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Method and apparatus for physiologic facsimile imaging of biologic targets without multipath contamination using remote microwave interrogation

  • US 4,271,389 A
  • Filed: 06/04/1979
  • Issued: 06/02/1981
  • Est. Priority Date: 05/22/1979
  • Status: Expired due to Term
First Claim
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1. A microwave imaging method of producing a physiologic facsimile image of a biological target on an image display device in which multipath contamination is minimized, comprising the steps of:

  • (a) for each one of a plurality of sample locations which are spaced so as to define a two-dimensional array, producing a time delay spectrum wherein the frequency of each spectral ordinate represents the instantaneous differential propagation delay between a first microwave signal which has been propagated through the target and a second microwave signal, initially corresponding to said first microwave signal, which has been propagated through means having a predetermined propagation delay, and measuring the amplitude of the spectral ordinate corresponding to the direct ray path of propagation through the target, so as to obtain a set of data;

    (b) processing said set of data to obtain a corresponding set of control signals for the display device; and

    (c) producing a two-dimensional image array on the display device using said set of control signals, and thereby obtaining the facsimile image.

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