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<p>High-frequency ultrasound imaging offers spatial resolutions at the scale of tens of micrometers, which facilitates precise medical diagnostics. A novel randomized short-fiber 1–3 PZT piezocomposite was fabricated via a soft-mold process, which was designed to improve element-to-element uniformity in 20&#xa0;MHz ultrasonic linear array transducers. The finite-element analysis (FEA) was performed to compare the vibration modes of ordered and randomized pillar configurations. A linear array with 64 elements was constructed by using the fabricated piezocomposite. The center frequency of the transducer was measured to be 20&#xa0;MHz and the bandwidth was 60%@ − 6&#xa0;dB. Notably, the randomized 1–3 composite maintained a high electromechanical coupling coefficient (<i>k</i><sub>t</sub> = 0.70) while significantly reducing performance variations among array elements. These results demonstrate that the randomized 1–3 piezocomposite offers a promising pathway toward next-generation uniform, high-frequency ultrasound arrays.</p>

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Enhanced element uniformity in high-frequency ultrasound arrays via randomized short-fiber 1–3 piezocomposite design

  • 期刊论文

  • 发表日期：

    2026年4月12日

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  • Yili Hu,
  • Xiaobing Li,
  • Siping Chen,
  • Xi Tang,
  • Qian Chen,
  • Jiangtao Zeng,
  • Shiyi Ou,
  • Jie Jiao

摘要

High-frequency ultrasound imaging offers spatial resolutions at the scale of tens of micrometers, which facilitates precise medical diagnostics. A novel randomized short-fiber 1–3 PZT piezocomposite was fabricated via a soft-mold process, which was designed to improve element-to-element uniformity in 20 MHz ultrasonic linear array transducers. The finite-element analysis (FEA) was performed to compare the vibration modes of ordered and randomized pillar configurations. A linear array with 64 elements was constructed by using the fabricated piezocomposite. The center frequency of the transducer was measured to be 20 MHz and the bandwidth was 60%@ − 6 dB. Notably, the randomized 1–3 composite maintained a high electromechanical coupling coefficient (kt = 0.70) while significantly reducing performance variations among array elements. These results demonstrate that the randomized 1–3 piezocomposite offers a promising pathway toward next-generation uniform, high-frequency ultrasound arrays.