Structure function: Theory, ultrasonic measurement, and histology

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

Abstract

Ultrasonic scattering is determined by not only the properties of individual scatterers, but also the correlation among scatterer positions. The role of scatterer spatial correlation is significant for dense medium, but has not been fully understood. The effect of scatterer spatial correlation may be modeled by a structure function (three-dimensional Fourier transform of the scatterer positions) as a frequency-dependent factor in the backscatter coefficient (BSC) expression. To study the structure function, we have performed three steps: 1) we developed theoretical structure function models that take into account the polydispersity of spherical scatterers; 2) we developed the cell pellet biophantom technique to estimate the structure function from ultrasound backscattered data (11 - 105 MHz); 3) we developed algorithms for estimating the structure function from histology, independent of the acoustic measurements. The acoustically estimated and histologically estimated structure functions show consistent frequency dependency, which demonstrates the correlation between acoustically estimated structure function and scatterer position distribution observed in histology. Furthermore, fitting the theoretical polydisperse structure function model to the experimental structure functions yielded relatively accurate cell radius estimates (error < 16%). Our results suggest that the structure function is required for accurately modeling the acoustic scattering in dense medium.

Original languageEnglish (US)
Title of host publication2015 IEEE International Ultrasonics Symposium, IUS 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479981823
DOIs
StatePublished - Nov 13 2015
EventIEEE International Ultrasonics Symposium, IUS 2015 - Taipei, Taiwan, Province of China
Duration: Oct 21 2015Oct 24 2015

Publication series

Name2015 IEEE International Ultrasonics Symposium, IUS 2015

Other

OtherIEEE International Ultrasonics Symposium, IUS 2015
CountryTaiwan, Province of China
CityTaipei
Period10/21/1510/24/15

Keywords

  • acoustic scattering
  • dense medium
  • histology
  • quantitative ultrasound
  • Structure function

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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