A new multifrequency transducer for microemboli detection and classification

Peggy Palanchon, Ayache Bouakaz, Jan Klein, Nico de Jong

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

1 Citation (Scopus)

Abstract

The classification of circulating microemboli as gaseous or particulate matter is essential to establish the relevance of detected embolic signals. Transcranial Doppler (TCD) technology has not yet fully succeeded in characterizing the composition of microemboli unambiguously. Recently, the authors proposed a new approach to detect, characterize and size gaseous emboli. The method is based on the nonlinear properties of gaseous bubbles. The application of this approach requires a dedicated transducer with the ability to transmit the adequate frequencies and simultaneously receive the high frequency scattered nonlinear components. The paper presents a multifrequency emboli transducer composed of two independent transmitting elements and a separate receiving part. The transmitting part can cover a frequency band between 100 kHz and 600 kHz. The reception of the signal is performed by a 110 /spl mu/m PVDF layer sensitive over a frequency band ranging from 50 kHz to 2 MHz. Experimental results show that a specific range of gaseous embolus size was detected by each transmitting element. Using the 130 kHz outer element in transmission, microemboli between 35 /spl mu/m and 105 /spl mu/m can be discriminated through their second harmonic or subharmonic emissions while gaseous microemboli between 10 /spl mu/m and 40 /spl mu/m were accurately classified using the 360 kHz inner element. The in vitro results demonstrate that nonlinear properties of microemboli combined with the new transducer offer a real opportunity to characterize and size microemboli.
Original languageEnglish
Title of host publicationIEEE Ultrasonics Symposium, 2004
Place of PublicationPiscataway, NJ
PublisherIEEE
Number of pages3
ISBN (Print)0-7803-8412-1
DOIs
Publication statusPublished - 2004
EventIEEE Ultrasonics Symposium 2004 - Montreal, Canada
Duration: 23 Aug 200427 Aug 2004

Conference

ConferenceIEEE Ultrasonics Symposium 2004
CountryCanada
CityMontreal
Period23/08/0427/08/04

Fingerprint

transducers
particulates
bubbles
harmonics

Keywords

  • Biomedical transducers
  • Cardiology
  • Ultrasonic transducers
  • Acoustic scattering
  • Acoustic transducers
  • Nonlinear acoustics
  • In vitro
  • Radio frequency
  • RF signals
  • Echocardiography

Cite this

Palanchon, P., Bouakaz, A., Klein, J., & de Jong, N. (2004). A new multifrequency transducer for microemboli detection and classification. In IEEE Ultrasonics Symposium, 2004 Piscataway, NJ: IEEE. https://doi.org/10.1109/ULTSYM.2004.1417769
Palanchon, Peggy ; Bouakaz, Ayache ; Klein, Jan ; de Jong, Nico. / A new multifrequency transducer for microemboli detection and classification. IEEE Ultrasonics Symposium, 2004. Piscataway, NJ : IEEE, 2004.
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abstract = "The classification of circulating microemboli as gaseous or particulate matter is essential to establish the relevance of detected embolic signals. Transcranial Doppler (TCD) technology has not yet fully succeeded in characterizing the composition of microemboli unambiguously. Recently, the authors proposed a new approach to detect, characterize and size gaseous emboli. The method is based on the nonlinear properties of gaseous bubbles. The application of this approach requires a dedicated transducer with the ability to transmit the adequate frequencies and simultaneously receive the high frequency scattered nonlinear components. The paper presents a multifrequency emboli transducer composed of two independent transmitting elements and a separate receiving part. The transmitting part can cover a frequency band between 100 kHz and 600 kHz. The reception of the signal is performed by a 110 /spl mu/m PVDF layer sensitive over a frequency band ranging from 50 kHz to 2 MHz. Experimental results show that a specific range of gaseous embolus size was detected by each transmitting element. Using the 130 kHz outer element in transmission, microemboli between 35 /spl mu/m and 105 /spl mu/m can be discriminated through their second harmonic or subharmonic emissions while gaseous microemboli between 10 /spl mu/m and 40 /spl mu/m were accurately classified using the 360 kHz inner element. The in vitro results demonstrate that nonlinear properties of microemboli combined with the new transducer offer a real opportunity to characterize and size microemboli.",
keywords = "Biomedical transducers, Cardiology, Ultrasonic transducers, Acoustic scattering, Acoustic transducers, Nonlinear acoustics, In vitro, Radio frequency, RF signals, Echocardiography",
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Palanchon, P, Bouakaz, A, Klein, J & de Jong, N 2004, A new multifrequency transducer for microemboli detection and classification. in IEEE Ultrasonics Symposium, 2004. IEEE, Piscataway, NJ, IEEE Ultrasonics Symposium 2004, Montreal, Canada, 23/08/04. https://doi.org/10.1109/ULTSYM.2004.1417769

A new multifrequency transducer for microemboli detection and classification. / Palanchon, Peggy; Bouakaz, Ayache; Klein, Jan; de Jong, Nico.

IEEE Ultrasonics Symposium, 2004. Piscataway, NJ : IEEE, 2004.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

TY - GEN

T1 - A new multifrequency transducer for microemboli detection and classification

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AU - Klein, Jan

AU - de Jong, Nico

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N2 - The classification of circulating microemboli as gaseous or particulate matter is essential to establish the relevance of detected embolic signals. Transcranial Doppler (TCD) technology has not yet fully succeeded in characterizing the composition of microemboli unambiguously. Recently, the authors proposed a new approach to detect, characterize and size gaseous emboli. The method is based on the nonlinear properties of gaseous bubbles. The application of this approach requires a dedicated transducer with the ability to transmit the adequate frequencies and simultaneously receive the high frequency scattered nonlinear components. The paper presents a multifrequency emboli transducer composed of two independent transmitting elements and a separate receiving part. The transmitting part can cover a frequency band between 100 kHz and 600 kHz. The reception of the signal is performed by a 110 /spl mu/m PVDF layer sensitive over a frequency band ranging from 50 kHz to 2 MHz. Experimental results show that a specific range of gaseous embolus size was detected by each transmitting element. Using the 130 kHz outer element in transmission, microemboli between 35 /spl mu/m and 105 /spl mu/m can be discriminated through their second harmonic or subharmonic emissions while gaseous microemboli between 10 /spl mu/m and 40 /spl mu/m were accurately classified using the 360 kHz inner element. The in vitro results demonstrate that nonlinear properties of microemboli combined with the new transducer offer a real opportunity to characterize and size microemboli.

AB - The classification of circulating microemboli as gaseous or particulate matter is essential to establish the relevance of detected embolic signals. Transcranial Doppler (TCD) technology has not yet fully succeeded in characterizing the composition of microemboli unambiguously. Recently, the authors proposed a new approach to detect, characterize and size gaseous emboli. The method is based on the nonlinear properties of gaseous bubbles. The application of this approach requires a dedicated transducer with the ability to transmit the adequate frequencies and simultaneously receive the high frequency scattered nonlinear components. The paper presents a multifrequency emboli transducer composed of two independent transmitting elements and a separate receiving part. The transmitting part can cover a frequency band between 100 kHz and 600 kHz. The reception of the signal is performed by a 110 /spl mu/m PVDF layer sensitive over a frequency band ranging from 50 kHz to 2 MHz. Experimental results show that a specific range of gaseous embolus size was detected by each transmitting element. Using the 130 kHz outer element in transmission, microemboli between 35 /spl mu/m and 105 /spl mu/m can be discriminated through their second harmonic or subharmonic emissions while gaseous microemboli between 10 /spl mu/m and 40 /spl mu/m were accurately classified using the 360 kHz inner element. The in vitro results demonstrate that nonlinear properties of microemboli combined with the new transducer offer a real opportunity to characterize and size microemboli.

KW - Biomedical transducers

KW - Cardiology

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KW - RF signals

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Palanchon P, Bouakaz A, Klein J, de Jong N. A new multifrequency transducer for microemboli detection and classification. In IEEE Ultrasonics Symposium, 2004. Piscataway, NJ: IEEE. 2004 https://doi.org/10.1109/ULTSYM.2004.1417769