JBO Letters

Interventional multispectral photoacoustic imaging with a clinical ultrasound probe for discriminating nerves and tendons: an ex vivo pilot study

[+] Author Affiliations
Jean Martial Mari

University College London, Department of Medical Physics and Biomedical Engineering, Gower Street, London WC1E 6BT, United Kingdom

University of French Polynesia, GePaSud, Faa’a 98702, French Polynesia, France

Wenfeng Xia, Adrien E. Desjardins

University College London, Department of Medical Physics and Biomedical Engineering, Gower Street, London WC1E 6BT, United Kingdom

Simeon J. West

University College Hospital, Department of Anaesthesia, Main Theatres, Maple Bridge Link Corridor, Podium 3, 235 Euston Road, London NW1 2BU, United Kingdom

J. Biomed. Opt. 20(11), 110503 (Nov 18, 2015). doi:10.1117/1.JBO.20.11.110503
History: Received August 13, 2015; Accepted October 23, 2015
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Abstract.  Accurate and efficient identification of nerves is an essential component of peripheral nerve blocks. While ultrasound (US) imaging is increasingly used as a guidance modality, it often provides insufficient contrast for identifying nerves from surrounding tissues such as tendons. Electrical nerve stimulators can be used in conjunction with US imaging for discriminating nerves from surrounding tissues, but they are insufficient to reliably prevent neural punctures, so that alternative methods are highly desirable. In this study, an interventional multispectral photoacoustic (PA) imaging system was used to directly compare the signal amplitudes and spectra acquired from nerves and tendons ex vivo, for the first time. The results indicate that the system can provide significantly higher image contrast for discriminating nerves and tendons than that provided by US imaging. As such, photoacoustic imaging could be valuable as an adjunct to US for guiding peripheral nerve blocks.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Jean Martial Mari ; Wenfeng Xia ; Simeon J. West and Adrien E. Desjardins
"Interventional multispectral photoacoustic imaging with a clinical ultrasound probe for discriminating nerves and tendons: an ex vivo pilot study", J. Biomed. Opt. 20(11), 110503 (Nov 18, 2015). ; http://dx.doi.org/10.1117/1.JBO.20.11.110503


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