WO2000045707A3 - Improved thermoacoustic computed tomography scanner - Google Patents

Improved thermoacoustic computed tomography scanner Download PDF

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Publication number
WO2000045707A3
WO2000045707A3 PCT/US2000/002672 US0002672W WO0045707A3 WO 2000045707 A3 WO2000045707 A3 WO 2000045707A3 US 0002672 W US0002672 W US 0002672W WO 0045707 A3 WO0045707 A3 WO 0045707A3
Authority
WO
WIPO (PCT)
Prior art keywords
tissue
image
measuring
transducers
computed tomography
Prior art date
Application number
PCT/US2000/002672
Other languages
French (fr)
Other versions
WO2000045707A2 (en
Inventor
Robert A Kruger
Original Assignee
Optosonics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Optosonics Inc filed Critical Optosonics Inc
Priority to CA002361076A priority Critical patent/CA2361076A1/en
Priority to JP2000596833A priority patent/JP2002536041A/en
Priority to BR0007738-0A priority patent/BR0007738A/en
Priority to AU28667/00A priority patent/AU2866700A/en
Priority to EP00907114A priority patent/EP1158905A2/en
Publication of WO2000045707A2 publication Critical patent/WO2000045707A2/en
Priority to NO20013598A priority patent/NO20013598L/en
Publication of WO2000045707A3 publication Critical patent/WO2000045707A3/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0093—Detecting, measuring or recording by applying one single type of energy and measuring its conversion into another type of energy
    • A61B5/0095—Detecting, measuring or recording by applying one single type of energy and measuring its conversion into another type of energy by applying light and detecting acoustic waves, i.e. photoacoustic measurements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
    • A61B8/0825—Detecting organic movements or changes, e.g. tumours, cysts, swellings for diagnosis of the breast, e.g. mammography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/42—Details of probe positioning or probe attachment to the patient
    • A61B8/4272—Details of probe positioning or probe attachment to the patient involving the acoustic interface between the transducer and the tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
    • A61B8/4416—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to combined acquisition of different diagnostic modalities, e.g. combination of ultrasound and X-ray acquisitions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
    • A61B5/7217—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise originating from a therapeutic or surgical apparatus, e.g. from a pacemaker
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02872—Pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S128/00—Surgery
    • Y10S128/915—Ultrasound mammography

Abstract

Methods and apparatus for measuring and characterizing the localized electromagnetic wave absorption properties of biologic tissues (29) in vivo, using incident electromagnetic waves to produce resultant acoustic waves. Multiple acoustic transducers (33) arranged on a rotatable imaging bowl (14) are acoustically coupled to the surface of the tissue for measuring acoustic waves produced in the tissue when the tissue is exposed to a pulse of electromagnetic radiation. The multiple transducer signals are then combined to produce an image of the absorptivity of the tissue, which image may be used for medical diagnostic purposes. Specific mathematical reconstruction procedures are described for producing images from transducer signals. Specific arrangements of transducers are illustrated, and noise reduction techniques are described.
PCT/US2000/002672 1999-02-02 2000-02-02 Improved thermoacoustic computed tomography scanner WO2000045707A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA002361076A CA2361076A1 (en) 1999-02-02 2000-02-02 Improved thermoacoustic computed tomography scanner
JP2000596833A JP2002536041A (en) 1999-02-02 2000-02-02 Improved thermoacoustic computed tomography scanner
BR0007738-0A BR0007738A (en) 1999-02-02 2000-02-02 Equipment and imaging methods for tissue structures
AU28667/00A AU2866700A (en) 1999-02-02 2000-02-02 Improved thermoacoustic computed tomography scanner
EP00907114A EP1158905A2 (en) 1999-02-02 2000-02-02 Improved thermoacoustic computed tomography scanner
NO20013598A NO20013598L (en) 1999-02-02 2001-07-20 Improved thermoacoustic computed tomography scanner

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/243,004 1999-02-02
US09/243,004 US6216025B1 (en) 1999-02-02 1999-02-02 Thermoacoustic computed tomography scanner

Publications (2)

Publication Number Publication Date
WO2000045707A2 WO2000045707A2 (en) 2000-08-10
WO2000045707A3 true WO2000045707A3 (en) 2001-10-04

Family

ID=22916967

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/002672 WO2000045707A2 (en) 1999-02-02 2000-02-02 Improved thermoacoustic computed tomography scanner

Country Status (8)

Country Link
US (1) US6216025B1 (en)
EP (1) EP1158905A2 (en)
JP (1) JP2002536041A (en)
AU (1) AU2866700A (en)
BR (1) BR0007738A (en)
CA (1) CA2361076A1 (en)
NO (1) NO20013598L (en)
WO (1) WO2000045707A2 (en)

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US6216025B1 (en) 2001-04-10
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