Joint reconstruction of the sound speed and initial pressure distributions for ultrasound computed tomography and photoacoustic computed tomography

Thomas P. Matthews, Mark A. Anastasio

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

Abstract

Accurate reconstruction of the initial pressure distribution in photoacoustic computed tomography (PACT), in general, requires knowledge of the sound speed distribution of the medium. However, the sound speed distri-bution is often unknown, and estimating both the sound speed and initial pressure from PACT measurements alone is unstable. An alternative is to estimate the sound speed from ultrasound computed tomography (USCT) measurements. This approach fails to exploit the acoustic information in the PACT measurements and may require many USCT measurements to accurately reconstruct the sound speed. Here, we propose a joint recon-struction method where the sound speed and initial pressure distributions are simultaneously estimated from combined PACT/USCT measurements. This approach effectively overcomes the instability of the PACT joint reconstruction problem while requiring few USCT measurements.

Original languageEnglish (US)
Title of host publicationMedical Imaging 2017
Subtitle of host publicationUltrasonic Imaging and Tomography
EditorsNeb Duric, Neb Duric, Brecht Heyde
PublisherSPIE
ISBN (Electronic)9781510607231
DOIs
StatePublished - Jan 1 2017
Externally publishedYes
EventMedical Imaging 2017: Ultrasonic Imaging and Tomography - Orlando, United States
Duration: Feb 15 2017Feb 16 2017

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume10139
ISSN (Print)1605-7422

Other

OtherMedical Imaging 2017: Ultrasonic Imaging and Tomography
Country/TerritoryUnited States
CityOrlando
Period2/15/172/16/17

Keywords

  • image reconstruction
  • joint reconstruction
  • photoacoustic tomography
  • ultrasound tomography

ASJC Scopus subject areas

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

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