Cable-Shared Dual-Frequency Catheter for Intravascular Ultrasound

Su, Min; Zhang, Zhiqiang; Hong, Ju; Huang, Yaocai; Mu, Peitian; Yan, Yu; Liu, Rong; Liang, Suzi; Zheng, Hairong; Qiu, Weibao

doi:10.1109/tuffc.2019.2898256

Cited by 20 publications

(14 citation statements)

References 30 publications

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“…This is so because the higher the operating frequency, the lower the electrical impedance (<20 Ω), thus lowering the efficiency of electrical power delivery. To overcome this issue, a cable-shared dual-frequency catheter was developed, in which a single signal wire was used to connect both HF and LF elements to an imaging system [ 176 ]. The signal connection in the developed catheter is equal to a parallel connection of two signal wires because the housing serves as a ground.…”

Section: Ivus Transducersmentioning

confidence: 99%

Mechanically Rotating Intravascular Ultrasound (IVUS) Transducer: A Review

Sung

Chang

2021

Sensors

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Intravascular ultrasound (IVUS) is a valuable imaging modality for the diagnosis of atherosclerosis. It provides useful clinical information, such as lumen size, vessel wall thickness, and plaque composition, by providing a cross-sectional vascular image. For several decades, IVUS has made remarkable progress in improving the accuracy of diagnosing cardiovascular disease that remains the leading cause of death globally. As the quality of IVUS images mainly depends on the performance of the IVUS transducer, various IVUS transducers have been developed. Therefore, in this review, recently developed mechanically rotating IVUS transducers, especially ones exploiting piezoelectric ceramics or single crystals, are discussed. In addition, this review addresses the history and technical challenges in the development of IVUS transducers and the prospects of next-generation IVUS transducers.

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Section: Ivus Transducersmentioning

confidence: 99%

Mechanically Rotating Intravascular Ultrasound (IVUS) Transducer: A Review

Sung

Chang

2021

Sensors

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“…的基础上发展起来的一项成像技术, 超声成像的一些优良特性使得超声CT领域有着很好的发展前景 [33,34] . [35] . 在同一次扫描既可以获得常规血管内超声图像, 又可以额外获得超高清的血管内图像, 为血管内斑块诊疗提供了更多有用的信息.…”

Section: 组织力学参数的技术和设备成为医学临床的迫切需求unclassified

Advances and trends in ultrasound imaging and therapeutic technology

Zou¹,

Cai²,

Long³

et al. 2020

Sci. Sin.-Vitae

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“…In addition, there is no risk of radiation exposure [6,7]. However, most commercial ultrasound imaging devices have cables containing at least several dozen coaxial lines to power the transducer or share data between the transducer and the ultrasonic (ultrasound) system [8,9]. This type of cable is thick and long, obstructing scanning work, and its heavy weight can strain the arms and shoulders of users [10].…”

Section: Introductionmentioning

confidence: 99%

High-efficiency high-voltage class F amplifier for high-frequency wireless ultrasound systems

Kim

Choi

2021

PLoS ONE

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This paper presents a novel amplifier that satisfies both low distortion and high efficiency for high-frequency wireless ultrasound systems with limited battery life and size. While increasing the amplifier efficiency helps to address the problems for wireless ultrasound systems, it can cause signal distortion owing to harmonic components. Therefore, a new type of class F amplifier is designed to achieve high efficiency and low distortion. In the amplifier, the resonant circuit at each stage controls the harmonic components to reduce distortion and improve efficiency. Transformers with a large shunt resistor are also helpful to reduce the remaining noise in the input signal. The proposed class F amplifier is tested using simulations, and the voltage and current waveforms are analyzed to achieve correct operation with adequate efficiency and distortion. The measured performance of the class F amplifier has a gain of 23.2 dB and a power added efficiency (PAE) of 88.9% at 25 MHz. The measured DC current is 121 mA with a variance of less than 1% when the PA is operating. We measured the received echo signal through the pulse-echo response using a 25-MHz transducer owing to the compatibility of the designed class F amplifier with high- frequency transducers. The measured total harmonic distortion (THD) of the echo signal was obtained as 4.5% with a slightly low ring-down. The results show that the low THD and high PAE of the new high-efficiency and high-voltage amplifier may increase battery life and reduce the cooling fan size, thus providing a suitable environment for high-frequency wireless ultrasound systems.

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Cable-Shared Dual-Frequency Catheter for Intravascular Ultrasound

Cited by 20 publications

References 30 publications

Mechanically Rotating Intravascular Ultrasound (IVUS) Transducer: A Review

Mechanically Rotating Intravascular Ultrasound (IVUS) Transducer: A Review

Advances and trends in ultrasound imaging and therapeutic technology

High-efficiency high-voltage class F amplifier for high-frequency wireless ultrasound systems

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