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公开(公告)号：US20240361477A1
公开(公告)日：2024-10-31
申请号：US18683829
申请日：2021-11-16
IPC分类号： G01T1/24 , A61B6/42 , H01L27/146
CPC分类号： G01T1/243 , A61B6/4233 , A61B6/4258 , A61B6/4266 , H01L27/14659 , H01L27/14696
摘要： For larger FOV in a gamma camera, multiple solid-state detectors are tiled. The edge pixels of the pixelated detectors are smaller than interior pixels so that the pitch of the pixels or anodes is constant across the tiled detectors. The constant pitch occurs where pairs of edge pixels combined from different detectors contribute the pitch or area of an interior pixel. As a result of this optimized edge pixel pairing and corresponding regular pitch across the tiles, the spectral and other performance is less degraded.
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公开(公告)号：US20240358339A1
公开(公告)日：2024-10-31
申请号：US18765321
申请日：2024-07-07
发明人： Yangyi LIU
CPC分类号： A61B6/5282 , A61B6/032 , A61B6/5229 , A61B6/4241
摘要： The present disclosure is related to methods and systems for imaging. The method may include obtaining current information of a target subject. The current information may include information relating to current radiation attenuation of the target object. The method may also include obtaining reference information of the target subject. The reference information may include information relating to historical radiation attenuation of the target object. The method may also include determining at least one current parameter of the target subject based on the current information and the reference information. The method may also include obtaining a target image of the target subject based on the at least one current parameter.
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公开(公告)号：US20240350110A1
公开(公告)日：2024-10-24
申请号：US18643283
申请日：2024-04-23
发明人： Patrick KUEHNLEIN , Helmut KROPFELD
CPC分类号： A61B6/585 , A61B6/4241 , A61B6/54
摘要： A method for ascertaining an operating parameter of a medical imaging device, the method comprising: providing a measurement dataset by operation of the medical imaging device; and ascertaining the operating parameter as a function of the measurement dataset by a processing algorithm. The processing algorithm includes a sub-algorithm, which provides an intermediate result, wherein the intermediate result depends on a first partial dataset of the measurement dataset, wherein the operating parameter is ascertained as a function of the intermediate result and a second partial dataset of the measurement dataset, and wherein calculation of the intermediate result by the sub-algorithm and the capture of the second partial dataset by the medical imaging device at least partially overlap time-wise.
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公开(公告)号：US20240350108A1
公开(公告)日：2024-10-24
申请号：US18759422
申请日：2024-06-28
发明人： Sanguk KIM
CPC分类号： A61B6/542 , A61B6/4241
摘要： Provided are an X-ray detector automatically correcting an automatic exposure control (AEC) sensing area, based on an image obtained using an AEC sensor array, and a method of operating the X-ray detector. The X-ray detector may detect, using an AEC sensor array, X-rays that have passed through an object, obtain a one-dimensional (1D) image by quantifying a dose of the detected X-rays into a signal value, identify a symmetric point from the 1D image, based on a signal value for each pixel of the 1D image, and adjust respective locations of a plurality of AEC sensing areas so that the plurality of AEC sensing areas are symmetrical to each other with respect to the identified symmetric point.
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公开(公告)号：US12125605B2
公开(公告)日：2024-10-22
申请号：US18349075
申请日：2023-07-07
发明人： Lane Marsden , Peter J. Rothschild
CPC分类号： G21K1/043 , A61B6/4078 , A61B6/4266 , G06T7/0012 , G06T2207/10128
摘要： An x-ray imaging apparatus includes a holdable housing; an x-ray source mounted within the housing and configured to output a fan beam of x-rays; and a hoop chopper wheel rotatably mounted within the housing and comprising an x-ray attenuating material configured to block x-rays of the fan beam. The hoop chopper wheel defines a set of beam apertures of which each aperture is configured to pass therethrough a corresponding angular portion of x-rays from the fan beam, so that rotation of the hoop chopper wheel causes scanning of the corresponding angular portion of x-rays. The x-ray source may be a transmission-type x-ray tube configured to output the fan beam centered in an x-ray extraction direction forming an angle greater than 0 degrees with respect to a longitudinal axis of the x-ray tube.
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公开(公告)号：US12121390B2
公开(公告)日：2024-10-22
申请号：US17815568
申请日：2022-07-27
申请人： Konica Minolta, Inc.
发明人： Kohei Isogai , Hidetake Tezuka , Nobuyuki Miyake , Kentaro Hara , Masahiro Kuwata , Koji Kashima
摘要： A control system includes a radiation emission apparatus and a radiographic imaging apparatus that generates image data by receiving radiation. A first apparatus of the radiation emission apparatus and the radiographic imaging apparatus includes a first timer that performs time measurement to periodically generate first time measurement information. A second apparatus of the radiation emission apparatus and the radiographic imaging apparatus includes a second timer that performs time measurement to periodically generate second time measurement information. The first apparatus includes an interface that transmits the first time measurement information to the second timer. At least one apparatus includes a hardware processor which adjusts the operation of the first or second timer based on adjustment conditions in a state where the second timer does not acquire the first time measurement information.
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公开(公告)号：US12121380B2
公开(公告)日：2024-10-22
申请号：US17964642
申请日：2022-10-12
发明人： Shinichi Kojima , Fumito Watanabe , Isao Takahashi , Kazuma Yokoi , Taiga Goto , Fuyuhiko Teramoto , Ryosuke Tsuchida
CPC分类号： A61B6/4241 , A61B6/032 , A61B6/5205 , A61B6/5258
摘要： There is provided a PCCT apparatus capable of correcting a band artifact of one material decomposition image and a band artifact of another material decomposition image. The PCCT apparatus obtains projection data divided into plural energy bins by irradiating a subject with X-rays, and includes: a first correction unit that corrects a band artifact of a first material decomposition image among plural material decomposition images created on the basis of the projection data, and calculates a first correction amount that is a correction amount for the band artifact; an energy calculation unit that calculates an average energy of X-rays that transmit the subject; and a second correction unit that corrects the band artifact of a second material decomposition image using a second correction amount that is a correction amount calculated on the basis of the first correction amount and the average energy.
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公开(公告)号：US20240335176A1
公开(公告)日：2024-10-10
申请号：US18749379
申请日：2024-06-20
发明人： Asaf Shtern , Michael Luybansky
IPC分类号： A61B6/42
CPC分类号： A61B6/4258
摘要： A radiation detector head assembly includes a detector column including a detector having a first surface and a second surface opposite the first surface. The detector column includes a first collimator disposed over the first surface of the detector and a second collimator disposed over the second surface of the detector. The detector column includes a first radiation shield disposed over the first collimator, wherein the first radiation shield includes a first recess for receiving the first collimator and a first opening over a third surface of the first collimator, the third surface being opposite the first surface of the detector. The detector column includes a second radiation shield disposed over the second collimator, wherein the second radiation shield includes a second recess for receiving the second collimator and a second opening over a fourth surface of the second collimator, the fourth surface being opposite the second surface.
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9.发明授权公开(公告)号：US12111433B2
公开(公告)日：2024-10-08
申请号：US18306773
申请日：2023-04-25
发明人： Xiaohui Zhan , Xiaofeng Niu , Ilmar Hein
CPC分类号： G01T7/005 , A61B6/032 , A61B6/4035 , A61B6/4241 , A61B6/4447 , A61B6/583 , A61B6/585 , G06T7/10 , G06T11/005 , G06T2207/10081 , G06T2207/30004 , G06T2211/448
摘要： A method and a system for providing calibration for a polychromatic photon counting detector forward counting model. Measurements with multiple materials and known path lengths are used to calibrate the photon counting detector counting response of the forward model. The flux independent weighted bin response function is estimated using the expectation maximization method, and then used to estimate the pileup correction terms at plural tube voltage settings for each detector pixel. The beam hardening corrections are then applied to the measured projection data sinogram, and the corrected sinogram is reconstructed to the counting image at the selected single energy.
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公开(公告)号：US12111429B2
公开(公告)日：2024-10-08
申请号：US17669316
申请日：2022-02-10
申请人： TRIXELL
发明人： Bruno Bosset , Thierry Ducourant , Bruno Commere
IPC分类号： G01T1/20 , A61B6/42 , H01L27/146 , H04N5/32
CPC分类号： G01T1/20184 , A61B6/4233 , G01T1/20181 , H01L27/14663 , H04N5/32
摘要： A digital detector includes a conversion block intended to convert incident radiation into electric charge; an electronic card that converts the electric charge into a digital image, the conversion block comprising N conversion stages superposed on one another, N being an integer between 2 and M, each of the N conversion stages comprising: a monolithic substrate; a first converter assembly in the form of a polygonal matrix array, M being the number of sides of the polygonal matrix array, M preferably being equal to 4, and configured so as to generate the electric charge on the basis of the incident radiation; an addressing and driving module for addressing and driving the matrix array, the addressing and driving module being arranged on the monolithic substrate along one side of the polygonal matrix array; each of the N conversion stages being oriented by at least 1/M of a turn with respect to the other N−1 conversion stages of the conversion block, and with an orientation distinct from the other N−1 conversion stages of the conversion block.
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