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Cai Y, Xu L, Zhang T, Suo D, Ma J. Ultrasound transducers with both imaging and power output capabilities by anti-matching at backing layers. APPLIED PHYSICS LETTERS 2024; 124. [DOI: 10.1063/5.0191191] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/11/2024]
Abstract
Precise ultrasound therapy requires long-term power output and imaging guidance. However, traditional therapeutic transducers do not have imaging capabilities due to the low bandwidth and long ringing. Whereas for a diagnostic transducer, 20%–30% of the energy is dissipated as heat in the backing layer, resulting in degradation of the transducer under high duty cycle and high voltage excitation. Therefore, the transducers with both power output and imaging capabilities are unmet demands for precise ultrasonic treatment. To address this problem, we propose an ultrasound transducer with both imaging and power output capabilities. An anti-matching layer is designed at the position of the backing layer of the transducer, which reflects the backward ultrasound waves to forward waves. Therefore, the majority of the energy is transmitted efficiently and little energy is dissipated in the backing layer. Finite element simulations demonstrated that a double-layer anti-matching design reflects 99.8% of the backward energy, resulting in an insertion loss of −27.7 dB. The performance was validated by a transducer prototype with transmission measurement using hydrophone and pulse-echo test. This design of transducers with both imaging and power output capabilities indicates a promising application of self-guided ultrasound therapy.
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Affiliation(s)
- Yiqi Cai
- School of Instrumentation and Optoelectronics Engineering, Beihang University 1 , Beijing 100191, China
| | - Lijun Xu
- School of Instrumentation and Optoelectronics Engineering, Beihang University 1 , Beijing 100191, China
| | - Teng Zhang
- School of Instrumentation and Optoelectronics Engineering, Beihang University 1 , Beijing 100191, China
| | - Dingjie Suo
- School of Medical Technology, Beijing Institute of Technology 2 , Beijing 100081, China
| | - Jianguo Ma
- School of Instrumentation and Optoelectronics Engineering, Beihang University 1 , Beijing 100191, China
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Evaluating an Ultrasonic Magnetostrictive Transducer with Conical Nickel Core: Performance and Application. FOOD BIOPROCESS TECH 2022. [DOI: 10.1007/s11947-022-02953-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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