High-resolution monitoring of the velocity of ultrasound in contracted and relaxed human muscle

M. Zakir Hossain*, Wolfgang Grill

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A differential detection scheme has been developed to monitor the variations of the velocity of longitudinal polarised ultrasound waves travelling in contracted and relaxed human muscle, compensating for variations of the path length by referencing to a frame. This allows to monitor in vivo changes of the velocity of ultrasound travelling in human muscle with so far not reported resolution. To achieve this, the monitored muscle is placed into a rigid enclosure to minimise deformations under contraction. Detected is a maximum increase in the speed of ultrasound from 1 to 3.7 MHz of only (0.6 ± 0.05)% under contraction. Results are compared to modelling based on well-established rather elementary assumptions for idealised liquids and soft mater and to features derived from related published observations and assumptions. Knowledge on variations of the velocity of ultrasonic waves as demonstrated here is important for image reconstruction in ultrasonic imaging and for modelling of the mechanical properties of muscles, since Young's modulus and the shear modulus, both determining furthermore Poisson's number, representing together the mechanical properties of homogeneous matter can all be derived from the measured data.

Original languageEnglish
Pages (from-to)414-419
Number of pages6
JournalComputer Methods in Biomechanics and Biomedical Engineering: Imaging and Visualization
Volume7
Issue number4
DOIs
Publication statusPublished - Jul 4 2019

Keywords

  • ultrasonic monitoring of human muscle
  • velocity of ultrasound in contracted muscle
  • Velocity of ultrasound in muscle

ASJC Scopus subject areas

  • Computational Mechanics
  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging
  • Computer Science Applications

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