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Temporal backward projection of optoacoustic pressure transients using fourier transform methods.
Journal article

Temporal backward projection of optoacoustic pressure transients using fourier transform methods.

  • 2001-07-28
Published in:
  • Physics in medicine and biology. - 2001
Acoustics
Algorithms
Fourier Analysis
Image Processing, Computer-Assisted
Models, Theoretical
Optics and Photonics
Pressure
Statistics as Topic
Time Factors
English In medical imaging different techniques have been developed to gain information from inside a tissue. Optoacoustics is a method to generate tomography pictures of tissue using Q-switched laser pulses. Due to thermal and pressure confinement, a short light pulse generates a pressure distribution inside tissue, which mirrors absorbing structures and can be measured outside the tissue. Using a temporal back-projection method, the pressure distribution measured on the tissue surface allows us to gain a tomography picture of the absorbing structures inside tissue. This study presents a novel computational algorithm, which, at least in principle, yields an exact reconstruction of the absorbing structures in three-dimensional space inside the tissue. The reconstruction is based on 2D pressure distributions captured outside at different delay times. The algorithm is tested in a simulation and back-projection of pressure transients of a small absorber and a single point source.
Language
  • English
Open access status
closed
Identifiers
Persistent URL
https://sonar.ch/global/documents/131208
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