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公开(公告)号：US20230384467A1
公开(公告)日：2023-11-30
申请号：US18250804
申请日：2021-10-29
Applicant: KROMEK LIMITED , UCL Business Limited
Inventor： Alex Cherlin , Ian Baistow , Andras Wirth , Brian Forbes Hutton , Kjell Ake Gustav Erlandsson , Kris Filip Johan Jules Thielemans
CPC classification number: G01T1/242 , G01T1/1647 , G01T1/249
Abstract: A method of processing radiation from a source is described comprising: positioning a detector to receive radiation from the source; positioning a collimator between the source and the detector, wherein the collimator has a plurality of apertures; allowing radiation from the source to pass through the collimator and be incident upon the detector; receiving a plurality of responses each being a response to an interaction with incident radiation occurring within the detector; determining, for each of the plurality of responses, a characteristic of the interaction, wherein the characteristic comprises at least a position and depth of the interaction within the detector; processing the said plurality of responses by simultaneously processing position and depth of interaction data in such manner as to accommodate the effect of multiplexing due to overlap of the projected radiation pathways from multiple apertures in the collimator at the detector on the detected position on the detector. A radiation detection system for the detection of radiation from a source, in particular to perform the method, is also described.
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公开(公告)号：US20190243005A1
公开(公告)日：2019-08-08
申请号：US16329824
申请日：2017-09-06
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Herfried Karl WIECZOREK , Johannes Wilhelmus Maria JACOBS , Herman STEGEHUIS , Alessandro RADAELLI , Christiaan KOK , Peter Lex ALVING
CPC classification number: G01T1/1644 , A61B6/037 , A61B6/06 , A61B6/4233 , A61B6/4258 , A61B6/4291 , A61B6/4417 , A61B6/4441 , A61B6/486 , A61B6/487 , A61B6/5235 , G01T1/1611 , G01T1/1647 , G01T1/1648
Abstract: The invention relates to a combined imaging detector for detection of gamma and x-ray quanta comprising an x-ray detector (31) for generating x-ray detection signals in response to detected x-ray quanta and a gamma detector (32) for generating gamma detection signals in response to detected gamma quanta. The x-ray detector (31) and the gamma detector (32) are arranged in a stacked configuration along a radiation-receiving direction (33). The gamma detector (32) comprises a gamma collimator plate (320) comprising a plurality of pinholes (321), and a gamma conversion layer (322, 324) for converting detected gamma quanta into gamma detection signals.
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公开(公告)号：US10079608B2
公开(公告)日：2018-09-18
申请号：US14343941
申请日：2012-09-10
Applicant: Priyanka Kumar , Robert Staszewski , Edoardo Charbon
Inventor： Priyanka Kumar , Robert Staszewski , Edoardo Charbon
CPC classification number: H03M1/002 , G01B11/24 , G01T1/1647 , G04F10/005 , H04N5/378 , H04N13/20 , H04N2213/001
Abstract: Time-to-digital converter system including: an event detector configured for detecting an event and generating an event detection signal upon detection of the event; and a time-to-digital converter coupled or connectable to the event detector and including a fine resolution part configured for counting fine time intervals, organized such that the fine resolution part is activated in response to the event detection signal and deactivated in response to a reference clock. 3D imager including an array of pixels, with in each pixel such a time-to-digital converter system, and further including a reference clock generator.
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4.发明申请公开(公告)号：US20180214085A1
公开(公告)日：2018-08-02
申请号：US15747943
申请日：2016-06-24
Applicant: JIANGSU SINOGRAM MEDICAL TECHNOLOGY CO., LTD
CPC classification number: A61B5/7203 , A61B6/037 , A61B6/4258 , G01T1/1647 , G01T1/202 , G01T1/2985 , G01T1/40 , H04L65/4076
Abstract: An online real-time correction method and system for a positron emission tomography (PET) detector. The method includes: acquiring a drifted channel number of a peak position of a full-energy peak in a drifted energy spectrum after a gain value of a PET detector system has changed and a ratio of a currently accumulated energy of each signal channel to a current total accumulated energy of all signal channels; substituting the above parameters, an initial channel number of the peak position of the full-energy peak in an initial energy spectrum and a ratio of an initially accumulated energy of each signal channel to a total initially accumulated energy of all of the signal channels in the PET detector system into a gain adjustment ratio calculation formula to calculate a gain adjustment ratio; and adjusting, according to the gain adjustment ratio, a gain value of the PET detector system.
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公开(公告)号：US20180175956A1
公开(公告)日：2018-06-21
申请号：US15575634
申请日：2016-05-26
Applicant: RAYCAN TECHNOLOGY CO., LTD. (SUZHOU)
Inventor： Qingguo XIE , Yuexuan HUA , Huihua WEN , Daoming XI
CPC classification number: H04J3/0617 , A61B6/037 , G01T1/161 , G01T1/1642 , G01T1/1647 , G01T1/1648
Abstract: A channel multiplexing method for reading out a detector signal is provided, including steps: grouping L detectors to form a first source signal and a second source signal; respectively introducing L detector signals into a first signal transmission line including two readout channels A and B and a second signal transmission line including two readout channels C and D, and providing a first signal delay unit and a second signal delay unit on the first signal transmission line and the second signal transmission line; and symbolizing source detectors for forming signals according to pulses of the four readout channels A, B, C and D, and obtaining final pulse information.
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Patent Agency Ranking
公开(公告)号：US09995830B2
公开(公告)日：2018-06-12
申请号：US15128114
申请日：2016-03-15
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Volkmar Schulz
IPC: G01T1/164
CPC classification number: G01T1/1647
Abstract: A method for scintillation event localization in a radiation particle detector includes providing a plurality of scintillator element locations (2′) configured to emit a burst of photons responsive to a radiation particle being absorbed at the scintillator element location (2′). A burst of photons emitted by the scintillator element location (2′) is detected with a photosensor (5). The photosensor (5) includes an array of single photon avalanche diodes configured to break down responsive to impingement of a photon. Breakdown data (30) is acquired indicative of which of the single photon avalanche diodes are in breakdown. Predetermined photosensor sensitivity data (20, 40) assigns single photon avalanche diodes to groups. Each group is assigned to exactly one scintillator element location (2′). Finally the number of single photon avalanche diodes in breakdown is determined for each group individually to identify the scintillator element location (2′) that emitted the burst of photons.
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公开(公告)号：US09910162B2
公开(公告)日：2018-03-06
申请号：US15315151
申请日：2015-06-12
Applicant: Siemens Medical Solutions USA, Inc.
Inventor： Manojeet Bhattacharya
IPC: H01L27/146 , G01T1/164 , G12B13/00 , G01T1/166 , G01T1/24 , G01T1/29 , G01T7/00 , G01T1/208 , G01T1/40 , A61B6/00
CPC classification number: G01T1/1647 , A61B6/582 , G01T1/1642 , G01T1/166 , G01T1/208 , G01T1/247 , G01T1/249 , G01T1/2964 , G01T1/40 , G01T7/005 , G12B13/00
Abstract: For calibration (24) for quantitative SPECT, a multiple energy emission source (11) is used for calibration. The planar sensitivities and/or uniformities are determined at different emission energies based on detections from the multiple energy emission source. For estimating (32) the activity concentration, sensitivities and/or uniformities based on measures (26) at different emission energies increase accuracy. The multiple energy emission source (11) may alternatively or additionally be used to calibrate (40) a dose calibrator (15).
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公开(公告)号：US20170371043A1
公开(公告)日：2017-12-28
申请号：US15128114
申请日：2016-03-15
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Volkmar SCHULZ
IPC: G01T1/164
CPC classification number: G01T1/1647
Abstract: A method for scintillation event localization in a radiation particle detector comprises the steps of providing a plurality of scintillator element locations (2′) configured to emit a burst of photons responsive to a radiation particle being absorbed at the scintillator element location (2′) and detecting a burst of photons emitted by a scintillator element location (2′) with a photosensor (5), wherein the photosensor (5) comprises an array of single photon avalanche diodes configured to break down responsive to impingement of a photon. Breakdown data (30) is acquired indicative of which of the single photon avalanche diodes are in breakdown and predetermined photosensor sensitivity data (20, 40) is provided, which assign single photon avalanche diodes to groups, wherein each group is assigned to exactly one scintillator element location (2′). Finally the number of single photon avalanche diodes in breakdown is determined for each group individually to identify the scintillator element location (2′) that emitted the burst of photons.
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公开(公告)号：US09835730B2
公开(公告)日：2017-12-05
申请号：US14387279
申请日：2012-03-30
Applicant: Guy M. Besson
Inventor： Guy M. Besson
CPC classification number: G01T1/17 , A61B6/03 , A61B6/032 , A61B6/037 , A61B6/463 , A61B6/465 , A61B6/469 , G01T1/1647 , G06T3/40 , G06T11/003 , G06T11/005
Abstract: Among other things, one or more techniques and/or systems are described for presenting images derived from a photon counting imaging modality. Initially, a first image is derived by binning native projection data in a first manner to create first binned data and generating the first image using the first binned data. A region-of-interest within the object may be identified from the first image, and, based upon the identified region-of-interest, the native projection data may be rebinned in a second, different, manner to create second binned data. Because the second manner of binning the native projection data is different than the first manner, an image resulting from the second binned data may be different than the first image. Moreover, a user interface may be provided for assisting a user in selecting a region-of-interest and/or for specifying desired properties of the second image.
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公开(公告)号：US09798020B2
公开(公告)日：2017-10-24
申请号：US14830067
申请日：2015-08-19
Applicant: General Electric Company
Inventor： Chang Lyong Kim , William Todd Peterson , Vi-Hoa Tran , Sean Michael Bacon
CPC classification number: G01T7/005 , G01T1/1647 , G01T1/2018 , G01T1/248 , G01T1/249
Abstract: Methods and systems are provided for performing cathode calibration in a detector assembly. In one embodiment, a method comprises adjusting a cathode bias of a detector based on a total number of events occurring in the detector during a time period while maintaining an anode bias at a desired value, the events corresponding to photon energy detected by the detector. In this way, an automated cathode calibration procedure may be applied to calibrate the detector assembly.
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