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A single crystal row-column-array for 3D ultrasound imaging.

Guo Li¹, Qiandong Sun², Yapeng Fu²

¹Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China; School of Automation, Xi'an University of Posts &Telecommunications, Xi'an, China.

|March 16, 2024

Summary

Researchers developed a novel 7-MHz 128+128 row-column-array (RCA) transducer using PMN-0.28PT single crystal for high-quality 3D ultrasound imaging. This cost-effective fabrication advances biomedical research and clinical applications.

Keywords:

Biomedical imaging Biomedical transducers Ferroelectric devices Ultrasonic transducer arrays

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Area of Science:

Biomedical Engineering
Materials Science
Medical Imaging

Background:

3D ultrasound imaging is crucial for clinical and research applications.
Current 2D-array transducers are complex and expensive due to numerous electronic channels.

Purpose of the Study:

To develop a new, cost-effective fabrication process for a 7-MHz 128+128 element row-column-array (RCA) transducer.
To evaluate the performance and imaging capabilities of the developed RCA transducer.

Main Methods:

Fabrication of a 7-MHz 128+128 RCA transducer using relaxor ferroelectric PMN-0.28PT single crystal.
Optimization of piezoelectric properties and acoustic matching.
Quantification of axial and lateral imaging resolutions using point spread function (PSF).
Experimental validation on a hyperechoic phantom.

Main Results:

Achieved -6 dB bandwidth of ~82% and insertion loss of -44.6 dB.
Measured axial resolution of 0.20 mm and lateral resolution of 0.41 mm at 7.7 mm depth.
Obtained high-quality 3D ultrasound images, including B-mode slices, on a phantom.

Conclusions:

The developed RCA transducer offers a simplified fabrication and reduced hardware cost for 3D ultrasound.
The transducer demonstrates excellent performance, enabling high-quality 3D imaging.
This technology holds significant potential for ultrafast and functional 3D ultrasound imaging.