System and method for XRD-based threat detection
AssigneeMorpho Detection, Inc.
InventorGeoffrey Harding
Life of this patent
Estimating the term…
Abstract
System and method for XRD-based threat detection. An object is scanned with a first threat detection system. One or more alarm objects are identified. Data about the one or more alarm objects is passed from the first threat detection system to a second threat detection system and is used to move and/or to rotate the object in a predetermined ray path that decreases attenuation of scattered x-ray radiation. Also disclosed is a secondary collimator for XRD-based false alarm resolution in computed tomography {“CT”) threat detection systems. The secondary collimator comprises one or more slit apertures configured to provide a multi-angle capability that extends a range of momenta for which XRD intensities are measured for a predetermined range of photon intensities.
Claims11
A secondary collimator, comprising:
- a body formed of a high density material;
- and
- a continuous spiral slit aperture formed in the body, wherein the continuous spiral slit aperture is oriented with a spirally increasing azimuth angle to enable multiple scatter beams to simultaneously pass through the continuous spiral slit aperture at different scatter angles for extending a range of momenta for which x-ray diffraction (XRD) intensities are measured for a predetermined range of photon intensities.
A threat detection system comprising:
- an x-ray source configured to irradiate an object;
- and
- a secondary collimator positioned apart from the x-ray source, the secondary collimator comprising:
- a body formed of a high density material;
- and
- a continuous spiral slit aperture formed in the body, wherein the continuous spiral slit aperture is oriented with a spirally increasing azimuth angle to enable multiple scatter beams to simultaneously pass through the continuous spiral slit aperture at different scatter angles for extending a range of momenta for which x-ray diffraction (XRD) intensities are measured for a predetermined range of photon intensities.
A method comprising:
- irradiating an object with an x-ray beam using an x-ray source;
- focusing scatter beams of the x-ray beam using a secondary collimator, wherein the secondary collimator includes a continuous spiral slit aperture that is oriented with a spirally increasing azimuth angle to enable multiple scatter beams to simultaneously pass through the continuous spiral slit aperture at different scatter angles for extending a range of momenta for which x-ray diffraction (XRD) intensities are measured for a predetermined range of photon intensities;
- and
- detecting photons in the scatter beams using at least one scatter detector.
Dependencies are inferred from the claim text.