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Title: Compensated individually addressable array technology for human breast imaging

Abstract

A method of forming broad bandwidth acoustic or microwave beams which encompass array design, array excitation, source signal preprocessing, and received signal postprocessing. This technique uses several different methods to achieve improvement over conventional array systems. These methods are: 1) individually addressable array elements; 2) digital-to-analog converters for the source signals; 3) inverse filtering from source precompensation; and 4) spectral extrapolation to expand the bandwidth of the received signals. The components of the system will be used as follows: 1) The individually addressable array allows scanning around and over an object, such as a human breast, without any moving parts. The elements of the array are broad bandwidth elements and efficient radiators, as well as detectors. 2) Digital-to-analog converters as the source signal generators allow virtually any radiated field to be created in the half-space in front of the array. 3) Preprocessing allows for corrections in the system, most notably in the response of the individual elements and in the ability to increase contrast and resolution of signal propagating through the medium under investigation. 4) Postprocessing allows the received broad bandwidth signals to be expanded in a process similar to analytic continuation. Used together, the system allows for compensation tomore » create beams of any desired shape, control the wave fields generated to correct for medium differences, and improve contract and resolution in and through the medium.« less

Inventors:
 [1]
  1. (San Francisco, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
874981
Patent Number(s):
6504288
Assignee:
The Regents of the University of California (Oakland, CA) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
compensated; individually; addressable; array; technology; human; breast; imaging; method; forming; broad; bandwidth; acoustic; microwave; beams; encompass; design; excitation; source; signal; preprocessing; received; postprocessing; technique; methods; achieve; improvement; conventional; systems; elements; digital-to-analog; converters; signals; inverse; filtering; precompensation; spectral; extrapolation; expand; components; follows; allows; scanning; moving; efficient; radiators; detectors; generators; allow; virtually; radiated; field; created; half-space; front; corrections; notably; response; individual; ability; increase; contrast; resolution; propagating; medium; investigation; expanded; process; similar; analytic; continuation; compensation; create; shape; control; wave; fields; generated; correct; differences; improve; contract; broad bandwidth; received signal; /310/

Citation Formats

Lewis, D. Kent. Compensated individually addressable array technology for human breast imaging. United States: N. p., 2003. Web.
Lewis, D. Kent. Compensated individually addressable array technology for human breast imaging. United States.
Lewis, D. Kent. Wed . "Compensated individually addressable array technology for human breast imaging". United States. https://www.osti.gov/servlets/purl/874981.
@article{osti_874981,
title = {Compensated individually addressable array technology for human breast imaging},
author = {Lewis, D. Kent},
abstractNote = {A method of forming broad bandwidth acoustic or microwave beams which encompass array design, array excitation, source signal preprocessing, and received signal postprocessing. This technique uses several different methods to achieve improvement over conventional array systems. These methods are: 1) individually addressable array elements; 2) digital-to-analog converters for the source signals; 3) inverse filtering from source precompensation; and 4) spectral extrapolation to expand the bandwidth of the received signals. The components of the system will be used as follows: 1) The individually addressable array allows scanning around and over an object, such as a human breast, without any moving parts. The elements of the array are broad bandwidth elements and efficient radiators, as well as detectors. 2) Digital-to-analog converters as the source signal generators allow virtually any radiated field to be created in the half-space in front of the array. 3) Preprocessing allows for corrections in the system, most notably in the response of the individual elements and in the ability to increase contrast and resolution of signal propagating through the medium under investigation. 4) Postprocessing allows the received broad bandwidth signals to be expanded in a process similar to analytic continuation. Used together, the system allows for compensation to create beams of any desired shape, control the wave fields generated to correct for medium differences, and improve contract and resolution in and through the medium.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {1}
}

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