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Proceedings Paper

Photoacoustic signal formation in absorbing and scattering liquids
Author(s): Seppo M. Nissilae; Onni Ahola; Harri K. Kopola; Risto A. Myllylae; Jussi Tenhunen; Zuomin Zhao
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Paper Abstract

The so-called photoacoustic technique combines optical properties, such as absorption and scattering, with acoustic properties, such as sound velocity and absorption, to monitor and measure the physical properties of materials. This paper comprises a theoretical study on the properties of acoustic pulses and a discussion on earlier theories presented in literature. It also describes and analyzes the results of simulation tests based on the Monte-Carlo method, undertaken to examine the effects that absorption and scattering co-efficients of two-layer media have on the shape of the acoustic transmitter. Finally, the theoretical results are corroborated with measurements using a CO2 laser and a two-wavelength diode laser PA system, developed during the study.

Paper Details

Date Published: 1 January 1998
PDF: 11 pages
Proc. SPIE 3199, Biomedical Systems and Technologies II, (1 January 1998); doi: 10.1117/12.301101
Show Author Affiliations
Seppo M. Nissilae, Univ. of Oulu (Finland)
Onni Ahola, Univ. of Oulu (Finland)
Harri K. Kopola, Technical Research Ctr. of Finland (Finland)
Risto A. Myllylae, Univ. of Oulu (Finland)
Jussi Tenhunen, Technical Research Ctr. of Finland (Finland)
Zuomin Zhao, Univ. of Oulu (Finland)


Published in SPIE Proceedings Vol. 3199:
Biomedical Systems and Technologies II
Francesco Baldini; Nathan I. Croitoru; Mark Russell Dickinson; Martin Frenz; Mitsunobu Miyagi; Riccardo Pratesi; Stefan Seeger, Editor(s)

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