PMN-PT Single Crystal Ultrasonic Transducer with Half-concave Geometric Design for IVUS Imaging

Chunlong Fei, Yaoheng Yang, Feifei Guo, Pengfei Lin, Qiang Chen, Qifa Zhou, Lei Sun

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)

Abstract

IEEE As the key component of intravascular ultrasound (IVUS) imaging systems, traditional commercial side-looking IVUS transducers are flat and unfocused, which limits their lateral resolution. We propose a PMN-PT single crystal IVUS transducer with a half-concave geometry. This unique configuration makes it possible to conduct geometric focusing at a desired depth. To compare performances, the proposed and the traditional flat transducer with similar dimensions were fabricated. We determined that the half-concave transducer has a slightly higher center frequency (35 MHz), significantly broader −6 dB bandwidth (54%) but a higher insertion loss (−22.4 dB) compared to the flat transducer (32 MHz, 28%, and −19.3 dB, respectively). A significant enhancement of the lateral resolution was also confirmed. The experimental results are in agreement with the finite element simulation results. This preliminary investigation suggests that the half-concave geometry design is a promising approach in the development of focused IVUS transducers with broad bandwidth and high lateral resolution.
Original languageEnglish
Pages (from-to)2087
Number of pages2093
JournalIEEE Transactions on Biomedical Engineering
DOIs
Publication statusPublished - Sep 2018

Keywords

  • Acoustics
  • Apertures
  • Bandwidth
  • Crystals
  • Finite element analysis
  • focused IVUS transducer
  • half-concave geometric design
  • Imaging
  • mechanical dimpling technique
  • PMN-PT single crystal
  • Transducers
  • ultrasonic imaging

ASJC Scopus subject areas

  • Biomedical Engineering

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