NDLI: Dual mode photoacoustic/acoustic microscopy with optical generation and detection

Content Provider	IEEE Xplore Digital Library
Author	Berer, T. Grun, H. Bauer-Marschallinger, J. Burgholzer, P. Passler, K. Nuster, R. Paltauf, G.
Copyright Year	2012
Description	Author affiliation: Res. Center for Non-Destruct. Testing GmbH, Linz, Austria (Berer, T.; Grun, H.; Bauer-Marschallinger, J.; Burgholzer, P.) \|\| Dept. of Phys., Karl-Franzens-Univ. Graz, Graz, Austria (Passler, K.; Nuster, R.; Paltauf, G.)
Abstract	We present a dual mode scanning microscope which provides simultaneously ultrasonic and photoacoustic images. Short laser pulses are used to excite photoacoustic waves in a sample and to generate focused acoustic waves on a conical target. Ultrasound generation for pulse-echo mode is done by illuminating an acoustic axicon, resulting in quasi diffraction free acoustic pulses. An optical ring-shaped detector measures photoacoustic signals and backscattered acoustic waves. Due to the annular shape of the detector mainly acoustic waves coming from the symmetry axis, i.e. A-scans, are acquired; thus no reconstruction algorithm is needed. By reason of the transducers geometry, the setup is operated in backward mode. The annular detector is realized by a polymer optical fiber bent into a ring shape, being part of a fiber optic Mach-Zehnder interferometer. The annular detector mainly detects signals on the symmetry axis; however, also off-axis signals are detected. Reduction of the imaging artifacts is demonstrated on simulated data with a kspace algorithm taking the geometry of the problem into account. Furthermore, we present measurements on phantom samples.
Starting Page	1
Ending Page	4
File Size	1023747
Page Count	4
File Format	PDF
ISBN	9781467345613
ISSN	19485719
e-ISBN	9781467345620
DOI	10.1109/ULTSYM.2012.0356
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-07
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Acoustics Optical fibers Detectors Optical interferometry Imaging Optical fiber sensors annular detector photoacoustic imaging ultrasonic imaging X-waves polymer optical fiber
Content Type	Text
Resource Type	Article

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