Systems and methods for high-speed radiography with high resolution imaging of large-area fields
View Patent ↗The present invention proposes a high speed radiographic system for use with megavolt linear-accelerator pulsed x-ray sources to produce video images of large-area fields. A linear accelerator is positioned above a field of view. X-ray photons are directed through an object of interest traveling and/or colliding within the field of view. A large area scintillator system, either truly continuous or in large continuous adjacent pieces, converts the x-ray photons that pass through the object into visible light, and an arrangement of cameras, focused at that plane, where each camera sees a sub-area of the entire scintillator, and these sub-areas overlap somewhat to cover the entire scintillator. The resulting images generated in each camera are synchronized to produce one contiguous, synchronized stream of images.
1. A system, comprising:
an x-ray source, configured to generate high-energy x-ray photons;
an x-ray detector comprising a converter and a scintillator, the x-ray detector being configured to receive the high-energy x-ray photons from the source, to convert the high-energy x-ray photons into a plurality of light photons;
a plurality of image acquisition devices arranged in a two-dimensional array with overlapping fields of view, each image acquisition device of the plurality of image acquisition devices being configured to generate a plurality of x-ray images of a moving object crossing between the x-ray source and the x-ray detector at a high rate of speed from the plurality of light photons produced by the x-ray detector;
a central control circuit configured to combine the plurality of x-ray images captured by the plurality of image acquisition devices into a set of combined x-ray images;
a timing device disposed in the central control circuit and communicatively coupled to the x-ray source and the plurality of image acquisition devices, the timing device being configured to synchronize a timing of the generation of the high-energy x-ray photons in the x-ray source with the generation of x-ray images by the plurality of image acquisition devices; and
a reflective surface positioned to reflect the plurality of light photons produced by the x-ray detector to a plurality of sensors included in the plurality of image acquisition devices.
2. The system according to claim 1 , wherein the x-ray source comprises a linear accelerator.
3. The system according to claim 1 , wherein the x-ray source comprises a pulse x-ray source configured to generate the high-energy x-ray photons at a pre-determined pulse rate.
4. The system according to claim 1 , wherein the system further comprises a metal converting film disposed over the scintillator and configured to increase an efficiency of the scintillator.
5. The system according to claim 1 , wherein the plurality of image acquisition devices comprises a plurality of high-speed video cameras.
6. The system according to claim 1 , further comprising a contained volume, wherein the moving object travels along a surface of the contained volume.
7. The system according to claim 6 , wherein the x-ray detector, the mirror, and the plurality of image acquisition devices are positioned within the contained volume.
8. The system according to claim 1 , wherein a plurality of redundancies in the generated images caused by the overlapping fields of view are reduced by the central control circuit during combination to generate a single contiguous large field image per time unit.
9. The system according to claim 1 , wherein the plurality of image acquisition devices comprises a plurality of memory devices, wherein the plurality of x-ray images generated by the plurality of image acquisition devices is stored in the plurality of memory devices.
10. The system according to claim 9 , wherein the central control circuit combines the plurality of x-ray images captured by the plurality of image acquisition devices by accessing the plurality of x-ray images stored in the plurality of memory devices and combining the plurality of x-ray images into the set of combined x-ray images.
11. The system according to claim 10 , wherein the central control circuit is remotely positioned with respect to the plurality of image acquisition devices.
12. The system according to claim 1 , wherein the plurality of x-ray images compose a video.
13. The system according to claim 1 , wherein the object comprises an automobile.
14. The system according to claim 13 , further comprising a means for facilitating a collision with the automobile.
15. The system according to claim 14 , wherein the plurality of image acquisition devices are configured to generate a plurality of x-ray images of a collision between the automobile and the means for facilitating a collision with the automobile.
16. A method comprising:
generating a plurality of high-energy x-ray photons in an x-ray source;
directing the plurality of high-energy x-ray photons as a field to an x-ray detector;
facilitating a collision between an automobile and an object within the field of high-energy x-ray photons;
receiving a portion of the plurality of high-energy x-ray photons from the x-ray source in the x-ray detector, the x-ray detector being positioned on an opposite side of the automobile from the x-ray source;
outputting, with a scintillator comprised in the x-ray detector, a plurality of light photons from the x-ray detector;
reflecting, with a reflective surface, the plurality of light photons from the x-ray detector to a plurality of sensors in a plurality of image acquisition devices; and
generating a plurality of x-ray images in the plurality of image acquisition devices from the plurality of light photons, the plurality of image acquisition devices being arranged in a two-dimensional array with overlapping fields of view,
wherein the generating the plurality of high-energy x-ray photons and the generating the plurality of x-ray images is synchronized by a timing device in a central control circuit communicatively coupled to the x-ray source and the plurality of image acquisition devices.
17. The method according to claim 16 , further comprising combining the plurality of x-ray images generated in the plurality of image acquisition devices into a set of combined x-ray images.
18. The method according to claim 17 , wherein generating the plurality of x-ray images in the plurality of image acquisition devices comprises storing the plurality of x-ray images in a plurality of memory devices corresponding to the plurality of image acquisition devices.
19. The method according to claim 18 , wherein the combining the plurality of x-ray images comprises:
retrieving the stored plurality of x-ray images from the plurality of memory devices; and
combining the plurality of x-ray images with the timing device system.
20. The method according to claim 19 , wherein the central control circuit is remotely positioned from the plurality of image acquisition devices.
21. A non-transitory computer readable medium containing program instructions embodied therein for causing a computer graphics system to generate x-ray images, the program instructions comprising:
instructions to generate a plurality of high-energy x-ray photons in an x-ray source;
instructions to direct the plurality of high-energy x-ray photons as a field to an x-ray detector;
instructions to facilitate a collision between an automobile and an object within the field of high-energy x-ray photons;
instructions to receive a portion of the plurality of high-energy x-ray photons from the x-ray source in the x-ray detector, the x-ray detector being positioned on an opposite side of the automobile from the x-ray source;
instructions to output, with a scintillator comprised in the x-ray detector, a plurality of light photons from the x-ray detector;
instructions to reflect, with a reflective surface, the plurality of light photons from the x-ray detector to a plurality of sensors comprised in a plurality of image acquisition devices; and
instructions to generate a plurality of x-ray images in the plurality of image acquisition devices from the plurality of light photons, the plurality of image acquisition devices being arranged in a two-dimensional array with overlapping fields of view,
wherein generation of the plurality of high-energy x-ray photons and generation of the plurality of x-ray images is synchronized by a timing device in a central control circuit communicatively coupled to the x-ray source and the plurality of image acquisition devices.
22. The non-transitory computer readable medium according to claim 21 , further comprising instructions to combine the plurality of x-ray images generated in the plurality of image acquisition devices into a set of combined x-ray images.
23. The non-transitory computer readable medium according to claim 22 , wherein the instructions to generate the plurality of x-ray images in the plurality of image acquisition devices comprises instructions to store the plurality of x-ray images in a plurality of memory devices corresponding to the plurality of image acquisition devices.
24. The non-transitory computer readable medium according to claim 23 , wherein the instructions to combined the plurality of x-ray images comprises:
instructions to retrieve the stored plurality of x-ray images from the plurality of memory devices; and
instructions to combine the plurality of x-ray images in the timing device.
25. The non-transitory computer readable medium according to claim 24 , wherein the central control circuit is remotely positioned from the plurality of image acquisition devices.
26. The non-transitory computer readable medium according to claim 24 , wherein the central control circuit comprises a computing device.