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Single- and double-difference algorithms for position and time-delay calibration of transducer-elements in a sparse

Yue Li1, Ian Sharp, Mark Hedley

  • 1Manuscript received June 15, 2006; accepted December 19, 2006. The authors are with the Commonwealth Scientific and Industrial Research Organisation, Information and Communication Technologies Centre, Sydney, NSW, Australia. yue.li@csiro.au

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|June 19, 2007
PubMed
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The single-difference algorithm offers superior performance for calibrating transducer elements in ultrasound imaging arrays. This method accurately determines element position and time delay, crucial for high-resolution underwater imaging.

Area of Science:

  • Acoustics
  • Signal Processing
  • Medical Imaging

Background:

  • Calibration of transducer elements is critical for high-resolution ultrasound imaging.
  • Previous work introduced a direct algorithm for position and time delay calibration, adapting global positioning system (GPS) principles.
  • Wave propagation speed was a key parameter in the initial calibration method.

Purpose of the Study:

  • Evaluate the performance of single-difference and double-difference global positioning system (GPS) algorithms for transducer calibration.
  • Integrate propagation speed calibration into these algorithms.
  • Propose a novel least-squares method for time delay calibration.

Main Methods:

  • Theoretical analysis of algorithm performance.
  • Numerical analysis and simulation studies.

Related Experiment Videos

  • Comparison of direct, single-difference, and double-difference algorithms.

    • Main Results:

    • The single-difference algorithm demonstrated the best performance among the evaluated methods.
    • Accurate calibration of transducer element position and time delay was achieved.
    • Achieved accuracy was found to be one-tenth of a wavelength.

    Conclusions:

    • The single-difference algorithm is highly effective for calibrating large, sparse arrays in underwater ultrasound imaging.
    • This method enhances the precision of position and time delay measurements for transducer elements.
    • The integrated approach improves the overall quality of high-resolution ultrasound imaging.