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Low-reflection-coefficient liquid interfaces for system characterization.

T J Hall1, E L Madsen, F Dong

  • 1Department of Radiology, University of Kansas Medical Center, Kansas City, KS 66160-7234, USA. thall@kumc.edu

Ultrasound in Medicine & Biology
|July 31, 2001
PubMed
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Liquid brominated hydrocarbons create stable reflecting surfaces with water for ultrasonic system calibration. Mixtures allow fine-tuning of reflection coefficients for precise quantitative ultrasonics applications.

Area of Science:

  • Materials Science
  • Acoustics
  • Ultrasonics

Background:

  • Quantitative ultrasonics requires reliable calibration methods.
  • Accurate system characterization relies on interfaces with known acoustic properties.
  • Existing methods may lack a sufficient range of controllable reflection coefficients.

Purpose of the Study:

  • To describe the use of liquid brominated hydrocarbons for creating planar reflecting interfaces with water.
  • To establish a range of acoustic reflection coefficients for ultrasonic system calibration.
  • To investigate the temperature dependence and tunability of these reflection coefficients.

Main Methods:

  • Utilized liquid brominated hydrocarbons immiscible with water to form planar interfaces.
  • Measured acoustic reflection coefficients at temperatures between 18-24°C.

Related Experiment Videos

  • Tested both pure substances and mixtures of two brominated hydrocarbons.

    • Main Results:

    • Brominated hydrocarbon-water interfaces provide a broad range of acoustic reflection coefficients.
    • Reflection coefficients exhibited weak dependence on temperature within the tested range.
    • Mixtures allowed for the fine-tuning of reflection coefficients by adjusting weight percentages.

    Conclusions:

    • Liquid brominated hydrocarbons offer a versatile method for creating tunable acoustic reflectors.
    • These interfaces are suitable for calibrating ultrasonic imaging systems and quantitative ultrasonic applications.
    • The ability to precisely control reflection coefficients enhances the accuracy of ultrasonic measurements.