Correction of refraction and other angle errors in beam tracking speed of sound estimations using multiple tracking transducers

D. P. Shattuck, J. Ophir, G. W. Johnson, Y. Yazdi, D. Mehta

Research output: Contribution to journalArticlepeer-review

Abstract

The beam tracking approach to the estimation of the speed of sound has shown potential for making unbiased estimates in tissues. The speed of sound in a medium can be found from the arrival times of echoes as a function of the position of a tracking transducer. There is a problem in this approach if the angle between the direction of tracked beam and the direction of tracking translation is not zero due to refraction or other effects. An angle error as small as 1° would result in an error that is too large for diagnostic applications. A modified technique using three or more tracking transducers is described. This yields a corrected speed of sound estimate, and calculates the angle error. A simulation program has shown that this modified technique could indeed correct for the angle errors.

Original languageEnglish (US)
Pages (from-to)673-681
Number of pages9
JournalUltrasound in Medicine and Biology
Volume15
Issue number7
DOIs
StatePublished - 1989
Externally publishedYes

Keywords

  • Angle errors
  • Beam tracking
  • Pulse echo
  • Refraction
  • Speed of sound

ASJC Scopus subject areas

  • Biophysics
  • Radiological and Ultrasound Technology
  • Acoustics and Ultrasonics

Fingerprint Dive into the research topics of 'Correction of refraction and other angle errors in beam tracking speed of sound estimations using multiple tracking transducers'. Together they form a unique fingerprint.

Cite this