High-frequency ultrasound transducer by using inversion layer technique for intravascular ultrasound imaging

J. H. Sung; J. S. Jeong

doi:10.1049/el.2015.3831

High-frequency ultrasound transducer by using inversion layer technique for intravascular ultrasound imaging

J. H. Sung, J. S. Jeong

Department of Biomedical Engineering

Dongguk University

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Inversion layer technique can increase the centre frequency (f₀) and the -6 dB bandwidth of the ultrasound transducer without reducing thickness of active material. However, it suffers from the reduced -6 dB bandwidth when the centre frequency is increased more than 1.5f₀. A modified inversion technique is proposed and applied it to high-frequency intravascular ultrasound (IVUS) transducer. The performance was computationally verified by using finite element method (FEM) simulation. The proposed IVUS transducer consists of two subelements with each aperture size of 0.6 × 0.6 mm, and each subelement has different types of inversion layer using PMN-PT and PZT-5H. The initial thickness of overall active material was designed for 40 MHz centre frequency and the FEM simulation showed that the centre frequency was increased by about 1.8f₀ maintaining the -6 dB fractional bandwidth compared with the conventional transducer.

Original language	English
Pages (from-to)	1003-1005
Number of pages	3
Journal	Electronics Letters
Volume	52
Issue number	12
DOIs	https://doi.org/10.1049/el.2015.3831
State	Published - 9 Jun 2016

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abstract = "Inversion layer technique can increase the centre frequency (f0) and the -6 dB bandwidth of the ultrasound transducer without reducing thickness of active material. However, it suffers from the reduced -6 dB bandwidth when the centre frequency is increased more than 1.5f0. A modified inversion technique is proposed and applied it to high-frequency intravascular ultrasound (IVUS) transducer. The performance was computationally verified by using finite element method (FEM) simulation. The proposed IVUS transducer consists of two subelements with each aperture size of 0.6 × 0.6 mm, and each subelement has different types of inversion layer using PMN-PT and PZT-5H. The initial thickness of overall active material was designed for 40 MHz centre frequency and the FEM simulation showed that the centre frequency was increased by about 1.8f0 maintaining the -6 dB fractional bandwidth compared with the conventional transducer.",

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High-frequency ultrasound transducer by using inversion layer technique for intravascular ultrasound imaging

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