Self-healing: A new skill unlocked for ultrasound transducer

Li, Jiapu; Yang, Yang; Chen, Zeyu; Lei, Shuang; Shen, Maokang; Zhang, Tao; Lan, Xue‐Kai; Qin, Yijie; Ouyang, Jun; Yang, Xiaofei; Chen, Yong; Wang, Ziyu; Zhu, Benpeng

doi:10.1016/j.nanoen.2019.104348

Cited by 22 publications

(15 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Over the past few decades, due to its safety, convenience, and efficiency, ultrasound has attracted significant attention in biomedical research and clinical diagnosis [1][2][3][4][5][6]. To meet the requirement of high resolution imaging and precise manipulation, the operational frequency of biomedical ultrasound needs to be greater than 20 MHz.…”

Section: Introductionmentioning

confidence: 99%

PIN-PMN-PT Single Crystal 1-3 Composite-based 20 MHz Ultrasound Phased Array

et al. 2020

Self Cite

View full text Add to dashboard Cite

Based on a modified dice-and-fill technique, a PIN-PMN-PT single crystal 1-3 composite with the kerf of 12 μm and pitch of 50 μm was prepared. The as-made piezoelectric composite material behaved with high piezoelectric constant (d33 = 1500 pC/N), high electromechanical coefficient (kt = 0.81), and low acoustic impedance (16.2 Mrayls). Using lithography and flexible circuit method, a 48-element phased array was successfully fabricated from such a piezoelectric composite. The array element was measured to have a central frequency of 20 MHz and a fractional bandwidth of approximately 77% at −6 dB. Of particular significance was that this PIN-PMN-PT single crystal 1-3 composite-based phased array exhibits a superior insertion loss compared with PMN-PT single crystal and PZT-5H-based 20 MHz phased arrays. The focusing and steering capabilities of the obtained phased array were demonstrated theoretically and experimentally. These promising results indicate that the PIN-PMN-PT single crystal 1-3 composite-based high frequency phased array is a good candidate for ultrasound imaging applications.

show abstract

Section: Introductionmentioning

confidence: 99%

PIN-PMN-PT Single Crystal 1-3 Composite-based 20 MHz Ultrasound Phased Array

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…For the hard glass substrates, R 2 ≫ R 1 , and r p ≈ 1. Therefore, the B wave would be totally reflected at the glass interface, and the polarity of reflected sound wave would not change (see Supplementary Note 4) [37][38][39][40] .…”

Section: Resultsmentioning

confidence: 99%

“…3a. Clearly, the PDMS II layer is crucial, because its thickness determines the delayed distance of B wave and F wave 28,38 , and influence the superposition effect of two waves. Since the acoustic impedance of PDMS is similar to that of water, the reflection of sound wave at the interface between PDMS and water is negligible.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Lead halide perovskite for efficient optoacoustic conversion and application toward high-resolution ultrasound imaging

Niu

et al. 2021

Nat Commun

Self Cite

View full text Add to dashboard Cite

Lead halide perovskites have exhibited excellent performance in solar cells, LEDs and detectors. Thermal properties of perovskites, such as heat capacity and thermal conductivity, have rarely been studied and corresponding devices have barely been explored. Considering the high absorption coefficient (104~105 cm−1), low specific heat capacity (296–326 J kg−1 K−1) and small thermal diffusion coefficient (0.145 mm2 s−1), herein we showcase the successful use of perovskite in optoacoustic transducers. The theoretically calculated phonon spectrum shows that the overlap of optical phonons and acoustic phonons leads to the up-conversion of acoustic phonons, and thus results in experimentally measured low thermal diffusion coefficient. The assembled device of PDMS/MAPbI3/PDMS simultaneously achieves broad bandwidths (−6 dB bandwidth: 40.8 MHz; central frequency: 29.2 MHz), and high conversion efficiency (2.97 × 10−2), while all these parameters are the record values for optoacoustic transducers. We also fabricate miniatured devices by assembling perovskite film onto fibers, and clearly resolve the fine structure of fisheyes, which demonstrates the strong competitiveness of perovskite based optoacoustic transducers for ultrasound imaging.

show abstract

“…The developed ultrasound components need to be tested via pulse-echo analysis [49,50]. In the pulse-echo analysis, the amplitude and pulse width of the echo signal are related to the sensitivity of the transducer, and the −6 dB bandwidth and harmonic distortion components are related to the resolution of the transducer [51][52][53]. Figure 11a,b show the measurement setup for the pulse-echo analysis of the developed TVA+TVA or TVA+OVAI+TVA circuit.…”

Section: Pulse-echo Analysismentioning

confidence: 99%

Inter-Stage Output Voltage Amplitude Improvement Circuit Integrated with Class-B Transmit Voltage Amplifier for Mobile Ultrasound Machines

You

Choi

2020

Sensors

View full text Add to dashboard Cite

Piezoelectric transducers are triggered by the output voltage signal of a transmit voltage amplifier (TVA). In mobile ultrasound instruments, the sensitivity of piezoelectric transducers is a critical parameter under limited power supply from portable batteries. Therefore, the enhancement of the output voltage amplitude of the amplifier under limited power supply could increase the sensitivity of the piezoelectric transducer. Several-stage TVAs are used to increase the voltage amplitude. However, inter-stage design issues between each TVA block may reduce the voltage amplitude and bandwidth because the electronic components of the amplifier are nonlinearly operated at the desired frequency ranges. To compensate for this effect, we propose a novel inter-stage output voltage amplitude improvement (OVAI) circuit integrated with a class-B TVA circuit. We performed fundamental A-mode pulse-echo tests using a 15-MHz immersion-type piezoelectric transducer to verify the design. The echo amplitude and bandwidth when using an inter-stage OVAI circuit integrated with a class-B TVA circuit (696 mVPP and 29.91%, respectively) were higher than those obtained when using only the class-B TVA circuit (576 mVPP and 24.21%, respectively). Therefore, the proposed OVAI circuit could be beneficial for increasing the output amplitude of the class-B TVA circuit for mobile ultrasound machines.

show abstract

Self-healing: A new skill unlocked for ultrasound transducer

Cited by 22 publications

References 33 publications

PIN-PMN-PT Single Crystal 1-3 Composite-based 20 MHz Ultrasound Phased Array

PIN-PMN-PT Single Crystal 1-3 Composite-based 20 MHz Ultrasound Phased Array

Lead halide perovskite for efficient optoacoustic conversion and application toward high-resolution ultrasound imaging

Inter-Stage Output Voltage Amplitude Improvement Circuit Integrated with Class-B Transmit Voltage Amplifier for Mobile Ultrasound Machines

Contact Info

Product

Resources

About