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Attenuation coefficient estimates of mouse and rat chest wall
G A Teotico1, R J Miller, L A Frizzell
1Bioacoustics Research Laboratory, Department of Electrical and Computer Engineering, University of Illinois, Urbana, IL 61801, USA.
Summary
The attenuation coefficients of intercostal tissues in mice and rats were measured postmortem. Storage time did not affect the estimated attenuation coefficient, which was 1.1 dB/cm-MHz for both species.
Area of Science:
- Biomedical Engineering
- Medical Physics
- Comparative Anatomy
Background:
- Accurate attenuation coefficient measurements are crucial for medical imaging.
- Intercostal tissues represent a significant component of the chest wall.
- Understanding tissue properties postmortem is vital for research and calibration.
Purpose of the Study:
- To estimate the frequency-normalized attenuation coefficients of intercostal tissues in mice and rats.
- To investigate the impact of postmortem storage time on these attenuation coefficients.
Main Methods:
- Postmortem chest walls from female ICR mice and Sprague-Dawley rats were used.
- Attenuation coefficients were measured from skin to parietal pleura.
- Tissue samples were stored at different temperatures and evaluated at various postmortem time points.
Main Results:
- The estimated frequency-normalized attenuation coefficient for both mouse and rat intercostal tissues was 1.1 dB/cm-MHz.
- No statistically significant difference was found in attenuation coefficients based on postmortem storage duration.
Conclusions:
- Postmortem storage time, within the tested ranges, does not significantly alter the attenuation coefficient of intercostal tissues in mice and rats.
- These findings support the reliability of using postmortem tissues for attenuation coefficient studies.
