abstract: The present invention relates to an X-ray detector (10) comprising two or more scintillator layers, comprising: a first scintillator layer (20); a second scintillator layer (30); a first photodiode array (40); a second photodiode array (50); and at least one light emitting layer (60). 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 scintillators layer. The first photodiode array 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. The second photodiode array is configured to detect at least some of the light emitted by the second scintillator layer. The at least one light emitting layer is 10 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.
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公开(公告)号：US20200183023A1
公开(公告)日：2020-06-11
申请号：US16623462
申请日：2018-06-21
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROGER STEADMAN BOOKER , CHRISTOPH HERRMANN
IPC: G01T1/24
Abstract: The invention relates to a radiation detector (1), an imaging system and a related method for radiation detection. The detector comprises a direct conversion material (2) for converting x-ray and/or gamma radiation into electron-hole pairs by direct photon-matter interaction. The detector comprises an anode (3) and a cathode (4) arranged on opposite sides of the direct conversion material (2) such that the electrons and holes can respectively be collected by the anode and cathode. The cathode is substantially transparent to infrared radiation. The detector comprises a light guide layer (5) on the cathode at a side of the cathode that is opposite of the direct conversion material, in which the light guide layer is adapted for distributing infrared radiation over the direct conversion material. The detector comprises a reflector layer (6) arranged on the light guide layer (5) at a side opposite of the cathode, in which the reflector layer is adapted for substantially reflecting infrared radiation. The detector comprises at least one light emitter (7), abutting on and/or integrated in the light guide layer (5), for emitting infrared radiation into the light guide layer.
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公开(公告)号：US20200064496A1
公开(公告)日：2020-02-27
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
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.
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公开(公告)号：US20220187477A1
公开(公告)日：2022-06-16
申请号：US17436093
申请日：2020-03-04
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROGER STEADMAN BOOKER , CHRISTOPH HERRMANN
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.
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公开(公告)号：US20210356608A1
公开(公告)日：2021-11-18
申请号：US17274258
申请日：2019-09-10
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： JOHANNES WILHELMUS MARIA JACOBS , ROLF KARL OTTO BEHLING , ROGER STEADMAN BOOKER , GEREON VOGTMEIER , ONNO JAN WIMMERS
IPC: G01T1/20 , G01T1/24 , H01L25/04 , H01L31/0256
Abstract: The present invention relates to a radiation detector (100) comprising: i) a substrate (110); ii) a sensor, which is coupled to the substrate, the sensor comprising a first array (120) of sensor pixels, a second array (130) of signal read-out elements, and an electronic circuitry which is configured to provide image data based on signals received from the signal read-out elements; iii) a transducer, which is coupled to the substrate and to the sensor, the transducer comprising a third array (140) of subpixels, wherein at least two subpixels are assigned to one sensor pixel; wherein the second array of signal read-out elements and the third array of subpixels correspond to each other; wherein each of the subpixels comprises a radiation conversion material.
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Patent Agency Ranking
公开(公告)号：US20190304616A1
公开(公告)日：2019-10-03
申请号：US16307675
申请日：2017-06-08
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： THOMAS KOEHLER , ROGER STEADMAN BOOKER , MATTHIAS SIMON , WALTER RUETTEN , HERFRIED KARL WIECZOREK
IPC: G21K1/02 , G01N23/041 , A61B6/00
Abstract: The invention relates to an analyzing grid for phase contrast imaging and/or dark-field imaging, a detector arrangement for phase contrast imaging and/or dark-field imaging comprising such analyzing grid, an X-ray imaging system comprising such detector arrangement, a method for manufacturing such analyzing grid, a computer program element for controlling such analyzing grid or detector arrangement for performing such method and a computer readable medium having stored such computer program element. The analyzing grid comprises a number of X-ray converting gratings. The X-ray converting gratings are configured to convert incident X-ray radiation into light or charge. The number of X-ray converting gratings comprises at least a first X-ray converting grating and a second X-ray converting grating. Further, the X-ray converting gratings each comprise an array of grating bars, wherein the grating bars within each X-ray converting grating are arranged mutually displaced from each other in a direction perpendicular to the incident X-ray radiation by a specific displacement pitch. Further, the grating bars of the first X-ray converting grating are arranged mutually displaced from the grating bars of the second X-ray converting grating in the direction perpendicular to the incident X-ray radiation by the displacement pitch divided by the number of X-ray converting gratings.
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公开(公告)号：US20210382188A1
公开(公告)日：2021-12-09
申请号：US17053890
申请日：2019-05-07
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROGER STEADMAN BOOKER , CHRISTOPH JAN HERRMANN , KLAUS ERHARD , BERNHARD JOHANNES BRENDEL , HEINER DAERR , ARTUR SOSSIN , AXEL THRAN
Abstract: A radiation detector (100) adapted for detecting leakage currents is disclosed and comprises a direct conversion material (101) for converting incident radiation, at least one first electrode (108) and a plurality of second electrodes (103) connected to surfaces of the direct conversion material (101) for collecting each generated charges upon application of an electric field, at least one current measurement device (201), and a plurality of signal processing chains (210, 220, 230). Each signal processing chain comprises a readout unit (215, 216, 217, 218, 219) for discriminating between energy values with respect to the incident radiation, and a switching element (214) for sending signals on a first signal path (2141) electrically connecting one of the plurality of second electrodes with the readout unit, or on a second signal path electrically connecting the one of the plurality of second electrodes with an input to one of the at least one current measurement devices. A plurality of switching elements is configured to send signals on the second signal path for measuring a leakage current received at a corresponding plurality of second electrodes of the detector in the absence of incident radiation.
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公开(公告)号：US20210378081A1
公开(公告)日：2021-12-02
申请号：US17395571
申请日：2021-08-06
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROGER STEADMAN BOOKER , GEREON VOGTMEIER
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.
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公开(公告)号：US20210072167A1
公开(公告)日：2021-03-11
申请号：US16642292
申请日：2018-08-20
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROGER STEADMAN BOOKER , WALTER RUETTEN
IPC: G01N23/046 , G01T1/20 , H01L27/146
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.
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10.发明申请公开(公告)号：US20190219713A1
公开(公告)日：2019-07-18
申请号：US16335819
申请日：2018-08-03
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROGER STEADMAN BOOKER , EWALD ROESSL , WALTER RUETTEN
Abstract: In a conventional phase-contrast X-ray imaging system, a source grating G0 generates an array of partially coherent line sources which illuminate an object and thereafter phase grating G1. The periodicity in the phase grating is self-imaged at certain instances further away from the X-ray source and sampled by a mechanically movable third absorptive analyzer grating G2 before the demodulated fringe intensity is detected by a conventional X-5 ray detector. This application proposes to directly demodulate the fringe intensity using a structured scintillator having a plurality of slabs in alignment with sub-pixels of an optical detector layer, in combination with electronic signal read-out approaches. Therefore, a mechanically movable third absorptive analyzer grating G2 can be omitted from a phase-contrast X-ray imaging system.
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