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Related Experiment Video

Updated: Jul 7, 2026

Construction of a Preclinical Multimodality Phantom Using Tissue-mimicking Materials for Quality Assurance in Tumor Size Measurement

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Absorption and attenuation in soft tissues. I. Calibration and error analyses.

K J Parker¹, M E Lyons

¹Dept. of Electr. Eng., Rochester Univ., NY.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|January 1, 1988

Summary

New methods improve error estimation for ultrasound absorption and attenuation measurements. Accurate peak intensity calibration using radiation force reduces uncertainty, enhancing the reliability of absorption coefficient and insertion loss data.

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Area of Science:

Ultrasound physics
Acoustic measurements
Metrology

Background:

Accurate error estimation is crucial for reliable ultrasound measurements.
Determining peak intensity in focused ultrasound beams presents significant challenges.
Existing methods for absorption and attenuation measurements have limitations in precision.

Purpose of the Study:

To develop robust error estimation techniques for ultrasound pulse decay absorption and radiation force insertion loss measurements.
To establish a precise in situ method for calibrating peak focal intensity.
To quantify uncertainties associated with these acoustic measurements.

Main Methods:

Developed an intensity calibration using radiation force measurement of total power and main lobe beam patterns.
Utilized embedded thermocouples and short ultrasound bursts for calibration.
Employed a theoretical extension of main-lobe beam patterns to estimate peak focal intensity, accounting for sidelobes.
Analyzed uncertainties in repeated radiation force insertion loss measurements.

Main Results:

Achieved in situ peak intensity estimates with typical uncertainty <5%.
Resulting absorption coefficient uncertainty is estimated at 10%.
Demonstrated that errors of <=3% are achievable for insertion loss measurements on homogeneous materials.

Conclusions:

The developed methods provide accurate error estimation for key ultrasound parameters.
The radiation force-based intensity calibration enhances measurement reliability.
The approach is suitable for precise acoustic characterization in various applications.