Simple device for determining an index of echogenicity.

Area of Science:

• Medical Imaging
• Biophysics
• Acoustics

Background:

• Echogenicity quantification is crucial for accurate ultrasound diagnostics.
• Standard manual echographs lack objective numerical echogenicity indices.
• Tissue characterization relies on understanding acoustic properties like attenuation and backscattering.

Purpose of the Study:

• To develop and validate a simple electronic system for a manual echograph to obtain a numerical index of echogenicity.
• To theoretically analyze the factors influencing the echogenicity index.
• To assess the feasibility of measuring tissue attenuation and the reproducibility of the index.

Main Methods:

• A simple electronic system was adapted to a standard manual echograph.
• An echogenicity index was calculated as the ratio of echo amplitudes in tissue versus a tissue-mimicking phantom.
• Theoretical analysis explored the index's dependence on attenuation, backscattering, and depth.
• The system's ability to measure attenuation and the index's reproducibility were evaluated on normal thyroid tissue.

Main Results:

• A numerical index of echogenicity was successfully obtained using the adapted echograph system.
• Theoretical analysis confirmed the index's dependence on tissue attenuation, backscattering, and measurement depth.
• Feasibility of measuring the attenuation coefficient with the system was demonstrated.
• The echogenicity index measurement showed good reproducibility in normal thyroid tissue.

Conclusions:

• The developed system provides a simple and adaptable method for obtaining a numerical echogenicity index with manual echographs.
• The index is influenced by fundamental tissue acoustic properties and measurement depth, offering insights into tissue characterization.
• The system demonstrates potential for objective and reproducible ultrasound-based tissue analysis, including attenuation coefficient measurement.