Estimate of effective singular values of a photoacoustic imaging system by noise characterization

Michael B. Roumeliotis, Mark A. Anastasio, Jeffrey J.L. Carson

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Photoacoustic imaging is a dual imaging modality capable of producing images with inherent contrast on par to optical imaging techniques but with depth penetration and resolution similar to ultrasound imaging techniques. This is accomplished by a short laser pulse, capable of producing acoustic waves that contain characteristic information determined by the optical properties of the system. In this paper, a method was utilized to acquire an experimental imaging operator of a photoacoustic system with 30 transducers organized in a hemispherical array. Two imaging operators were derived from the experimental matrix in order to delineate the contribution of signals to the imaging operator that stemmed separately from photoacoustic signal and noise. After producing three individual imaging operators, singular value decomposition was performed on each. The magnitudes of the singular values produced from the decomposition were plotted against their index and the trends in the singular values were examined in order to understand the behavior of the photoacoustic system as it pertains to the quantity of photoacoustic signal and noise recorded in the useful imaging volume. As well, plots of the object space singular vectors at indices of specific interest were plotted in order to qualitatively confirm the expectation of information content in the singular vectors.

Original languageEnglish (US)
Title of host publicationPhotons Plus Ultrasound
Subtitle of host publicationImaging and Sensing 2011
StatePublished - May 5 2011
Externally publishedYes
EventPhotons Plus Ultrasound: Imaging and Sensing 2011 - San Francisco, CA, United States
Duration: Jan 23 2011Jan 25 2011

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


ConferencePhotons Plus Ultrasound: Imaging and Sensing 2011
CountryUnited States
CitySan Francisco, CA


  • Characterization
  • Imaging operator
  • Noise
  • Photoacoustic imaging
  • Singular value decomposition

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging

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