High frequency transducer arrays for medical imaging

Timothy Ritter, K. Kirk Shung, Richard Tutwiler, Thomas R. Shrout

Research output: Contribution to journalConference article

1 Scopus citations

Abstract

This paper discusses the design, fabrication, testing, and simulated imaging performance of high frequency linear arrays. Both a 2-2 PZT composite array with a fine spatial scale and a PbTiO3 array have been investigated at 30 MHz. The composite array demonstrated a seven-fold increase in sensitivity over the PbTiO3 array, as well as increased bandwidth and reduced crosstalk. The electrical impedance magnitude of the composite array was 56 ohms at 30 MHz, and the measured insertion loss was -14 dB. Simulated results demonstrate excellent lateral and axial resolution when imaging a phantom using a synthetic aperture approach. A 35 MHz device is also under development. An interconnect method using a flex circuit and sputtered metal films is used to electrically connect to each element. A curve fitting technique was then used to characterize elements of the array. Electromechanical coupling coefficients from 0.55 to 0.62 and clamped relative permittivities (ε33S,0) from 1200 to 2000 were observed.

Original languageEnglish (US)
Pages (from-to)208-216
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3982
StatePublished - Jan 1 2000
EventMedical Imaging 2000: Ultrasonic Imaging and Signal Processing - San Diego, CA, USA
Duration: Feb 16 2000Feb 17 2000

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Ritter, T., Shung, K. K., Tutwiler, R., & Shrout, T. R. (2000). High frequency transducer arrays for medical imaging. Proceedings of SPIE - The International Society for Optical Engineering, 3982, 208-216.