Apparatus and method for acoustic imaging using inverse scattering techniques
Patent 4662222 Issued on May 5, 1987. Estimated Expiration Date: December 21, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
An apparatus and method for reconstructing an acoustic image of an object using a central processing unit programmed to process data derived from acoustic energy that has been transmitted at multiple frequencies and scattered by the object. Electronic signals are propagated at multiple frequencies and transduced into acoustic energy waves which are propagated toward an object. Transducer receivers detect the acoustic energy waves after they have been scattered by the object and the detected acoustic energy waves are then electronically processed and input into a high-speed digital computer which may comprise a central processing unit and/or a central processing unit in combination with an array processor. Data is also prepared and input to the computer representing the incident field and the computer then reconstructs a high-quality image of the scanned object so as to produce an image having high spacial resolution and including actual internal viscous and elastic properties of the object through the use of new inverse scattering techniques used in the data processing steps.
Other References
De Figueiredo, Rui J.P., "Approximation-Theoretic Methods for Nonlinear Deconvolution and Inversion", Information Sciences, vol. 31, No. 3, pp. 209-213 (1983)
Johnson, S. A. et al., "Acoustic Inverse Scattering Solutions by Moment Methods and Backpropagation", Conference on Inverse Scattering: Theory and Application, SIAM, Philadelphia (1983)
Johnson, S. A. et al., "Inverse Scattering Solutions by a Sinc Basis, Multiple Source, Moment Method--Part I: Theory", Ultrasonic Imaging, vol. 5, pp. 361-375
Johnson, S. A. et al., "Inverse Scattering Solutions by a Sinc Basis, Multiple Source, Moment Method--Part II: Numerical Evaluations", Ultrasonic Imaging, vol. 5, pp. 376-392
Johnson, Steven A. et al., "Ultrasound Tomography by Galerkin or Moment Methods", Lecture Notes in Medical Informatics, vol. 23, pp. 254-275 (1984)
Johnson, S. A. et al., "Fast Iterative Algorithms for Inverse Scattering Solutions of the Helmholtz and Riccati Wave Equations", Acoustical Imaging, vol. 13, pp. 75-87, Ed. M. Kaven, R. K. Mueller, and J. F. Greenleaf, Plenum Press (1984)
Johnson, S. A. et al., "Inverse Scattering Solutions by a Sinc Basis, Multiple Source, Moment Method--Part III: Fast Algorithms", Ultrasonic Imaging, vol. 6, pp. 103-116, Academic Press (1984)
Tarantola, A., "Inversion of Seismic Reflection Data in the Acoustic Approximation", Geophysics, vol. 49, No. 8, pp. 1259-1266 (1984)
Berkhout, A. J. et al., "The Relationship Between Multi-Dimensional Linearized Inversion and Seismic Migration", Abstract of presentation made at 54th Annual Meeting and Exposition of the Society of Exploration Geophysicists held at Atlanta, Ga. on Dec. 2-6, 1984
Carrion, Philip M. et al., "A Method for Computation of Velocity Profiles by Inversion of Large-Offset Records, Geophysics, vol. 49, No. 8, pp. 1249-1258 (1984)
Cheng, Guan and Shimon Coen, "The Relationship between Born Inversion, Rytov Inversion, and Migration for Both CMP Stacked and Slant Stacked Data, Abstract of presentation made at 54th Annual Meeting & Exposition of the Society of Exploration Geophysicists, Atlanta, 12/2-6/84
Foster, Douglas J. et al., "Linear Inversion Applied to Real Seismic Data", Abstract of presentation made at the 54th Annual Meeting & Exposition of the Society of Exploration Geophysicists, Atlanta, 12/2-6/84
Gauthier, O. et al., "Nonlinear Inversion of Seismic Reflection Data", Abstract of presentation made at the 54th Annual Meeting & Exposition of the Society of Exploration Geophysicists held at Atlanta, Dec. 2-6, 1984
Goutsias et al., "A 2-D Stochastic Earth Model for Seismic Inversion", Abstract of presentation made at the 54th Annual Meeting and Exposition of the Society of Exploration Geophysicists held at Atlanta, Ga., Dec. 2-6, 1984
Greenleaf, James F., "Computer Tomography from Ultrasound Scattered by Biological Tissues, American Mathematical Society--Symposium of Inverse Problems, (1983)
Hanson, Douglas W., "Multiparameter Seismic Inversion of Noisy Data", Abstract of presentation made at the 54th Annual Meeting and Exposition of the Society of Exploration Geophysicists held at Atlanta, Ga., Dec. 2-6, 1984
Harkrider, David G., "Synthetics and Theoretical Seismology", Reviews of Geophysics and Space Physics, vol. 21, No. 6, pp. 1299-1308 (1983)
Kaman, E. J., "Detailed Inversion of Reservoir Data by Constrained Parameter Estimation and Resolution Analysis," Abstract of presentation made at 54th Annual Meeting and Exposition of the Society of Exploration Georphysicists at Atlanta, Ga., Dec. 2-6, 1984
Lailly, P., "Migration Methods: Practical but Efficient Solutions to the Seismic Inverse Problem," Inverse Problems of Acoustic and Elastic Waves, pp. 182-214
La Bras, L. et al., "Presentation of a Born Inversion for Multioffset Reflection Data: Tests on Synthetic Seismograms," Abstract of presentation made at 54th Annual Meeting and Exposition of the Society of Exploration Geophysicists at Atlanta, Ga., Dec. 2-6, 1984
Lines, Larry R. et al., "Inversion with a Grain of Salt," Abstract of presentation made at 54th Annual Meeting and Exposition of the Society of Exploration Geophysicists at Atlanta, Ga., Dec. 2-6, 1984
Macdonald, Calum et al., "Nonlinear Seismic Inversion", Abstract of presentation made at 54th Annual Meeting and Exposition of the Society of exploration Geophysicists at Atlanta, Ga., Dec. 2-6, 1984
McClary, W. Keith, "Fast Seismic Inversion", Geophysics, vol. 48, No. 10, pp. 1371-1372 (1983)
Morley, Lawrence C., "Invertibility of Elastic Layered Earth Parameters from Precritical P-Wave Reflection Amplitudes", Abstract of presentation at 54th Annual Meeting and Exposition of the Society of Exploration Georphysicists at Atlanta, Ga., Dec. 2-6, 1984
Nercessian, A., "Linearized Inversion of Multioffset Seismic Reflection Data," Abstract of presentation at 54th Annual Meeting and Exposition of the Society of Exploration Geophysicists at Atlanta, Ga., Dec. 2-6, 1984
Sigalov, Ya. B. et al., "On the Solution of the Two-Dimensional Inverse Dynamic Problem of Seismometry by the Finite-Difference Method, Part 1." Geophysical Journal, vol. 5, No. 4, pp. 508-521 (1984)
Tarantola, A. et al., "Generalized Nonlinear Inverse Problems Solved Using the Lease Squares Criterion," Review of Geophysics and Space Physics, vol. 20, No. 2, pp. 219-232 (1982)
Tarantola, A. et al., "Inverse Problems: Quest of Information", J. Geophysics, vol. 50, No. 3, pp. 159-170 (1982)
Tarantola, A., "Linearized Inversion of Seismic Reflection Data," Geophysical Prospecting, vol. 30, pp. 98-1015 (1984)
VerWest, B. J. et al., "Prestack Inversion of Plane-Layered Viscoacoustic Earth Parameters," Abstract of presentation at 54th Annual Meeting and Exposition of the Society of the Exploration Geophysicist at Atlanta, Ga., Dec. 2-6, 1984
December 21, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
