3.8 Proceedings Paper

PDMS Composites with Photostable NIR Dyes for B-Mode Ultrasound Imaging

出版社

IEEE
DOI: 10.1109/IUS54386.2022.9958064

关键词

ultrasound; fibre optic; PDMS; NIR dyes; all-optical ultrasound

资金

  1. Royal Academy of Engineering [RF/201819/18/125]
  2. Wellcome/EPRSC Centre for Interventional and Surgical Sciences [203145/Z/16/Z]
  3. Wellcome Trust [203145/Z/16/Z] Funding Source: Wellcome Trust

向作者/读者索取更多资源

This study demonstrates B-mode all-optical ultrasound imaging using a cost-effective and simple to manufacture composite. The composite is compared with an established ultrasound-generating composite and their imaging resolution and signal-to-noise ratio are evaluated.
All-optical ultrasound has rapidly progressed as an imaging paradigm well-suited to application in minimally invasive surgical scenarios, moving from benchtop to in vivo studies. In this work, we build on previous studies, demonstrating B-mode all-optical ultrasound imaging using a composite comprising a photostable near-infrared absorbing dye and polydimethylsiloxane. This composite is cost-effective and simple to manufacture, and capable of generating broadband (ca. 35 MHz) and high-pressure (ca. 1.5 MPa) ultrasound. The composite was compared with an established ultrasound-generating composite: reduced graphene oxide with polydimethlysiloxane. Both materials were coated on multimode optical fibres and were optically and ultrasonically characterized. Further, the transmitters were coupled with a piano-concave microresonator for ultrasound reception and synthetic aperture B-mode pulse-echo US imaging of a tungsten wire phantom and ex vivo swine aorta tissue was performed. The images acquired using each transmitter were compared in terms of the image resolution and signal-to-noise ratio.

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