Induced nuclear reactions: processes – systems – and elements – Nuclear transmutation – By neutron bombardment
Patent
1997-05-30
1999-07-27
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
Nuclear transmutation
By neutron bombardment
2503581, 25036306, 25039004, G21G 106, G01T 100
Patent
active
059303140
ABSTRACT:
This invention provides coded aperture imaging apparatus and methods for the detection and imaging of radiation which results from nuclear interrogation of a target object. The apparatus includes: 1) a radiation detector for detecting at least a portion of the radiation emitted by the object in response to nuclear excitation and for producing detection signals responsive to the radiation; 2) a coded aperture disposed between the detector and the object such that emitted radiation is detected by the detector after passage through the coded aperture; and 3) a data processor for characterizing the object based upon the detection signals from the detector and upon the configuration of the coded aperture. The method includes the steps of: 1) disposing a coded aperture in selected proximity to the object; 2) bombarding the object with a interrogation beam from a source of excitation energy; 3) detecting, with a detector, at least a portion of the radiation emitted in response to the interrogation beam, the detector producing detection signals responsive to the radiation, the detector being disposed so that the coded aperture is between the detector and the object and such that emitted radiation is detected by the detector after passage through the coded aperture; and 4) processing the detection signals to characterize the object based upon radiation detected by the detector after passage through the coded aperture, and based upon the configuration of the coded aperture.
REFERENCES:
patent: 3748470 (1973-07-01), Barrett
patent: 3997787 (1976-12-01), Fearon et al.
patent: 4017730 (1977-04-01), Barrett
patent: 4126783 (1978-11-01), Lanza
patent: 4209780 (1980-06-01), Fenimore et al.
patent: 4435838 (1984-03-01), Gourlay
patent: 4514632 (1985-04-01), Barrett
patent: 4864142 (1989-09-01), Gomberg
patent: 5006299 (1991-04-01), Gozani et al.
patent: 5078952 (1992-01-01), Gozani et al.
patent: 5098640 (1992-03-01), Gozani et al.
patent: 5114662 (1992-05-01), Gonzani et al.
patent: 5606165 (1997-02-01), Chiou et al.
Schaich, P.C. et al., "Automatic Image Analysis for Detecting and Quantifying Gamma-Ray Sources in Coded-Aperture Images", IEEE Transactions on Nuclear Science, vol. 43, No. 4 (Aug. 1996) pp. 2419-2426.
Fink, C.L., et al., "Evaluation of Neutron Techniques for Illicit Substance Detection", Nuclear Instruments & Methods in Physics Research, B 99 (1995) pp. 748-752.
Byard, K., Ramsden, D., "Coded Aperture Imaging Using Imperfect Detector Systems", Nucl. Instr. and Meth. in Phys. Res. A 342 (1994) pp. 600-608.
Bell, C.J. et al., "Analysis of Complex Targets Using Fast Neutrons", SPIE Vol. 2092 Substance Detection Systems (1993) pp. 514-524.
Rowe, R.K. et al., "A Stationary Hemispherical SPECT Imager for Three-Dimensional Brain Imaging", The Journal of Nuclear Medicine, vol. 34, No. 3 (Mar. 1993) pp. 474-480.
In 't Zand, J.J.M., "Coded Aperture Camera Imaging Concept", an excerpt from Ph.D. Thesis, University of Utrecht (1992) Web Page: http://lheawww.gsfc.nasa.gov/docs/cai/coded .sub.-- intr.html).
Ziock, K.P. et al., "A Gamma-Ray Imager for Arms Control", IEEE Transactions on Nuclear Science, vol. 39, No. 4 (1992) pp. 1046-1050.
Fenimore, E.E., "Time-Resolved and Energy-Resolved Coded Aperture Images with URA tagging", Applied Optics, vol. 26, No. 14 (Jul. 15, 1987) pp. 2760-2769.
Chou, Chien et al., "Quantum Noise of Fourier-Coded Aperture Imaging System", Jpn. J. Appl. Phys. vol. 33 (1994) pp. 2072-2078.
Roques, J.P., "Fast Decoding Algorithm for Uniformly Redundant Arrays", Applied Optics, vol. 26, No. 18 (Sep. 15, 1987) pp. 3862-3865.
Smith et al., "Image Reconstruction from Coded Data: I. Reconstruction Algorithms and Experimental Results", J. Opt. Soc. Am. A, vol. 2, No. 4 (Apr. 1985) pp. 491-500.
Paxman et al., "Image Reconstruction from Coded Data: II. Code Design", J. Opt. Soc. Am. A., vol. 2, No. 4 (Apr. 1985) pp. 501-509.
Skinner, G.K. "Imaging with Coded-Aperture Masks", Nuclear Instruments and Methods in Physics Research, vol. 221 (1984) pp. 33-40.
Simpson, R.G. and Barrett, H.H., "Coded-Aperture Imaging", Imaging for Medicine, vol. 1, Chapter 8, pp. 217-311 (Plenum Press, New York, 1980).
Fenimore, E.E. et al., "Uniformly Redundant Arrays: Digital Reconstruction Methods", Applied Optics, vol. 20, No. 10 (May 15, 1981) pp. 1858-1864.
Fenimore, E.E., "Coded Aperture Imaging: The Modulation Transfer Function for Uniformly Redundant Arrays", Applied Optics, vol. 19, No. 14 (Jul. 15, 1980) pp. 2465-2471.
Proctor, R.J. et al., "The Design of Optimum Coded Mask X-ray Telescopes", Mon. Not. R. astr. Soc. vol. 187 (1979) pp. 633-643.
Gunson et al., "Optimum Design of a Coded Mask X-Ray Telescope for Pocket Applications", Mon. Not. R. astr. Soc. vol. 177 (1976) pp. 485-497.
Fenimore, E.E., "Coded Aperture Imaging: Predicted Performance of Uniformly Redundant Arrays", Applied Optics, vol. 17, No. 22 (Nov. 15, 1978) pp. 3562-3570.
Fenimore, E.E., et al., "Coded Aperture Imaging with Uniformly Redundant Arrays", Applied Optics, vol. 17, No. 3 (Feb. 1, 1978) pp. 337-347.
Engellenner Thomas J.
Massachusetts Institute of Technology
Schulman C. Eric
Wasil Daniel D.
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