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US 12,360,065 B2Granted
Backscatter imaging system
AssigneeVarex Imaging Corporation
InventorsDaniel Shedlock, David T Nisius
Life of this patent
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Abstract
An x-ray system, comprising: a backscatter detector, comprising: an x-ray conversion material; a plurality of sensors configured to generate electrical signals in combination with the x-ray conversion material in response to incident x-rays; and a collimator disposed on the x-ray conversion material and including a plurality of partitions extending away from the x-ray conversion material and the sensors and forming a plurality of openings, each opening corresponding to one of the sensors.
Claims20
An x-ray system, comprising:
- a backscatter detector, comprising:
- an x-ray conversion material;
- a plurality of sensors configured to generate electrical signals in combination with the x-ray conversion material in response to incident x-rays;
- and
- a collimator disposed on the x-ray conversion material and including a plurality of partitions extending away from the x-ray conversion material and the sensors and forming a plurality of openings, each opening corresponding to one of the sensors;
- wherein:
- each of the openings is associated with a set of one or more sensors of the sensors that is different from sets of sensors associated with the other openings;
- and
- a length (L) and a pitch (P) of the partitions are related to a target resolution (R) and an offset (H) from an object by an equation:
- R
- =
- PH
- L
- -
- 1
- 2
- .
14 more elements
An x-ray system, comprising:
- an x-ray source for generating a megavolt (MV) x-ray beam;
- a backscatter detector for detecting backscatter from the MV x-ray beam;
- and
- means for filtering photons from the MV x-ray beam having energies above 1 megaelectronvolts (MeV) before detection in the backscatter detector, the means for filtering photons comprising:
- a collimator including a plurality of partitions forming a plurality of openings, a length (L) and a pitch (P) of the partitions being related to a target resolution (R) and an offset (H) from an object by an equation:
- R
- =
- PH
- L
- -
- 1
- 2
- .
10 more elements
Dependencies are inferred from the claim text.