Apparatus for coded aperture X-ray scatter imaging and method therefor
First Claim
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1. A system for providing an image of a region of an object, the region including a plurality of object elements, and the region defining a longitudinal axis, the system comprising:
- a source of radiation operable for interrogating the object with a first radiation signal having energy within an energy passband that ranges from approximately 30 keV to approximately 69.5 keV;
a coded aperture operable for modulating a second radiation signal received from the object, the second radiation signal being based on the first radiation signal;
a detector comprising a two-dimensional arrangement of pixels, the detector operable for detecting a modulated image based on the modulated second signal; and
a processor operable for computing an estimate of the composition of the region based on the modulated image and a longitudinal forward model of the system.
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Abstract
A system and method for producing images of the structure and composition of an object based on measurements of the low-angle x-ray diffraction properties of the object. The imaging system includes a coded aperture that encodes spatial and spectral features onto radiation scattered from image points within the object. The radiation is detected at a two-dimensional array of detectors, whose output is deconvolved and processed to estimate a three-dimensional image having molecular specificity.
32 Citations
29 Claims
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1. A system for providing an image of a region of an object, the region including a plurality of object elements, and the region defining a longitudinal axis, the system comprising:
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a source of radiation operable for interrogating the object with a first radiation signal having energy within an energy passband that ranges from approximately 30 keV to approximately 69.5 keV; a coded aperture operable for modulating a second radiation signal received from the object, the second radiation signal being based on the first radiation signal; a detector comprising a two-dimensional arrangement of pixels, the detector operable for detecting a modulated image based on the modulated second signal; and a processor operable for computing an estimate of the composition of the region based on the modulated image and a longitudinal forward model of the system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for estimating the composition of a region of an object, the region including a plurality of object elements, and the region defining a longitudinal axis, the method comprising:
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interrogating the region with an input signal comprising x-ray radiation having an energy within an energy passband that ranges from approximately 30 keV to approximately 69.5 keV; providing a first radiation signal by encoding radiance information on a second radiation signal from the plurality of object elements, wherein the second radiation signal is based on the input signal; receiving a modulated image at a detector comprising a plurality of irradiance pixels, the modulated image being based on the first radiation signal; providing an output signal from the detector, the output signal being based on the modulated image; and computing an estimate of (1) the position along the longitudinal axis and (2) the scatter properties of each of the plurality of object elements based on the output signal and a longitudinal forward model of the system. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification