PMN-PT single crystal, high-frequency ultrasonic needle transducers for pulsed-wave Doppler application

Qifa Zhou, Xiaochen Xu, Emanuel J. Gottlieb, Lei Sun, Jonathan M. Cannata, Hossein Ameri, Mark S. Humayun, Pengdi Han, K. Kirk Shung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

138 Citations (Scopus)


High-frequency needle ultrasound transducers with an aperture size of 0.4 mm were fabricated using lead magnesium niobate-lead titanate (PMN-33%PT) as the active piezoelectric material. The active element was bonded to a conductive silver particle matching layer and a conductive epoxy backing through direct contact curing. An outer matching layer of parylene was formed by vapor deposition. The active element was housed within a polyimide tube and a 20-gauge needle housing. The magnitude and phase of the electrical impedance of the transducer were 47 Ω and -38°, respectively. The measured center frequency and -6 dB fractional bandwidth of the PMN-PT needle transducer were 44 MHz and 45%, respectively. The two-way insertion loss was approximately 15 dB. In vivo high-frequency, pulsed-wave Doppler patterns of blood now in the posterior portion and in vitro ultrasonic backscatter microscope (UBM) images of the rabbit eye were obtained with the 44-MHz needle transducer.
Original languageEnglish
Pages (from-to)668-673
Number of pages6
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Issue number3
Publication statusPublished - 1 Mar 2007
Externally publishedYes

ASJC Scopus subject areas

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering


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