CA2460794A1 - System and method for sample detection based on low-frequency spectral components - Google Patents

System and method for sample detection based on low-frequency spectral components Download PDF

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Publication number
CA2460794A1
CA2460794A1 CA002460794A CA2460794A CA2460794A1 CA 2460794 A1 CA2460794 A1 CA 2460794A1 CA 002460794 A CA002460794 A CA 002460794A CA 2460794 A CA2460794 A CA 2460794A CA 2460794 A1 CA2460794 A1 CA 2460794A1
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CA
Canada
Prior art keywords
frequency
signal
low
sample
spectral components
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CA002460794A
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French (fr)
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CA2460794C (en
Inventor
Bennett M. Butters
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Nativis Inc
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Individual
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Publication of CA2460794A1 publication Critical patent/CA2460794A1/en
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Publication of CA2460794C publication Critical patent/CA2460794C/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N37/00—Details not covered by any other group of this subclass
    • G01N37/005—Measurement methods not based on established scientific theories
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
    • H01Q7/08—Ferrite rod or like elongated core

Abstract

Method and apparatus for detecting a selected material in a sample are disclosed. In the method, the sample (842) is placed adjacent a detector coil (846), for generating an electromagnetic time-domain signal composed of sample source radiation. The signal is first conditioned to convert the signal to an amplified conditioned signal from which frequency components above a selected frequency have been removed, then filtered to selectively pass low-frequency spectral components that are (i) in a frequency range between dc and 50KHz, and (ii) characteristic of the selected material. The filtered signal is cross-correlated with a data set of low-frequency spectral components that are (i) in a frequency range between dc and 50KHz, and (ii) characteristic of a selected material, to produce a frequency-domain spectrum in the frequency range within DC to 50KHz. This spectrum is then used to determine whether the frequency-domain spectrum contains one or more low-frequency signal components that are characteristic of the selected material, and diagnostic of the presence or absence of such material in the sample.
CA002460794A 2002-04-19 2003-04-18 System and method for sample detection based on low-frequency spectral components Expired - Lifetime CA2460794C (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US37494102P 2002-04-19 2002-04-19
US37404302P 2002-04-19 2002-04-19
US60/374,941 2002-04-19
US60/374,043 2002-04-19
US43336102P 2002-12-12 2002-12-12
US60/433,361 2002-12-12
PCT/US2003/011834 WO2003102566A2 (en) 2002-04-19 2003-04-18 System and method for sample detection based on low-frequency spectral components

Publications (2)

Publication Number Publication Date
CA2460794A1 true CA2460794A1 (en) 2003-12-11
CA2460794C CA2460794C (en) 2005-02-08

Family

ID=29716109

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002460794A Expired - Lifetime CA2460794C (en) 2002-04-19 2003-04-18 System and method for sample detection based on low-frequency spectral components

Country Status (8)

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US (2) US6952652B2 (en)
EP (1) EP1511995A4 (en)
JP (1) JP2005523460A (en)
CN (1) CN1564940A (en)
AU (1) AU2003230950B2 (en)
BR (1) BR0305669A (en)
CA (1) CA2460794C (en)
WO (1) WO2003102566A2 (en)

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US9417257B2 (en) 2004-07-27 2016-08-16 Nativis, Inc. System and method for collecting, storing, processing, transmitting and presenting very low amplitude signals
US11103721B2 (en) 2013-03-15 2021-08-31 Natives, Inc. Controller and flexible coils for administering therapy, such as for cancer therapy

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9417257B2 (en) 2004-07-27 2016-08-16 Nativis, Inc. System and method for collecting, storing, processing, transmitting and presenting very low amplitude signals
US11103721B2 (en) 2013-03-15 2021-08-31 Natives, Inc. Controller and flexible coils for administering therapy, such as for cancer therapy

Also Published As

Publication number Publication date
CN1564940A (en) 2005-01-12
EP1511995A2 (en) 2005-03-09
BR0305669A (en) 2004-10-19
EP1511995A4 (en) 2005-10-19
US20040174154A1 (en) 2004-09-09
AU2003230950A1 (en) 2003-12-19
US20050176391A1 (en) 2005-08-11
US6952652B2 (en) 2005-10-04
WO2003102566A3 (en) 2004-03-25
CA2460794C (en) 2005-02-08
AU2003230950B2 (en) 2006-11-09
WO2003102566A2 (en) 2003-12-11
US7412340B2 (en) 2008-08-12
JP2005523460A (en) 2005-08-04

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