Spatialoral ultrasound imaging of residual cavitation bubbles around a fluid-tissue interface in histotripsy
Journal of the Acoustical Society of America, ISSN: 0001-4966, Vol: 137, Issue: 5, Page: 2563-2572
2015
- 23Citations
- 23Captures
- 1Mentions
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Metrics Details
- Citations23
- Citation Indexes23
- CrossRef23
- 22
- Captures23
- Readers23
- 23
- Mentions1
- News Mentions1
- News1
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Article Description
Cavitation is considered as the primary mechanism of soft tissue fragmentation (histotripsy) by pulsed high-intensity focused ultrasound. The residual cavitation bubbles have a dual influence on the histotripsy pulses: these serve as nuclei for easy generation of new cavitation, and act as strong scatterers causing energy "shadowing." To monitor the residual cavitation bubbles in histotripsy, an ultrafast active cavitation imaging method with relatively high signal-to-noise ratio and good spatialoral resolution was proposed in this paper, which combined plane wave transmission, minimum variance beamforming, and coherence factor weighting. The spatialoral evolutions of residual cavitation bubbles around a fluid-tissue interface in histotripsy under pulse duration (PD) of 10-40uμs and pulse repetition frequency (PRF) of 0.67-2-kHz were monitored by this method. The integrated bubble area curves inside the tissue interface were acquired from the bubble image sequence, and the formation process of histotripsy damage was estimated. It was observed that the histotripsy efficiency decreased with both longer PDs and higher PRFs. A direct relationship with a coefficient of 1.0365 between histotripsy lesion area and inner residual bubble area was found. These results can assist in monitoring and optimization of the histotripsy treatment further.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84930226016&origin=inward; http://dx.doi.org/10.1121/1.4919286; http://www.ncbi.nlm.nih.gov/pubmed/25994689; https://pubs.aip.org/jasa/article/137/5/2563/907223/Spatial-temporal-ultrasound-imaging-of-residual; http://scitation.aip.org/content/asa/journal/jasa/137/5/10.1121/1.4919286; http://scitation.aip.org/limit_exceeded.html
Acoustical Society of America (ASA)
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