Photoacoustic image reconstruction quality enhancement based on optimum focusing by calculating mean acoustic sound-speed

Bing Cong, Kengo Kondo, Makoto Yamakawa, Tsuyoshi Shiina

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

2 Citations (Scopus)

Abstract

A constant sound speed of 1540 m/s is generally used in various photoacoustic image reconstruction algorithms, based on the assumption of homogeneous sound speed in human tissue. However, the variations of sound speeds in human tissue can be as great as 10%, which can lead to distortion and blurring in the reconstruction images. To enhance the reconstructed photoacoustic image quality, an automatically selected the mean sound speed based on optimum focusing of detected photoacoustic signals is proposed. The optimum focusing is quantified by calculating the minimum average sum of the deviation of focused photoacoustic signals from the mean with various sound speeds. The method is demonstrated using homogeneous and heterogeneous sound speed numerical simulation models. The central vertical and lateral profiles of reconstructed images verify the performance of the proposed method.

Original languageEnglish
Title of host publicationIEEE International Ultrasonics Symposium, IUS
PublisherIEEE Computer Society
Pages1368-1371
Number of pages4
ISBN (Electronic)9781479970490
DOIs
Publication statusPublished - 2014 Oct 20
Externally publishedYes
Event2014 IEEE International Ultrasonics Symposium, IUS 2014 - Chicago, United States
Duration: 2014 Sep 32014 Sep 6

Publication series

NameIEEE International Ultrasonics Symposium, IUS
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Conference

Conference2014 IEEE International Ultrasonics Symposium, IUS 2014
Country/TerritoryUnited States
CityChicago
Period14/9/314/9/6

Keywords

  • image reconstruction
  • mean sound-speed estimation
  • optimum focusing
  • photoacoustic imaging

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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