Fabrication of a PMN-PZT needle hydrophone for photoacoustic imaging

광음향 영상화를 위한 PMN-PZT 바늘형 수중청음기 제작

Fan, Xiaofeng;Cao, Yonggang;Ha, Kanglyeol;Kim, Moojoon;Kang, Hyun Wook;Oh, Junghwan

  • Received : 2016.02.05
  • Accepted : 2016.04.16
  • Published : 2016.05.31


For application to several MHz photoacoustic imaging systems, a needle hydrophone was designed and fabricated by using PMN-PZT piezoelectric single crystal, and its characteristics were evaluated through comparison with a commercial PVDF(Polybinylidene Fluoride) hydrophone of which receiving sensitivity is known. The simulation using the KLM model results show that the peak receiving impulse response for $50{\Omega}$ terminating impedance of the fabricated hydrophone is -261.6 dB re $1V/{\mu}Pa$ and the frequency response is relatively flat over 2 ~ 12 MHz with fluctuation less than 5 dB. The measurement results using tone burst signals also show that it has higher (ave. 10.9 dB) sensitivity than the commercial hydrophone in 2 ~ 8 MHz, and the receiving sensitivity of $-255.8{\pm}2.8$ dB re $1V/{\mu}Pa$ was measured for the fabricated hydrophone. In addition, it is known that the photoacoustic signals and the image of a hair obtained by a mechanical scanned photoacoustic imaging system with the fabricated hydrophone were bigger and better than those obtained with the commercial hydrophone.


Photoacoustic effect;Ultrasonic transducer;Piezoelectric crystal PMN-PZT;PVDF (Polyvinylidene Fluoride) piezoelectric film;Ultrasound image


  1. A. G. Bell, "On the production and reproduction of speech by light," Am. J. Sci. 3 rd Series 20, 305-324 (1880).
  2. C. B. Scruby, R. J. Dewhurst, D. A. Hutchins, and S. B. Palmer, "Quantitative studies of thermally generated elastic waves in laser-irradiated metals," J. Appl. Phys. 51, 6210-6216 (1980).
  3. D. O. Thompson and D. E. Chimenti, Review of progress in quantitative nondestructive evaluation (Plenum Press, New York and London, 1988), pp.1211-1218.
  4. S. J. Davies, C. Edwards, G. S. Taylor, and S. B. Palmer, "Laser-generated ultrasound: its properties, mechanisms and multifarious applications," J. Phys. D: Appl. Phys. 26, 329-348 (1993).
  5. H. W. Baac, J. G. Ok, A. Maxwell, K. T. Lee, Y. C. Chen, A. J. Hart, Z. Xu, E. Yoon, and L. J. Guo, "Carbon-nanotube optoacoustic lens for focused ultrasound generation and high-precision targeted therapy," Sci. Rep. 2:989, PMC3524551, 1-8 (2012).
  6. T. Bowen, "Radiation-induced thermoacoustic soft tissue imaging," IEEE Ultrasonics Symposium, 2, 817-822 (1981).
  7. X. Wang, Y. Pang, and G. Ku, "Three-dimensional laser-induced photoacoustic tomography of mouse brain with the skin and skull intact," Optics Lett. 28, 1739-1741 (2003).
  8. M. Xu and L. V. Wang, "Photoacoustic imaging in biomedicine," Review of Scientific Instruments, 77, 041101, 1-22 (2006).
  9. L. Xi, X. Li, and H. Jiang, "Variable-thickness multilayered polyvinylidene fluoride transducer with improved sensitivity and bandwidth for photoacoustic imaging," Appl. Phys. Lett. 101, 173702, 1-2 (2012).
  10. G. Gu and L. V. Wang, "Deeply penetrating photoacoustic tomography in biological tissues enhanced with an optical contrast agent," Optics Lett. 12, 507-509 (2005).
  11. J. Gamelin, A. Aguirre, A. Maurudis, F. Huang, D. Castillo, L. V. Wang, and Q. Zhu, "Curved array photoacoustic tomographic system for small animal imaging," J. Biomed. Opt. 13, 024007, 1-10 (2008).
  12. X Wang, J. B. Fowlkes, J. M. Cannata, C. Hu, and P. L. Carson, "Photoacoustic imaging with a commercial ultrasound system and a custom probe," Ultrasound Med. Biol. 37, 484-492 (2011).
  13. C. Li and L. V. Wang, "Photoacoustic tomography of the mouse cerebral cortex with a high-numerical-aperture-based virtual point detector," J. Biomed. Opt. 12, 024047, 1-3 (2009).
  14. S. A. Ermilov, T. Khamapirad, A. Conjusteau, M. H. Leonard, R. Lacewell, K. Mehta, T. Miller, and A. A. Oraevsky, "Laser optoacoustic imaging system for detection of breast cancer," J. Biomed. Opt. 14, 024007 (2009).
  15. C. S. DeSilets, J. D. Fraser, and G. S. Kino, "The design of efficient brodeband piezoelectric transducers," IEEE Trans. Sonics Ultrason. 25, 115-125 (1978).
  16. R. Krimholtz, D. A. Leedom, and G. L. Matthei, "New equivalent circuit for elementary piezoelectric transducers," Electronics Lett. 38, 338-339 (1970).

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  1. A thickness-mode piezoelectric micromachined ultrasound transducer annular array using a PMN–PZT single crystal vol.28, pp.7, 2018,


Grant : BK21플러스

Supported by : 부경대학교