A 30-MHz piezo-composite ultrasound array for medical imaging applications

Timothy A. Ritter, Thomas R. Shrout, Rick Tutwiler, K. Kirk Shung

Research output: Contribution to journalArticlepeer-review

227 Scopus citations


Ultrasound imaging at frequencies above 20 MHz is capable of achieving improved resolution in clinical applications requiring limited penetration depth. High frequency arrays that allow real-time imaging are desired for these applications but are not yet currently available. In this work, a method for fabricating fine-scale 2-2 composites suitable for 30-MHz linear array transducers was successfully demonstrated. High thickness coupling, low mechanical loss, and moderate electrical loss were achieved. This piezo-composite was incorporated into a 30-MHz array that included acoustic matching, an elevation focusing lens, electrical matching, and an air-filled kerf between elements. Bandwidths near 60%, 15-dB insertion loss, and crosstalk less than -30 dB were measured. Images of both a phantom and an ex vivo human eye were acquired using a synthetic aperture reconstruction method, resulting in measured lateral and axial resolutions of approximately 100 μm.

Original languageEnglish (US)
Pages (from-to)217-230
Number of pages14
JournalIEEE transactions on ultrasonics, ferroelectrics, and frequency control
Issue number2
StatePublished - Feb 2002

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering


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