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Contact‐free endoscopic photoacoustic sensing using speckle analysis
Author(s) -
Lengenfelder Benjamin,
Mehari Fanuel,
Hohmann Martin,
Löhr Cita,
Waldner Maximilian J.,
Schmidt Michael,
Zalevsky Zeev,
Klämpfl Florian
Publication year - 2019
Publication title -
journal of biophotonics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 66
eISSN - 1864-0648
pISSN - 1864-063X
DOI - 10.1002/jbio.201900130
Subject(s) - speckle pattern , photoacoustic imaging in biomedicine , imaging phantom , materials science , biomedical engineering , transducer , laser , optics , ultrasound , acoustics , radiology , medicine , physics
Abstract Photoacoustic endoscopy (PAE) is an emerging imaging modality, which offers a high imaging penetration and a high optical contrast in soft tissue. Most of the developed endoscopic photoacoustic sensing systems use miniaturized contact ultrasound transducers or complex optical approaches. In this work, a new fiber‐based detection technique using speckle analysis for contact‐free signal detection is presented. Phantom and ex vivo experiments are performed in transmission and reflection mode for proof of concept. In summary, the potential of the technique for endoscopic photoacoustic signal detection is demonstrated. The new technique might help in future to broaden the applications of PAE in imaging or guiding minimally invasive laser procedures.