Methods, systems, and computer program products for binary multiplexing x-ray radiography
View Patent ↗Methods, systems, and computer program products for binary multiplexing x-ray radiography are disclosed. According to one aspect, the subject matter described herein can include irradiating an object with composite x-ray beams including signals based on a predetermined binary transform. Further, the subject matter described herein can include detecting x-ray intensities associated with the signals of the composite x-ray beams. An inverse binary transform can be applied to the detected x-ray intensities associated with the signals of the composite x-ray beams to recover the signals of the composite x-ray beams.
1. A method of binary multiplexing x-ray radiography, the method comprising:
irradiating an object from a plurality of different locations with N composite x-ray beams including signals from N different x-ray sources based on a predetermined binary transform in which each of the different x-ray sources is turned on at least (N+1)/2 times;
detecting x-ray intensities associated with the signals of the composite x-ray beams that have passed through the object; and
applying an inverse binary transform to the detected x-ray intensities associated with the signals of the composite x-ray beams to recover the signals from the different x-ray sources.
2. The method of claim 1 wherein irradiating an object comprises irradiating the object with the composite x-ray beams generated by a plurality of x-ray sources.
3. The method of claim 1 wherein the x-ray sources comprise multi beam field emission x-ray sources.
4. The method of claim 1 wherein irradiating an object comprises irradiating the object with a predetermined pattern of the composite x-ray beams.
5. The method of claim 1 wherein irradiating an object comprises irradiating the object with composite x-ray beams including signals based on a predetermined Hadamard binary transform.
6. The method of claim 1 wherein irradiating the object with composite x-ray beams comprises irradiating the object with a plurality of monochromatic x-ray beams.
7. The method of claim 1 irradiating the object with a plurality of x-ray beams having different ray energies.
8. The method of claim 1 wherein detecting x-ray intensities comprises detecting the x-ray intensities with an one dimensional array or two dimension array of x-ray detectors.
9. The method of claim 8 wherein the x-ray detector is configured to record the x-ray intensities associated with the signals of the composite x-ray beams at a fast frame rate.
10. A binary multiplexing x-ray radiography system comprising:
a plurality of x-ray sources configured to irradiate an object from a plurality of different locations with N composite x-ray beams including signals from N individual x-ray beams based on a predetermined binary transform in which each of the individual x-ray beams is turned on at least (N+1)/2 times;
an x-ray detector configured to detect x-ray intensities associated with the signals of the composite x-ray beams that have passed through the object; and
an inverse binary transform function processor configured to apply an inverse binary transform to the detected x-ray intensities associated with the signals of the composite x-ray beams to recover the signals from individual x-ray beams.
11. The system of claim 10 wherein the x-ray sources comprise a plurality of field emission x-ray sources.
12. The system of claim 10 wherein the x-ray sources are configured to irradiate the object with a predetermined pattern of the composite x-ray beams.
13. The system of claim 10 wherein the x-ray sources are configured to irradiate the object with composite x-ray beams including signals based on a predetermined Hadamard binary transform.
14. The system of claim 10 wherein the plurality of x-ray sources are configured to irradiate the object with a plurality of monochromatic x-ray beams.
15. The system of claim 10 wherein irradiating the object with a plurality of x-ray beams with different energies.
16. The system of claim 10 wherein the x-ray detector comprises an array of one dimensional or two dimensional detector elements.
17. The system of claim 10 wherein the x-ray detector is configured to record the x-ray intensities associated with the signals of the composite x-ray beams at a fast frame rate.
18. A computer program product comprising computer-executable instructions embodied in a non-transitory computer-readable medium for directing a computer to perform steps comprising:
irradiating an object from a plurality of different locations with N composite x-ray beams including N individual signals based on a predetermined binary transform in which each of the individual signals is turned on at least (N+1)/2 times;
detecting x-ray intensities associated with the signals of the composite x-ray beams that have passed through the object; and
applying an inverse binary transform to the detected x-ray intensities associated with the signals of the composite x-ray beams to recover the signals from individual x-ray beams.
19. A binary multiplexing computed tomography x-ray imaging system comprising:
a plurality of x-ray sources configured to irradiate an object with N composite x-ray beams including signals from N individual x-ray beams based on a predetermined binary transform in which each of the individual x-ray beams is turned on at least (N+1)/2 times;
an x-ray detector configured to detect x-ray intensities associated with the signals of the composite x-ray beams;
an object stage positioned between the plurality of x-ray sources and the x-ray detector;
an electronic controller and a first computer program that enable the system to collect a sequence of composite images of the object corresponding to the x-ray intensities;
a second computer program that applies an inverse binary transform to the composite images to obtain the projection images of the object from the individual x-ray beams; and
an image reconstruction program to generate computed tomography images of the object.
20. The device of claim 19 wherein the binary transform is a Hadamard binary transform.
21. The device of claim 19 comprising an anti-scattering device configured to minimize scattered x-ray signals collected by the x-ray detector.
22. The device of claim 19 comprising a third computer program configured to analyze each composite x-ray image and configured to remove scattered x-ray intensities from the multiple x-ray beams based on an algorithm.
23. The device of claim 19 wherein the multiple x-ray emitting pixels are one of enclosed in one vacuum enclosure, enclosed in several vacuum enclosures wherein each vacuum enclosure contains a plurality of x-ray pixels, and enclosed in several vacuum enclosures wherein each vacuum enclosure encloses a single x-ray pixel.
24. The device of claim 19 wherein the x-ray source is an electron field emission multi-pixel x-ray source.