A Transaxial Compression Technique (TACT) for Localized Pulse-Echo Estimation of Sound Speed in Biological Tissues

J. Ophir, Y. Yazdi

Research output: Contribution to journalArticlepeer-review

Abstract

We describe a new method for the estimation of the speed of sound in soft tissues in the pulse-echo mode. A transducer imparts an accurate transaxial compression to the tissue, and the corresponding change in the arrival time of an echo feature is measured. The ratio between the compressed depth and the difference in arrival time is taken as the estimate of the speed of sound. A second, noncompressing transducer is used to correct for distal tissue movement. We show theoretically and experimentally that accurate speed of sound estimations can be made in overlying and underlying tissue mimicking layers.

Original languageEnglish (US)
Pages (from-to)35-46
Number of pages12
JournalUltrasonic Imaging
Volume12
Issue number1
DOIs
StatePublished - Jan 1990
Externally publishedYes

Keywords

  • Pulse echo
  • speed of sound
  • tissue characterization
  • tissue compression

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

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