3D photoacoustic imaging using staring, sparse array with 60 transducers

Michael B. Roumeliotis, Ivan Kosik, Jeffrey J.L. Carson

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

Abstract

Photoacoustic imaging is a hybrid imaging modality capable of producing images based on optical contrast, but with depth penetration and resolution similar to ultrasound imaging. In this work, a staring, sparse approach to 3D photoacoustic imaging was used to image a number of objects. The photoacoustic system described in this paper improved upon a previous generation that contained 30 commercial transducers, by incorporating 60 custom-built transducers into a compact hemispherical array. Imaging was performed by acquiring an experimental estimate of the imaging operator and solving a linear system model to provide an estimate of the object. The imaging operator contained 18,000 voxels, each at 0.5-mm isotropic resolution. The dimensions of the imaging operator were 30 mm × 30 mm × 2.5 mm. In the first experiment, a black wire was arranged in a triangular shape and imaged in a 0.3% Intralipid™ solution. The second experiment utilized a rotating human hair, where the hair was imaged at different angular positions. Both objects were successfully captured with reasonable accuracy, though image artifacts were present in both sets of images. The experimental results demonstrated that objects of substantial geometrical complexity could be reconstructed using measurements from only 60 transducers with prior knowledge of the imaging operator.

Original languageEnglish (US)
Title of host publicationPhotons Plus Ultrasound
Subtitle of host publicationImaging and Sensing 2012
DOIs
StatePublished - 2012
Externally publishedYes
EventPhotons Plus Ultrasound: Imaging and Sensing 2012 - San Francisco, CA, United States
Duration: Jan 22 2012Jan 24 2012

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume8223
ISSN (Print)1605-7422

Other

OtherPhotons Plus Ultrasound: Imaging and Sensing 2012
Country/TerritoryUnited States
CitySan Francisco, CA
Period1/22/121/24/12

Keywords

  • Photoacoustic imaging
  • Staring array
  • Three-dimensional

ASJC Scopus subject areas

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

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