Pressure estimation of ultra-high frequency ultrasound using gas vesicles

被引：0

作者：

Strohm, Eric M. ^{[1
,2
,3
]}

Wu, Di ^{[4
]}

Malounda, Dina ^{[4
]}

Nayak, Rohit ^{[4
]}

Shapiro, Mikhail G. ^{[4
,5
,6
]}

Kolios, Michael C. ^{[1
,2
,3
]}

机构：

[1] Department of Physics, Toronto Metropolitan University, formerly Ryerson University, Toronto,ON,M5B 2K3, Canada

[2] Institute for Biomedical Engineering, Science and Technology, A Partnership Between Toronto Metropolitan University, St. Michael's Hospital, Toronto,ON,M5B 2K3, Canada

[3] Keenan Research Centre for Biomedical Science, St. Michael's Hospital, Toronto,ON,M5B 1T8, Canada

[4] Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena,CA,91125, United States

[5] Division of Engineering and Applied Science, California Institute of Technology, Pasadena,CA,91125, United States

[6] Howard Hughes Medical Institute, California Institute of Technology, Pasadena,CA,91125, United States

来源：

Journal of the Acoustical Society of America | 2024年 / 156卷 / 06期

关键词：

Acoustic microscopy uses ultra-high frequency (UHF) ultrasound transducers over 80 MHz to perform high-resolution imaging. The pressure output of these transducers is unknown; as commercial calibrated hydrophones can measure pressure for transducers with frequencies only up to 80 MHz. This study used gas vesicle nanostructures (GVs) that collapse at 571 kPa to estimate the pressure of UHF transducers at 40; 80; 200; and 375 MHz. Agarose phantoms containing GVs were made; and a baseline ultrasound image was performed at low pressure to prevent GV collapse. Sections within the phantom were scanned at varying voltage to determine the GV collapse threshold. The pressure at full driving voltage was then calculated; assuming a linear relation between transducer voltage and pressure. The pressure calculated for the 40 MHz transducer was 2.2 ± 0.1 MPa at 21 °C. Using a hydrophone; the measured pressure was 2.1 ± 0.3 MPa; a difference of © 2024 Acoustical Society of America;

D O I：

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中图分类号：

学科分类号：

摘要：

Journal article (JA)

引用

页码：4193 / 4201

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