Medical broad band electromagnetic holographic imaging
First Claim
1. A method for imaging an anomalous region located within a nontransparent medium of an organism, said method comprising the steps of:
- a. placing one or more electromagnetic transmitters in transmission contact with said medium;
b. placing one or more electromagnetic receivers at receiving positions with respect to said medium;
c. operating said transmitters to generate a broad band electromagnetic field, comprising a frequency domain and/or time domain electromagnetic field, whereby said generated electromagnetic field propagates through said medium to interact with said anomalous region, resulting in a scattered electromagnetic field;
d. measuring said scattered electromagnetic field with said receivers;
e. obtaining a background field {Eb, Hb} representative of a background medium equivalent to said medium without the presence of said anomalous region;
f. obtaining a backscattering anomalous field {Eas, Has} equivalent to that obtainable by illuminating said background medium with said scattered electromagnetic field transmitted from the receiving positions of said receivers; and
g. producing a broad band holographic image of said anomalous region by calculating cross power spectra of said background and said backscattering fields, or calculating cross correlation functions between said background and said backscattering fields.
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Accused Products
Abstract
A method of imaging an object, such as a diseased human heart or bone or malignant tumor, in a nontransparent medium, such as the human body, involves placing an array of transmitters and receivers in operational association with the medium. The transmitters generate a broad band harmonic (frequency domain) or pulse (time domain) primary electromagnetic field (EM) field, including the lower frequency portions of the EM spectrum, whose propagation is typically characterized by the diffusion phenomena, or by the combination of the diffusion and wave phenomena. The primary field propagates through the examined medium and interacts with the object to produce a scattered field, which is recorded by the receivers. The scattered EM field components measured by the receivers are applied as an artificial EM field to generate a backscattering EM field. Cross power spectra of the primary and backscattering fields (in the frequency domain) or cross correlation between these fields (in the time domain) produce a numerical reconstruction of an EM hologram. The desired properties of the medium, such as conductivity or dielectric permittivity, are then derived from this hologram.
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Citations
17 Claims
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1. A method for imaging an anomalous region located within a nontransparent medium of an organism, said method comprising the steps of:
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a. placing one or more electromagnetic transmitters in transmission contact with said medium;
b. placing one or more electromagnetic receivers at receiving positions with respect to said medium;
c. operating said transmitters to generate a broad band electromagnetic field, comprising a frequency domain and/or time domain electromagnetic field, whereby said generated electromagnetic field propagates through said medium to interact with said anomalous region, resulting in a scattered electromagnetic field;
d. measuring said scattered electromagnetic field with said receivers;
e. obtaining a background field {Eb, Hb} representative of a background medium equivalent to said medium without the presence of said anomalous region;
f. obtaining a backscattering anomalous field {Eas, Has} equivalent to that obtainable by illuminating said background medium with said scattered electromagnetic field transmitted from the receiving positions of said receivers; and
g. producing a broad band holographic image of said anomalous region by calculating cross power spectra of said background and said backscattering fields, or calculating cross correlation functions between said background and said backscattering fields. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system of imaging a body part of a human or animal, comprising:
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an imaging ring including one or more transmitter coils and one or more receiver coils, said imaging ring configured to accommodate said body part inside said imaging ring, said transmitter coils configured to generate a broad band electromagnetic field comprising a frequency domain and/or time domain electromagnetic field, whereby said generated electromagnetic field propagates through said human or animal and interacts with said body part to result in a scattered electromagnetic field, said receiver coils configured to record said scattered electromagnetic field; and
a computer configured to simulate a background field representing a hypothetical electromagnetic field of said human or animal without said body part, to compute a backscattering field representing another hypothetical electromagnetic field obtainable by transmitting said scattered electromagnetic field from said receivers, and to produce a volume image of electric conductivity and/or dielectric permittivity of said body part. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification