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Sun Y, Tao J, Guo F, Wang F, Dong J, Jin L, Li S, Huang X. AZ31B magnesium alloy matching layer for Lens-focused piezoelectric transducer application. ULTRASONICS 2023; 127:106844. [PMID: 36095851 DOI: 10.1016/j.ultras.2022.106844] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 08/14/2022] [Accepted: 09/01/2022] [Indexed: 06/15/2023]
Abstract
Compared with planar transducers, focused transducers have higher ultrasound intensity and better lateral resolution in the focal zone. At present, the matching layer materials for focused transducers are mainly 0-3 composite materials, which have problems such as non-uniformity, difficulty to fabricate at high frequencies, and large sound attenuation. In this paper, finite element analysis is carried out to simulate lens-focused transducers with different matching layer structures and materials. It is found that the focused transducer with magnesium alloy matching layer has the best comprehensive performance. A lens-focused PZT-5H ultrasonic transducer was then fabricated with AZ31B magnesium alloy as the first matching layer. The measured results show that the center frequency of the transducer is 4.38 MHz, the -6-dB bandwidth is 68.35 % and the insertion loss is -13.88 dB. Benefiting from the high uniformity, high acoustic impedance and extremely low acoustic attenuation of magnesium alloy, the transducers in this research exhibit superior performances than other reported transducers with conventional matching layer. The current work suggests that AZ31B magnesium alloy is a promising matching layer material for ultrasonic transducers.
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Affiliation(s)
- Yuhou Sun
- National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Jingya Tao
- National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Feifei Guo
- School of Materials Science and Chemical Engineering, Xi'an Technological University, Xi'an, China
| | - Fulin Wang
- National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China.
| | - Jie Dong
- National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Li Jin
- National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Shiyang Li
- Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Xingyi Huang
- Shanghai Key Lab of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, China
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Sun Y, Jiang L, Chen R, Li R, Kang H, Zeng Y, Yan Y, Priya S, Zhou Q. Design and Fabrication of 15-MHz Ultrasonic Transducers Based on a Textured Pb(Mg 1/3Nb 2/3)O 3-Pb(Zr, Ti)O 3 Ceramic. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2022; 69:3095-3101. [PMID: 35073262 DOI: 10.1109/tuffc.2022.3145882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Ultrasound medical imaging is an entrenched and powerful tool for medical diagnosis. Image quality in ultrasound is mainly dependent on performance of piezoelectric transducer elements, which is further related to the electromechanical performance of the constituent piezoelectric materials. With rising need for piezoelectric materials with better performance and low cost, a highly 〈001〉 textured piezo ceramic, Pb(Mg1/3Nb2/3)O3-Pb(Zr, Ti)O3, has been developed. Recently, textured ceramic materials can be produced at low cost and exhibit high piezoelectric strain constants and large electromechanical coupling coefficients. In this work, 15-MHz ultrasonic transducers with an effective aperture of 2.5 mm in diameter based on these highly 〈001〉 textured ceramics have been successfully fabricated. The fabricated transducers achieved a central frequency of 15 MHz, a fractional bandwidth of 67% (at -6 dB), a high effective electromechanical coupling coefficient [Formula: see text] of 0.55, and a low insertion loss (IL) of 21 dB. Ex vivo ultrasonic imaging of a porcine eyeball was used to assess the tomography quality of the transducer. The results show that utilized textured ceramic has a great potential in developing ultrasonic devices for biomedical imaging purposes.
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Nguyen TP, Choi J, Nguyen VT, Mondal S, Bui NT, Vu DD, Park S, Oh J. Design and Micro-Fabrication of Focused High-Frequency Needle Transducers for Medical Imaging. SENSORS (BASEL, SWITZERLAND) 2022; 22:3763. [PMID: 35632172 PMCID: PMC9143298 DOI: 10.3390/s22103763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/09/2022] [Accepted: 05/13/2022] [Indexed: 01/25/2023]
Abstract
In this study, we report an advanced fabrication technique to develop a miniature focused needle transducer. Two different types of high-frequency (100 MHz) transducers were fabricated using the lead magnesium niobate-lead titanate (PMN-0.3PT) and lithium niobate (LiNbO3) single crystals. In order to enhance the transducer's performance, a unique mass-spring matching layer technique was adopted, in which gold and parylene play the roles of the mass layer and spring layer, respectively. The PMN-0.3PT transducer had a 103 MHz center frequency with a -6 dB bandwidth of 52%, and a signal-to-noise ratio (SNR) of 42 dB. The center frequency, -6 dB bandwidth, and SNR of the LiNbO3 transducer were 105 MHz, 66%, and 44 dB, respectively. In order to compare and evaluate the transducers' performances, an ultrasonic biomicroscopy (UBM) imaging on the fish eye was performed. The results showed that the LiNbO3 transducer had a better contrast resolution compared to the PMN-0.3PT transducer. The fabricated transducer showed an excellent performance with high-resolution corneal epithelium imaging of the experimental fish eye. These interesting findings are useful for the future biomedical implementation of the fabricated transducers in the field of high-resolution ultrasound imaging and diagnosis purpose.
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Affiliation(s)
- Thanh Phuoc Nguyen
- Department of Mechatronics, Cao Thang Technical College, Ho Chi Minh City 700000, Vietnam
| | - Jaeyeop Choi
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, Korea; (J.C.); (V.T.N.); (D.D.V.); (S.P.); (J.O.)
| | - Van Tu Nguyen
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, Korea; (J.C.); (V.T.N.); (D.D.V.); (S.P.); (J.O.)
| | - Sudip Mondal
- New-Senior Healthcare Innovation Center (BK21 Plus), Pukyong National University, Busan 48513, Korea;
| | - Ngoc Thang Bui
- Institute of Engineering, HUTECH University, Ho Chi Minh City 700000, Vietnam;
| | - Dinh Dat Vu
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, Korea; (J.C.); (V.T.N.); (D.D.V.); (S.P.); (J.O.)
| | - Sumin Park
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, Korea; (J.C.); (V.T.N.); (D.D.V.); (S.P.); (J.O.)
| | - Junghwan Oh
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, Korea; (J.C.); (V.T.N.); (D.D.V.); (S.P.); (J.O.)
- New-Senior Healthcare Innovation Center (BK21 Plus), Pukyong National University, Busan 48513, Korea;
- Ohlabs Corporation, Busan 48513, Korea
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Costa T, Shi C, Tien K, Elloian J, Cardoso FA, Shepard KL. An Integrated 2D Ultrasound Phased Array Transmitter in CMOS With Pixel Pitch-Matched Beamforming. IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS 2021; 15:731-742. [PMID: 34260357 DOI: 10.1109/tbcas.2021.3096722] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Emerging non-imaging ultrasound applications, such as ultrasonic wireless power delivery to implantable devices and ultrasound neuromodulation, require wearable form factors, millisecond-range pulse durations and focal spot diameters approaching 100 μm with electronic control of its three-dimensional location. None of these are compatible with typical handheld linear array ultrasound imaging probes. In this work, we present a 4 mm × 5 mm 2D ultrasound phased array transmitter with integrated piezoelectric ultrasound transducers on complementary metal-oxide-semiconductor (CMOS) integrated circuits, featuring pixel-level pitch-matched transmit beamforming circuits which support arbitrary pulse duration. Our direct integration method enabled up to 10 MHz ultrasound arrays in a patch form-factor, leading to focal spot diameter of ∼200 μm, while pixel pitch-matched beamforming allowed for precise three-dimensional positioning of the ultrasound focal spot. Our device has the potential to provide a high-spatial resolution and wearable interface to both powering of highly-miniaturized implantable devices and ultrasound neuromodulation.
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Wang Y, Tao J, Guo F, Li S, Huang X, Dong J, Cao W. Correction: Wang, Y.; et al. Magnesium Alloy Matching Layer for High-Performance Transducer Applications. Sensors 2018, 18, 4424. SENSORS 2019; 19:s19183888. [PMID: 31505871 PMCID: PMC6767257 DOI: 10.3390/s19183888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 08/12/2019] [Indexed: 11/16/2022]
Affiliation(s)
- Yulei Wang
- National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jingya Tao
- National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Feifei Guo
- National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Shiyang Li
- Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xingyi Huang
- Shanghai Key Lab of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jie Dong
- National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Wenwu Cao
- Department of Mathematics and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA
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