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公开(公告)号：US20240233975A9
公开(公告)日：2024-07-11
申请号：US18475703
申请日：2023-09-27
发明人： Peter J. Rothschild
IPC分类号： G21K1/04
摘要： An x-ray chopper wheel assembly includes a disk chopper wheel and a source-side scatter plate that has a solid cross-sectional area that absorbs x-ray radiation and is substantially smaller than a solid cross-sectional area of the disk chopper wheel. The assembly also includes a support structure that secures the source-side scatter plate substantially parallel to the disk chopper wheel, with a source-side gap between the scatter plate and the disk chopper wheel being a distance that substantially prevents x-ray leakage. An additional, output-side scatter plate may also be provided to reduce x-ray leakage further. Embodiments enable safe operation while significantly reducing weight, which is advantageous for a variety of disk-chopper-wheel-based x-ray scanning systems, especially hand-held x-ray scanners.
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公开(公告)号：US20240136084A1
公开(公告)日：2024-04-25
申请号：US18475703
申请日：2023-09-26
发明人： Peter J. Rothschild
IPC分类号： G21K1/04
摘要： An x-ray chopper wheel assembly includes a disk chopper wheel and a source-side scatter plate that has a solid cross-sectional area that absorbs x-ray radiation and is substantially smaller than a solid cross-sectional area of the disk chopper wheel. The assembly also includes a support structure that secures the source-side scatter plate substantially parallel to the disk chopper wheel, with a source-side gap between the scatter plate and the disk chopper wheel being a distance that substantially prevents x-ray leakage. An additional, output-side scatter plate may also be provided to reduce x-ray leakage further. Embodiments enable safe operation while significantly reducing weight, which is advantageous for a variety of disk-chopper-wheel-based x-ray scanning systems, especially hand-held x-ray scanners.
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公开(公告)号：US20240013947A1
公开(公告)日：2024-01-11
申请号：US18349075
申请日：2023-07-07
发明人： Lane Marsden , Peter J. Rothschild
CPC分类号： G21K1/043 , G06T7/0012 , A61B6/4078 , A61B6/4266 , 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：US20230290533A1
公开(公告)日：2023-09-14
申请号：US18245330
申请日：2021-09-16
发明人： Peter J. Rothschild
CPC分类号： G21K1/043 , G01V5/0025 , G21K1/10
摘要： An x-ray scanning assembly includes a disk chopper wheel configured to be irradiated by an x-ray beam and to block x-ray radiation of the x-ray beam, the wheel having a rim and a center. The disk chopper wheel defines therein two or more radial slits extending radially toward a rim and a center of the wheel, the slits configured to pass x-ray radiation of the x-ray beam therethrough and having at least two respective, distinct widths. An x-ray beam collimation system includes an x-ray source configured to output x-ray radiation; a collimator configured to receive the x-ray radiation form a collimated x-ray fan beam to be received at a chopper wheel. The collimated x-ray fan beam has a cross-sectional length and a cross-sectional width, smaller than the length, measured at the chopper wheel. The collimator includes a width adjustor configured to adjust width of the fan beam.
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公开(公告)号：US20190043633A2
公开(公告)日：2019-02-07
申请号：US15946425
申请日：2018-04-05
申请人： Heuresis Corporation
发明人： Peter J. Rothschild
摘要： An x-ray chopper wheel assembly includes a disk chopper wheel and a source-side scatter plate that has a solid cross-sectional area that absorbs x-ray radiation and is substantially smaller than a solid cross-sectional area of the disk chopper wheel. The assembly also includes a support structure that secures the source-side scatter plate substantially parallel to the disk chopper wheel, with a source-side gap between the scatter plate and the disk chopper wheel being a distance that substantially prevents x-ray leakage. An additional, output-side scatter plate may also be provided to reduce x-ray leakage further. Embodiments enable safe operation while significantly reducing weight, which is advantageous for a variety of disk-chopper-wheel-based x-ray scanning systems, especially hand-held x-ray scanners.
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公开(公告)号：US10056164B2
公开(公告)日：2018-08-21
申请号：US14646102
申请日：2013-11-18
发明人： Oren Ofer , Oren Zarchin
摘要： An imaging system (300) includes a radiation source (308) that emits radiation that traverses in a direction of an examination region (306) during a scan and a detector array (316) located opposite the radiation source, across the examination region, which detects radiation traversing the examination region during the scan and produces a signal indicative thereof. A beamshaper (318), located between the radiation source and the examination region, defines a flux intensity profile of the radiation beam traversing the examination region. The beamshaper includes a plurality of x-ray attenuating elements(326), which attenuate x-rays incident thereon, interleaved with a plurality of material free regions, which pass x-ray unattenuated. A transmittance of the x-rays is greater nearer a center region of the beamshaper relative to ends regions of the beamshaper. A beamshaper mover (328) translates the beamshaper during at least one acquisition interval of the scan.
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公开(公告)号：US20180233244A1
公开(公告)日：2018-08-16
申请号：US15751022
申请日：2016-08-24
摘要： A collimator taking the form of a prolate spheroid (40) comprising radiation attenuating material and featuring a twisted slit comprising radiation transmissive material. The twisted slit featuring first (43) and second (44) apertures arranged such that for each entrance point in one of the apertures there is a direct pathway through the major axis ‘B’ of the prolate spheroid (40), at a pre-determined angle, to a point in the other aperture, such that a compound aperture is formed. For each compound aperture the length of the direct pathway through the prolate spheroid (40) is constant. Rotation of the collimator about the major axis ‘B’, relative to a stationary point at the first aperture (43), steers in angle the compound aperture through the collimator from said stationary point. Such an arrangement allows radiation from a source positioned at said point to be collimated into a beam, the resultant beam being scanned in angle, and the resultant collimation effect being constant across the angular range of the scan.
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公开(公告)号：US09989483B2
公开(公告)日：2018-06-05
申请号：US14827653
申请日：2015-08-17
申请人： THE BOEING COMPANY
发明人： Gary E. Georgeson , Morteza Safai
IPC分类号： G01N23/20 , G01N23/203 , G21K1/02 , G21K1/04
CPC分类号： G01N23/203 , G01N23/20008 , G01N23/20025 , G01N2223/053 , G01N2223/1016 , G01N2223/301 , G01N2223/40 , G21K1/043
摘要： An imaging system for generating three dimensional image data using X-ray backscattering from one side of a structure is provided. The imaging system includes at least one X-ray source, at least one rotating collimator coupled to the at least one X-ray source, an X-ray detector, and a controller coupled to the at least one X-ray source, the at least one rotating collimator and the X-ray detector. The controller is configured to emit X-rays from the at least one X-ray source through the at least one rotating collimator towards the one side of the structure. Additionally, the controller is configured to detect backscattered X-rays from the one side of the structure, using the X-ray detector, at a plurality of depths within the structure. Additionally, the controller is configured to generate three dimensional image data of the structure based on the detected backscattered X-rays.
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公开(公告)号：US09820709B2
公开(公告)日：2017-11-21
申请号：US14647689
申请日：2013-11-07
发明人： Haim Zvi Melman , Allon Guez
CPC分类号： A61B6/469 , A61B6/02 , A61B6/06 , A61B6/4225 , A61B6/461 , A61B6/467 , A61B6/5205 , A61B6/542 , A61B6/545 , A61B6/583 , G21K1/04 , G21K1/043
摘要： A multiple frame x-ray imaging system is disclosed with capability of differential x-ray exposure of different input areas of an image intensifier or other x-ray detector. Collimators are provided to control the amount of radiation in various regions of the image and image processing is provided to provide the display of images of different qualities.
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公开(公告)号：US09655583B2
公开(公告)日：2017-05-23
申请号：US15334345
申请日：2016-10-26
发明人： Roland Proksa
CPC分类号： A61B6/54 , A61B6/4028 , A61B6/4035 , A61B6/42 , A61B6/4476 , G01T1/24 , G21K1/043 , H01J35/10 , H01J2235/086
摘要： The present invention relates to a radiographic imaging apparatus and a corresponding radiographic imaging method. The proposed apparatus comprises an X-ray source and a photon counting X-ray detector. The X-ray source comprises a rotary X-ray anode having a number of radial slits and a target layer provided on a surface of said rotary X-ray anode in between said radial slits for emitting X-ray radiation when hit by said electron beam. The said photon counting X-ray detector comprises a persistent current sensing and correction unit for sensing a persistent output current in a blanking interval during which no X-ray radiation is emitted by said X-ray source and for using the sensed persistent output current to correct a detector signal in a subsequent measurement interval during which X-ray radiation is emitted by said X-ray source.
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