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Related Experiment Videos

A programmable Doppler string test object

S V Russell1, D McHugh, B R Moreman

  • 1North Western Medical Physics Department, Christie Hospital NHS Trust, Withington, Manchester, UK.

Physics in Medicine and Biology
|November 1, 1993
PubMed
Summary
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A new water-filled ultrasound phantom with a moving string provides reproducible Doppler waveforms for testing ultrasound systems. This portable device aids in field checks and comparisons of Doppler ultrasound performance.

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Diagnostic Ultrasound

Background:

  • Doppler ultrasound systems require regular performance verification.
  • Existing test objects may not fully replicate in vivo conditions or offer portability.
  • Accurate assessment of Doppler parameters is crucial for reliable diagnostics.

Purpose of the Study:

  • To introduce a novel, water-filled ultrasound string test object for Doppler systems.
  • To evaluate the performance and reproducibility of this test object.
  • To assess its suitability for field use and inter-machine comparisons.

Main Methods:

  • Development of a prototype water-filled test object with a computer-controlled stepper motor.
  • Generation of programmable Doppler waveforms simulating physiological conditions.

Related Experiment Videos

  • Testing the object on five different duplex and color Doppler ultrasound scanners.
  • Evaluation of Doppler calculation parameters (e.g., pulsatility index, resistance index), range gate registration, and wall filter function.

    • Main Results:

    • The test object generated realistic and reproducible Doppler waveforms.
    • It successfully allowed for the assessment of key Doppler parameters and system functions.
    • A lack of attenuation in the water-filled design was noted as a potential issue for some systems.
    • The object demonstrated sufficient reproducibility for field testing across multiple scanners.

    Conclusions:

    • The developed ultrasound string test object is a compact and portable tool for Doppler system performance evaluation.
    • It offers a reproducible method for checking Doppler parameters and system functions in the field.
    • Further refinement may be needed to address attenuation issues on specific ultrasound systems.