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Non-contact optoacoustic imaging with focused air-coupled transducers.
Appl. Phys. Lett. 107:051105 (2015)
Publ. Version/Full Text
DOI
Non-contact optoacoustic imaging employing raster-scanning of a spherically focused air-coupled ultrasound transducer is showcased herein. Optoacoustic excitation with laser fluence within the maximal permissible human exposure limits in the visible and near-infrared spectra is applied to objects with characteristic dimensions smaller than 1 mm and absorption properties representative of the whole blood at near-infrared wavelengths, and these signals are shown to be detectable without contact to the sample using an air-coupled transducer with reasonable signal averaging. Optoacoustic images of vessel-mimicking tubes embedded in an agar phantom captured with this non-contact sensing technique are also showcased. These initial results indicate that an air-coupled ultrasound detection approach can be suitable for non-contact biomedical imaging with optoacoustics.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Photoacoustic Microscopy; In-vivo; Tomography; Interferometer; Detector; Cancer; Organs; Array
ISSN (print) / ISBN
0003-6951
e-ISSN
1077-3118
Journal
Applied Physics Letters
Quellenangaben
Volume: 107,
Issue: 5,
Article Number: 051105
Publisher
American Institute of Physics (AIP)
Publishing Place
Melville
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Biological and Medical Imaging (IBMI)