초록 ▼

An apparatus and method for rapid real time imaging with wavefield energy by inverse scattering using a C.P.U programmed to process data derived from wavefield energy that has been transmitted and scattered by an object so as to reconstruct a wavefield image of the object. Electronic signals are pro

An apparatus and method for rapid real time imaging with wavefield energy by inverse scattering using a C.P.U programmed to process data derived from wavefield energy that has been transmitted and scattered by an object so as to reconstruct a wavefield image of the object. Electronic signals are propagated and are transduced into wavefield energy waves which in turn are propagated toward the object. Detector means detect the wavefield energy waves scattered by the object. The detected wavefield energy waves are then electronically processed and input into a high-speed digital computer which may comprise a C.P.U. and/or a C.P.U in combination with an array or parallel 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 object 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. The media in which the object is embedded may be fluid or solid, homogeneous, or layered (such as stratigraphic layering, or ocean velocity layers, or layering of composites in nondestructive imaging applications), or may consist of porous material (either sedimentary deposits or composites in nondestructive testing).

대표청구항 ▼

A method of producing an image of an object from wavefield energy that has been transmitted into and scattered by the object, said image comprising a high resolution map of the scattering potential at all points within the object, said image being stored in a memory of a central processing unit (CPU

A method of producing an image of an object from wavefield energy that has been transmitted into and scattered by the object, said image comprising a high resolution map of the scattering potential at all points within the object, said image being stored in a memory of a central processing unit (CPU), and said method comprising the steps of: (a) electronically transmitting an electric signal at one or more frequencies and transducing said electric signal at each said frequency into wavefield energy propagated toward said object from one or more of antennae transmitter positions; (b) electronically processing said electric signal to determine an incident field corresponding to said propagated wavefield energy, said incident field being stored in the memory of the CPU in the form of digitized electric signals; (c) detecting at one or more of antennae receiver positions said wavefield energy transmitted into and scattered by said object; (d) electronically processing said detected wavefield energy so as to transform said detected wavefield energy into one or more digitized electric signals stored in said memory of said CPU and corresponding to a scattered field detected at said one or more antennae receiver positions; (e) said CPU setting an initialized estimate of the scattering potential for said object at each said frequency and storing each said scattering potential estimate in said memory: and (f) said CPU computing an updated scattering potential from said incident field and said scattered field detected.