Coupling Two Ultra-high-Speed Cameras to Elucidate Ultrasound Contrast-Mediated Imaging and Therapy

Hongchen Li*, Xiufeng Li, Gonzalo Collado-Lara, Kirby R. Lattwein, Frits Mastik, Robert Beurskens, Antonius F.W. van der Steen, Martin D. Verweij, Nico de Jong, Klazina Kooiman

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Ultrasound contrast-mediated medical imaging and therapy both rely on the dynamics of micron- and nanometer-sized ultrasound cavitation nuclei, such as phospholipid-coated microbubbles and phase-change droplets. Ultrasound cavitation nuclei respond non-linearly to ultrasound on a nanosecond time scale that necessitates the use of ultra-high-speed imaging to fully visualize these dynamics in detail. In this study, we developed an ultra-high-speed optical imaging system that can record up to 20 million frames per second (Mfps) by coupling two small-sized, commercially available, 10-Mfps cameras. The timing and reliability of the interleaved cameras needed to achieve 20 Mfps was validated using two synchronized light-emitting diode strobe lights. Once verified, ultrasound-activated microbubble responses were recorded and analyzed. A unique characteristic of this coupled system is its ability to be reconfigured to provide orthogonal observations at 10 Mfps. Acoustic droplet vaporization was imaged from two orthogonal views, by which the 3-D dynamics of the phase transition could be visualized. This optical imaging system provides the temporal resolution and experimental flexibility needed to further elucidate the dynamics of ultrasound cavitation nuclei to potentiate the clinical translation of ultrasound-mediated imaging and therapy developments.

Original languageEnglish
Pages (from-to)388-397
JournalUltrasound in Medicine and Biology
Volume49
Issue number1
DOIs
Publication statusPublished - 2023

Keywords

  • Cavitation
  • Droplet
  • Microbubble
  • Ultra-high-speed imaging
  • Ultrasound
  • Ultrasound contrast agents

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