Share Email Print
cover

Proceedings Paper

Towards non-contact photo-acoustic endoscopy using speckle pattern analysis
Author(s): Benjamin Lengenfelder; Fanuel Mehari; Yuqi Tang; Florian Klämpfl; Zeev Zalevsky; Michael Schmidt
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Photoacoustic Tomography combines the advantages of optical and acoustic imaging as it makes use of the high optical contrast of tissue and the high resolution of ultrasound. Furthermore, high penetration depths in tissue in the order of several centimeters can be achieved by the combination of these modalities. Extensive research is being done in the field of miniaturization of photoacoustic devices, as photoacoustic imaging could be of significant benefits for the physician during endoscopic interventions. All the existing miniature systems are based on contact transducers for signal detection that are placed at the distal end of an endoscopic device. This makes the manufacturing process difficult and impedance matching to the inspected surface a requirement. The requirement for contact limits the view of the physician during the intervention. Consequently, a fiber based non-contact optical sensing technique would be highly beneficial for the development of miniaturized photoacoustic endoscopic devices. This work demonstrates the feasibility of surface displacement detection using remote speckle-sensing using a high speed camera and an imaging fiber bundle that is used in commercially available video endoscopes. The feasibility of displacement sensing is demonstrated by analysis of phantom vibrations which are induced by loudspeaker membrane oscillations. Since the usability of the remote speckle-sensing for photo-acoustic signal detection was already demonstrated, the fiber bundle approach demonstrates the potential for non-contact photoacoustic detections during endoscopy.

Paper Details

Date Published: 3 March 2017
PDF: 6 pages
Proc. SPIE 10064, Photons Plus Ultrasound: Imaging and Sensing 2017, 1006436 (3 March 2017); doi: 10.1117/12.2250563
Show Author Affiliations
Benjamin Lengenfelder, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Erlangen Graduate School in Advanced Optical Technologies (Germany)
Fanuel Mehari, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Erlangen Graduate School in Advanced Optical Technologies (Germany)
Yuqi Tang, Rice Univ. (United States)
Florian Klämpfl, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Zeev Zalevsky, Erlangen Graduate School in Advanced Optical Technologies (Germany)
Bar-Ilan Univ. (Israel)
Michael Schmidt, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Erlangen Graduate School in Advanced Optical Technologies (Germany)


Published in SPIE Proceedings Vol. 10064:
Photons Plus Ultrasound: Imaging and Sensing 2017
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

© SPIE. Terms of Use
Back to Top