X-ray diffraction-based scanning system
AssigneeVarian Medical Systems Technologies, Inc.
InventorMichael C. Green
Life of this patent
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Abstract
An x-ray diffraction-based scanning method and system are described. The method includes screening for a particular substance in a container at a transportation center using a flat panel detector having a photoconductor x-ray conversion layer to detect x-rays diffracted by a particular substance in the container. The diffracted x-rays may be characterized in different ways, for examples, by wavelength dispersive diffraction and energy dispersive diffraction.
Claims61
An x-ray scanning system, comprising:
- a conveyor;
- an x-ray source configured to generate x-rays toward the conveyor;
- and
- a flat panel detector to receive diffracted x-rays from a container moving on the conveyor through the x-rays;
- a first collimator coupled to the flat panel detector;
- and
- a second collimator disposed between the conveyor and the first collimator, wherein the first and second collimators have collimation planes orthogonal to each other.
An x-ray scanning system, comprising:
- a conveyor;
- an x-ray source configured to generate x-rays toward the conveyor;
- and
- a flat panel detector to receive diffracted x-rays from a container moving on the conveyor through the x-rays,
- wherein the flat panel detector is movable to select a particular diffraction angle of photons emitted from inside a bag for receipt by the flat panel detector.
A method of container screening, comprising:
- providing a flat panel detector having a photoconductor x-ray conversion layer;
- and
- screening for a particular substance in a container at a transportation center using the flat panel detector to receive x-rays diffracted from the substance from an x-ray sheet beam incident upon the substance.
An x-ray scanning system, comprising:
- a two dimensional amorphous flat panel detector array;
- means for detecting a particular substance in a container at a transportation center using the two dimensional amorphous flat panel detector array to receive x-rays diffracted from the substance;
- and
- means for cooling the flat panel detector down to between below room temperature and approximately minus 70 degrees C.
An x-ray scanning system, comprising:
- a conveyor;
- an x-ray source configured to generate x-rays toward the conveyor, wherein the x-ray source generates an x-ray sheet beam;
- and
- a detector to receive diffracted x-rays from a container moving on the conveyor through the x-rays.
Dependencies are inferred from the claim text.