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Estimating the ultrasound attenuation coefficient using complementary Golay codes.

Ihor Trots¹, Yuriy Tasinkevych¹, Jerzy Litniewski¹

¹Institute of Fundamental Technological Research, Polish Academy of Sciences, Institute of Fundamental Technological Research, Pawinskiego Str. 5B, 02-106 Warsaw, Poland.

|January 18, 2020

Summary

Complementary Golay coded sequences (CGCS) improve ultrasound attenuation measurements in tissue-like materials. This method enhances accuracy, especially at greater depths and higher attenuation, aiding medical diagnostics.

Keywords:

Attenuation Coded excitation Golay sequences Ultrasound imaging

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Area of Science:

Medical imaging
Ultrasound physics
Biomedical engineering

Background:

Accurate ultrasound attenuation evaluation is crucial for medical applications.
Tissue attenuation significantly impacts ultrasound signal penetration and diagnostic accuracy.
Current methods face limitations at greater depths and high attenuation levels.

Purpose of the Study:

To analyze the effectiveness of complementary Golay coded sequences (CGCS) for ultrasound attenuation measurement.
To compare CGCS with short sine pulse excitation in tissue-like materials.
To assess the impact of CGCS on measurement accuracy at various depths and attenuation levels.

Main Methods:

Simulations of ultrasound backscattered from media with predefined attenuation (0.3, 0.7, 2 dB/[MHz×cm]).
Experimental measurements of ultrasound echoes scattered in a tissue phantom (0.5 dB/[MHz×cm]).
Comparison of attenuation measurements using CGCS and short two sine cycles pulse excitation.

Main Results:

CGCS excitation increased the maximum depth for accurate attenuation determination from 55mm to 80mm (0.7 dB/[MHz×cm]) and 20mm to 50mm (2 dB/[MHz×cm]) in simulations.
Relative error in attenuation estimation decreased from 6% and 16% (sine pulse) to 2% and 4% (CGCS) at 10mm and 40mm depths in phantom measurements.
CGCS significantly improved measurement accuracy compared to the short sine pulse.

Conclusions:

Complementary Golay coded sequences enhance the accuracy of ultrasound attenuation measurements.
CGCS are particularly effective at greater depths and higher attenuation levels.
The use of CGCS can improve the reliability of medical diagnostic techniques utilizing ultrasound.