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Intracardiac ultrasound scanner using a micromachine (MEMS) actuator.

Publication ,  Journal Article
Zara, JM; Bobbio, SM; Goodwin-Johansson, S; Smith, SW
Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control
January 2000

Catheter-based intracardiac ultrasound offers the potential for improved guidance of interventional cardiac procedures. The objective of this research is the development of catheter-based mechanical sector scanners incorporating high frequency ultrasound transducers operating at frequencies up to 20 MHz. The authors' current transducer assembly consists of a single 1.75 mm by 1.75 mm, 20 MHz, PZT element mounted on a 2 mm by 2 mm square, 75 mum thick polyimide table that pivots on 3-mum thick gold plated polyimide hinges. The hinges also serve as the electrical connections to the transducer. This table-mounted transducer is tilted using a miniature linear actuator to produce a sector scan. This linear actuator is an integrated force array (IFA), which is an example of a micromachine, i.e., a microelectromechanical system (MEMS). The IFA is a thin (2.2 mum) polyimide membrane, which consists of a network of hundreds of thousands of micron scale deformable capacitors made from pairs of metallized polyimide plates. IFAs contract with an applied voltage of 30-120 V and have been shown to produce strains as large as 20% and forces of up to 8 dynes. The prototype transducer and actuator assembly was fabricated and interfaced with a GagePCI analog to digital conversion board digitizing 12 bit samples at a rate of 100 MSamples/second housed in a personal computer to create a single channel ultrasound scanner. The deflection of the table transducer in a low viscosity insulating fluid (HFE 7100, 3M) is up to +/-10 degrees at scan rates of 10-60 Hz. Software has been developed to produce real-time sector scans on the PC monitor.

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Published In

IEEE transactions on ultrasonics, ferroelectrics, and frequency control

DOI

EISSN

1525-8955

ISSN

0885-3010

Publication Date

January 2000

Volume

47

Issue

4

Start / End Page

984 / 993

Related Subject Headings

  • Acoustics
  • 51 Physical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
 

Citation

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ICMJE
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Zara, J. M., Bobbio, S. M., Goodwin-Johansson, S., & Smith, S. W. (2000). Intracardiac ultrasound scanner using a micromachine (MEMS) actuator. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 47(4), 984–993. https://doi.org/10.1109/58.852082
Zara, J. M., S. M. Bobbio, S. Goodwin-Johansson, and S. W. Smith. “Intracardiac ultrasound scanner using a micromachine (MEMS) actuator.IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 47, no. 4 (January 2000): 984–93. https://doi.org/10.1109/58.852082.
Zara JM, Bobbio SM, Goodwin-Johansson S, Smith SW. Intracardiac ultrasound scanner using a micromachine (MEMS) actuator. IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 2000 Jan;47(4):984–93.
Zara, J. M., et al. “Intracardiac ultrasound scanner using a micromachine (MEMS) actuator.IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 47, no. 4, Jan. 2000, pp. 984–93. Epmc, doi:10.1109/58.852082.
Zara JM, Bobbio SM, Goodwin-Johansson S, Smith SW. Intracardiac ultrasound scanner using a micromachine (MEMS) actuator. IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 2000 Jan;47(4):984–993.

Published In

IEEE transactions on ultrasonics, ferroelectrics, and frequency control

DOI

EISSN

1525-8955

ISSN

0885-3010

Publication Date

January 2000

Volume

47

Issue

4

Start / End Page

984 / 993

Related Subject Headings

  • Acoustics
  • 51 Physical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences