title: Photoacoustic imaging using an adaptive interferometer with a photorefractive crystal.
abstract: In this paper we report on remote three-dimensional photoacoustic imaging without the need for a coupling agent or other aids (e.g. detector foils) by utilizing a two-wave mixing interferometer (TWMI). In this technique the beams coming from sample and reference are brought to interfere in a Bi₁₂SiO₂₀ photorefractive crystal (PRC). Such a setup allows the measurement of ultrasonic displacements on rough sample surfaces. After data acquisition the initial pressure distribution is reconstructed by a Fourier domain synthetic aperture focusing technique (FSAFT). We present three-dimensional imaging of a hair ribbon phantom, on biological samples with embedded artificial blood vessels or pig bristles, and measurements on a human forearm in-vivo.
authors.affiliation: Christian Doppler Laboratory for Photoacoustic Imaging and Laser Ultrasonics, Altenbergerstrasse 69, 4040 Linz, Austria. armin.hochreiner@recendt.at
authors.forename: Armin
authors.initials: A
authors.lastname: Hochreiner
authors.forename: Thomas
authors.initials: T
authors.lastname: Berer
authors.forename: Hubert
authors.initials: H
authors.lastname: Grün
authors.forename: Michael
authors.initials: M
authors.lastname: Leitner
authors.forename: Peter
authors.initials: P
authors.lastname: Burgholzer
mesh_terms: D000273:Adipose Tissue / Q000098:blood supply; D000465:Algorithms; D000818:Animals; D001808:Blood Vessels / Q000166:cytology; D003460:Crystallization; D005542:Forearm; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007368:Interferometry / Q000295:instrumentation / Q000379:methods*; D008027:Light; D008892:Milk / Q000737:chemistry; D057054:Molecular Imaging / Q000295:instrumentation / Q000379:methods*; D055620:Optical Phenomena; D019047:Phantoms, Imaging; D061088:Photoacoustic Techniques / Q000295:instrumentation / Q000379:methods*; D012867:Skin / Q000166:cytology; D013499:Surface Properties; D013552:Swine; D014867:Water / Q000737:chemistry
chemical_list: D014867:Water