Imaging of acoustic attenuation and speed of sound maps using photoacoustic measurements

Rene Willemink, Srirang Manohar, Y. Purwar, Ferdinand van der Heijden, Cornelis H. Slump, Ton van Leeuwen

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

20 Citations (Scopus)

Abstract

Photoacoustic imaging is an upcoming medical imaging modality with the potential of imaging both optical and acoustic properties of objects. We present a measurement system and outline reconstruction methods to image both speed of sound and acoustic attenuation distributions of an object using only pulsed light excitation. These acoustic properties can be used in a subsequent step to improve the image quality of the optical absorption distribution. A passive element, which is a high absorbing material with a small cross-section such as a carbon fiber, is introduced between the light beam and the object. This passive element acts as a photoacoustic source and measurements are obtained by allowing the generated acoustic signal to propagate through the object. From these measurements we can extract measures of line integrals over the acoustic property distribution for both the speed of sound and the acoustic attenuation. Reconstruction of the acoustic property distributions then comes down to the inversion of a linear system relating the obtained projection measurements to the acoustic property distributions. We show the results of applying our approach on phantom objects. Satisfactory results are obtained for both the reconstruction of speed of sound and the acoustic attenuation.
Original languageUndefined
Title of host publicationMedical Imaging 2008: Ultrasonic Imaging and Signal Processing
EditorsS.A. McAleavey, J. D'Hooge
Place of PublicationSan Diego
PublisherSPIE
Pages692013
Number of pages12
ISBN (Print)978-0-81947-104-8
DOIs
Publication statusPublished - Mar 2008
EventSPIE Medical Imaging 2008 - Town & Country Resort and Convention Center, San Diego, United States
Duration: 16 Feb 200821 Feb 2008

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume6920
ISSN (Print)0277-786X

Conference

ConferenceSPIE Medical Imaging 2008
CountryUnited States
CitySan Diego
Period16/02/0821/02/08

Keywords

  • EWI-15047
  • METIS-250796
  • IR-62728

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