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New Sm-PMN-PT Ceramic-Based 2-D Array for Low-Intensity Ultrasound Therapy Application

Journal Article


Abstract


  • A two-dimensional (2-D) array with a small pitch (approximately 0.5�� in medium) can achieve complete 3-D control of ultrasound beams without grating lobes and enable the generation of multiple focal spots simultaneously, which is a desired tool for noninvasive therapy. However, the large electrical impedance of 2-D array elements owing to their small size results in a low energy transfer efficiency between a 2-D array and an electrical system, thereby limiting their practical applications. This article presents the development of a 1-MHz 256-element 2-D array ultrasonic transducer of low electrical impedance based on a new Sm-doped Pb(Mg1/3Nb2/3)O3-PbTiO3 (Sm-PMN-PT) piezoceramic with ultrahigh dielectric permittivity. The electrical impedance of the array element is decreased by 3.4 times as the Sm-PMN-PT replacing commercial PZT-5H. Consequently, the output acoustic pressure of the 2-D array made of Sm-PMN-PT ceramic is approximately twice that of the 2-D array made of PZT-5H ceramic under the same excitation conditions. Array elements are spaced at a 1.1-mm pitch (0.71�� in water), enabling a large steering range of the ultrasound beam. A multiple-target blood-brain barrier opening in vivo is demonstrated using the proposed 2-D array with electronic focusing and steering. The obtained results indicate that the 2-D array made of Sm-PMN-PT ceramic is promising for practical use in low-intensity ultrasound therapy applications.

Publication Date


  • 2020

Citation


  • Zhang, Z., Su, M., Li, F., Liu, R., Cai, R., Li, G., . . . Qiu, W. (2020). New Sm-PMN-PT Ceramic-Based 2-D Array for Low-Intensity Ultrasound Therapy Application. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 67(10), 2085-2094. doi:10.1109/TUFFC.2020.2979471

Scopus Eid


  • 2-s2.0-85091808115

Start Page


  • 2085

End Page


  • 2094

Volume


  • 67

Issue


  • 10

Place Of Publication


Abstract


  • A two-dimensional (2-D) array with a small pitch (approximately 0.5�� in medium) can achieve complete 3-D control of ultrasound beams without grating lobes and enable the generation of multiple focal spots simultaneously, which is a desired tool for noninvasive therapy. However, the large electrical impedance of 2-D array elements owing to their small size results in a low energy transfer efficiency between a 2-D array and an electrical system, thereby limiting their practical applications. This article presents the development of a 1-MHz 256-element 2-D array ultrasonic transducer of low electrical impedance based on a new Sm-doped Pb(Mg1/3Nb2/3)O3-PbTiO3 (Sm-PMN-PT) piezoceramic with ultrahigh dielectric permittivity. The electrical impedance of the array element is decreased by 3.4 times as the Sm-PMN-PT replacing commercial PZT-5H. Consequently, the output acoustic pressure of the 2-D array made of Sm-PMN-PT ceramic is approximately twice that of the 2-D array made of PZT-5H ceramic under the same excitation conditions. Array elements are spaced at a 1.1-mm pitch (0.71�� in water), enabling a large steering range of the ultrasound beam. A multiple-target blood-brain barrier opening in vivo is demonstrated using the proposed 2-D array with electronic focusing and steering. The obtained results indicate that the 2-D array made of Sm-PMN-PT ceramic is promising for practical use in low-intensity ultrasound therapy applications.

Publication Date


  • 2020

Citation


  • Zhang, Z., Su, M., Li, F., Liu, R., Cai, R., Li, G., . . . Qiu, W. (2020). New Sm-PMN-PT Ceramic-Based 2-D Array for Low-Intensity Ultrasound Therapy Application. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 67(10), 2085-2094. doi:10.1109/TUFFC.2020.2979471

Scopus Eid


  • 2-s2.0-85091808115

Start Page


  • 2085

End Page


  • 2094

Volume


  • 67

Issue


  • 10

Place Of Publication