title: Focused intravascular ultrasonic probe using dimpled transducer elements.
abstract: High-frequency focused intravascular ultrasonic probes were fabricated in this study using dimple technique based on PMN-PT single crystal and lead-free KNN-KBT-Mn ceramic. The center frequency, bandwidth, and insertion loss of the PMN-PT transducer were 34 MHz, 75%, and 22.9 dB, respectively. For the lead-free probe, the center frequency, bandwidth, and insertion loss were found to be 40 MHz, 72%, and 28.8 dB, respectively. The ultrasonic images of wire phantom and vessels with good resolution were obtained to evaluate the transducer performance. The -6 dB axial and lateral resolutions of the PMN-PT probe were determined to be 58 μm and 131 μm, respectively. For the lead-free probe, the axial and lateral resolutions were found to be 44 μm and 125 μm, respectively. These results suggest that the mechanical dimpling technique has good potential in preparing focused transducers for intravascular ultrasound applications.
authors.affiliation: The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China; Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Paul C. Lauterbur Research Center for Biomedical Imaging, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
authors.forename: W B
authors.initials: WB
authors.lastname: Qiu
authors.affiliation: Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China.
authors.forename: K H
authors.initials: KH
authors.lastname: Lam
authors.affiliation: Paul C. Lauterbur Research Center for Biomedical Imaging, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
authors.forename: B Q
authors.initials: BQ
authors.lastname: Liu
authors.affiliation: Department of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, China.
authors.forename: X P
authors.initials: XP
authors.lastname: Jiang
authors.affiliation: Paul C. Lauterbur Research Center for Biomedical Imaging, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
authors.forename: H R
authors.initials: HR
authors.lastname: Zheng
authors.affiliation: Information Materials and Devices Research Center, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, China.
authors.forename: H S
authors.initials: HS
authors.lastname: Luo
authors.affiliation: The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China; Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China.
authors.forename: H L W
authors.initials: HL
authors.lastname: Chan
authors.affiliation: The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China; Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China. Electronic address: jiyan.dai@polyu.edu.hk.
authors.forename: J Y
authors.initials: JY
authors.lastname: Dai
mesh_terms: D002516:Ceramics; D004867:Equipment Design; D014159:Transducers; D018084:Ultrasonography, Interventional / Q000295:instrumentation*
keywords: Dimple technique; Intravascular ultrasound; Lead-free ceramic; PMN–PT single crystal