Angled-focused 45MHz PMN-PT single element transducer for intravascular ultrasound imaging

Yoon, Sangpil; Williams, Jessica S.; Kang, Bong Jin; Yoon, Changhan; Cabrera-Munoz, Nestor E.; Jeong, Jong Seob; Lee, Sang Goo; Shung, K. Kirk; Kim, Hyunhee

doi:10.1016/j.sna.2015.02.037

Cited by 33 publications

(21 citation statements)

References 28 publications

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“…Angled-focused single-element transducer was another choice to improve IVUS lateral imaging resolution. As reported, the lateral resolution was improved from 270 μ m to 120 μ m with the angled-focused 45 MHz PMN-PT single-element transducer [11]. But the single crystal or PZT are fragile and easy to crack in the process, which would affect the transducer performance and yield, while 1-3 piezocomposite will be an alternative choice for the active material, which can have high frequency, low acoustic impedance, and wide bandwidth [12, 13].…”

Section: Introductionmentioning

confidence: 77%

A High Frequency Geometric Focusing Transducer Based on 1-3 Piezocomposite for Intravascular Ultrasound Imaging

Jian

Han

Liu

et al. 2017

BioMed Research International

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Due to the small aperture of blood vessel, a considerable disadvantage to current intravascular ultrasound (IVUS) imaging transducers is that their lateral imaging resolution is much lower than their axial resolution. To solve this problem, a single-element, 50 MHz, 0.6 mm diameter IVUS transducer with a geometric focus at 3 mm was proposed in this paper. The focusing transducer was based on a geometric-shaped 1-3 piezocomposite. The impedance/phase, pulse echo, acoustic intensity field, and imaging resolution of the focusing transducer were tested. For comparison, a flat IVUS transducer with the same diameter and 1-3 piezocomposite was made and tested too. Compared with their results, the fabricated focusing transducer exhibits broad bandwidth (107.21%), high sensitivity (404 mV), high axial imaging resolution (80 μm), and lateral imaging resolution (100 μm). The experimental results demonstrated that the high frequency geometric focusing piezocomposite transducer is capable of visualizing high axial and lateral resolution structure and improving the imaging quality of related interventional ultrasound imaging.

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Section: Introductionmentioning

confidence: 77%

A High Frequency Geometric Focusing Transducer Based on 1-3 Piezocomposite for Intravascular Ultrasound Imaging

Jian

Han

Liu

et al. 2017

BioMed Research International

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“…Increase in the center frequency of the transducers requires the reduction of thickness [64,[117][118][119]. It causes the impedance of the transducer to approach zero resulting in a severe electrical impedance mismatch.…”

Section: Filter Structure Based Networkmentioning

confidence: 99%

A Review of Electric Impedance Matching Techniques for Piezoelectric Sensors, Actuators and Transducers

Rathod

2019

Electronics

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Any electric transmission lines involving the transfer of power or electric signal requires the matching of electric parameters with the driver, source, cable, or the receiver electronics. Proceeding with the design of electric impedance matching circuit for piezoelectric sensors, actuators, and transducers require careful consideration of the frequencies of operation, transmitter or receiver impedance, power supply or driver impedance and the impedance of the receiver electronics. This paper reviews the techniques available for matching the electric impedance of piezoelectric sensors, actuators, and transducers with their accessories like amplifiers, cables, power supply, receiver electronics and power storage. The techniques related to the design of power supply, preamplifier, cable, matching circuits for electric impedance matching with sensors, actuators, and transducers have been presented. The paper begins with the common tools, models, and material properties used for the design of electric impedance matching. Common analytical and numerical methods used to develop electric impedance matching networks have been reviewed. The role and importance of electrical impedance matching on the overall performance of the transducer system have been emphasized throughout. The paper reviews the common methods and new methods reported for electrical impedance matching for specific applications. The paper concludes with special applications and future perspectives considering the recent advancements in materials and electronics.

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“…An ultrasonic transducer/array is a crucial component of an ultrasonic scanner such as those widely used in clinical diagnosis [1-7]. There has been a growing interest in transducers in the frequency range higher than 100 MHz for applications in single cell analysis, acoustic trapping, and studying mechanotransduction with improved lateral resolution [8-12].…”

Section: Introductionmentioning

confidence: 99%

Impedance matching network for high frequency ultrasonic transducer for cellular applications

et al. 2016

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An approach for the design of an impedance matching network (IMN) for high frequency ultrasonic transducers with large apertures based on impedance analysis for cellular applications is presented in this paper. The main objectives were to maximize energy transmission from the excitation source to the ultrasonic transducers for cell manipulation and to achieve low input parameters for the safe operation of an ultrasonic transducer because the piezoelectric material in high frequency ultrasonic transducers is prone to breakage due to its being extremely thin. Two ultrasonic transducers, which were made of lithium niobate single crystal with the thickness of 15 μm, having apertures of 4.3 mm (fnumber = 1.23) and 2.6 mm (fnumber = 0.75) were tested. L-type IMN was selected for high sensitivity and compact design of the ultrasonic transducers. The target center frequency was chosen as the frequency where the electrical admittance (∣Y∣) and phase angle (θz) from impedance analysis was maximal and zero, respectively. The reference center frequency and reference echo magnitude were selected as the center frequency and echo magnitude, measured by pulse-echo testing, of the ultrasonic transducer without IMN. Initial component values and topology of IMN were determined using the Smith chart, and pulse-echo testing was analyzed to verify the performance of the ultrasonic transducers with and without IMN. After several iterations between changing component values and topology of IMN, and pulse-echo measurement of the ultrasonic transducer with IMN, optimized component values and topology of IMN were chosen when the measured center frequency from pulse-echo testing was comparable to the target frequency, and the measured echo magnitude was at least 30% larger than the reference echo magnitude. Performance of an ultrasonic transducer with and without IMN was tested by observing a tangible dent on the surface of a plastic petridish and single cell response after an acoustic pulse was applied on a target cell.

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Angled-focused 45MHz PMN-PT single element transducer for intravascular ultrasound imaging

Cited by 33 publications

References 28 publications

A High Frequency Geometric Focusing Transducer Based on 1-3 Piezocomposite for Intravascular Ultrasound Imaging

A High Frequency Geometric Focusing Transducer Based on 1-3 Piezocomposite for Intravascular Ultrasound Imaging

A Review of Electric Impedance Matching Techniques for Piezoelectric Sensors, Actuators and Transducers

Impedance matching network for high frequency ultrasonic transducer for cellular applications

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