Analysis of a photoacoustic imaging system by the crosstalk matrix and singular value decomposition

Michael Roumeliotis, Robert Z. Stodilka, Mark A. Anastasio, Govind Chaudhary, Hazem Al-Aabed, Eldon Ng, Andrea Immucci, Jeffrey J.L. Carson

Research output: Contribution to journalArticlepeer-review

Abstract

Photoacoustic imaging is a hybrid imaging modality capable of producing contrast similar to optical imaging techniques but with increased penetration depth and resolution in turbid media by encoding the information as acoustic waves. In general, it is important to characterize the performance of a photoacoustic imaging system by parameters such as sensitivity, resolution, and contrast. However, system characterization can extend beyond these metrics by implementing advanced analysis via the crosstalk matrix and singular value decomposition. A method was developed to experimentally measure a matrix that represented the imaging operator for a photoacoustic imaging system. Computations to produce the crosstalk matrix were completed to provide insight into the spatially dependent sensitivity and aliasing for the photoacoustic imaging system. Further analysis of the imaging operator was done via singular value decomposition to estimate the capability of the imaging system to reconstruct objects and the inherent sensitivity to those objects. The results provided by singular value decomposition were compared to SVD results from a de-noised imaging operator to estimate the number of measurable singular vectors for the system. These characterization techniques can be broadly applied to any photoacoustic system and, with regards to the studied system, could be used as a basis for improvements to future iterations.

Original languageEnglish (US)
Pages (from-to)11406-11417
Number of pages12
JournalOptics Express
Volume18
Issue number11
DOIs
StatePublished - May 24 2010
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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