Snapshot backscatter radiography (SBR) systems including system having dynamic collimation
First Claim
1. A snapshot backscatter radiography (SBR) system having dynamic collimation, comprising:
- at least one penetrating radiation source;
at least one substantially transmissive radiation detector, wherein said substantially transmissive radiation detector is interposed between an object region to be interrogated and said radiation source, said substantially transmissive radiation detector receiving and detecting forward radiation from said radiation source before transmitting a portion thereof to interrogate said object region, wherein a portion of backscattered radiation from said object region is detected by said detector, andat least one changeable collimating grid having a plurality of spaced apart features coupled to structure for changing a position of said plurality of features, said changeable collimating grid being in a path of said forward radiation or a path of said backscattered radiation.
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Abstract
A snapshot backscatter radiography (SBR) system and related method includes at least one penetrating radiation source, and at least one substantially transmissive radiation detector. The substantially transmissive radiation detector is interposed between an object region to be interrogated and the radiation source. The substantially transmissive radiation detector receives and detects forward radiation from the radiation source before transmitting a portion thereof to interrogate the object region, wherein a portion of backscattered radiation provided by the object region is detected by the detector. A changeable collimating grid having a plurality of spaced apart radiation absorbing features is coupled to structure changing a position of the plurality of features and is disposed in at least one of the path of the forward radiation and the path of the backscattered radiation. An image of the object can be obtained by subtracting the forward radiation detected at the detector, or an estimate thereof, from a total of all radiation detected by the detector. Integrated circuit inspection, land mine detection, and luggage or cargo screening systems can all be SBR based.
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Citations
20 Claims
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1. A snapshot backscatter radiography (SBR) system having dynamic collimation, comprising:
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at least one penetrating radiation source; at least one substantially transmissive radiation detector, wherein said substantially transmissive radiation detector is interposed between an object region to be interrogated and said radiation source, said substantially transmissive radiation detector receiving and detecting forward radiation from said radiation source before transmitting a portion thereof to interrogate said object region, wherein a portion of backscattered radiation from said object region is detected by said detector, and at least one changeable collimating grid having a plurality of spaced apart features coupled to structure for changing a position of said plurality of features, said changeable collimating grid being in a path of said forward radiation or a path of said backscattered radiation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A snapshot backscatter radiography (SBR) method for imaging objects, comprising the steps of:
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directing penetrating forward radiation through a detector to an object region to be interrogated, said detector receiving and detecting forward radiation from said radiation source before transmitting a portion thereof to interrogate said object region, wherein said object region provides backscattered radiation toward said detector; varying an orientation of said penetrating radiation relative to said object region or a selectivity of said detector to said backscattered radiation while performing said imaging to provide a plurality of different snapshot measurements, and generating an image of said object region from said plurality of snapshot measurements. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A snapshot backscatter radiography (SBR) system, comprising:
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at least one penetrating radiation source, and at least one substantially transmissive radiation detector, wherein said substantially transmissive radiation detector is interposed between an object to be interrogated and said radiation source, said substantially transmissive radiation detector receiving and detecting forward radiation from said radiation source before transmitting a portion thereof to interrogate said object, a portion of said transmitted portion backscattered by said object as backscattered radiation, said backscattered radiation detected by said detector. - View Dependent Claims (18, 19, 20)
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Specification