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Compensation for receiver bandpass effects on ultrasonic backscatter power spectra using a random medium reference
1Department of Radiology, University of Rochester Medical Center, New York 14627.
The Journal of the Acoustical Society of America
|July 1, 1988
Summary
This study presents a linear model for ultrasonic pulse-echo systems, enabling accurate characterization of scattering media. The model distinguishes media based on their unique backscatter properties within the system
Area of Science:
- Ultrasonic imaging
- Acoustic scattering
- Signal processing
Background:
- Ultrasonic pulse-echo systems are widely used for material characterization.
- Accurate modeling of system effects is crucial for interpreting scattering medium properties.
- Distinguishing between different scattering media requires robust analytical methods.
Purpose of the Study:
- To develop and validate a linear model for ultrasonic pulse-echo systems.
- To quantify the influence of system transfer functions on measured power spectra.
- To enable differentiation of scattering media based on their backscatter characteristics.
Main Methods:
- A linear model was employed to relate measured power spectra to scattering medium and system transfer functions.
- Experimental determination of transfer functions using a random medium reference.
- Normalization of measured power spectra by experimentally derived transfer functions.
Main Results:
- The developed model accurately predicts theoretical power spectra in both shape and magnitude.
- Normalized power spectra showed close agreement with theoretical predictions.
- The model successfully distinguished scattering media with differing backscatter characteristics.
Conclusions:
- The linear model effectively accounts for ultrasonic system effects in pulse-echo measurements.
- This approach allows for reliable differentiation of scattering media.
- The findings have implications for advanced ultrasonic material analysis and characterization.