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KMID : 0372919840050010055
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Journal of Biomedical Engineering Research
1984 Volume.5 No. 1 p.55 ~ p.62
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Ultrasonic Tissue Characterization by Digital Spectrum Analysis Technique
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곽철은
민병구/이중웅/최병인/김주완
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Abstract
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A digital spectrum analysis technique was used to estimate the tissue characteristic parameters (transmission velocity and attenuation coefficient) in the phantom study and the human liver’’’’s ultrasound scanning. The soft tissue equivalent phantom was made with the combination materials of agar, water, powdered graphite, and n-propyl alcohol. In the human study, twenty five normal subjects and three patients with liver diseases were studied using the ultrasonic reflection signals and the spectrum analysis method The following results were obtained; 1. The soft tissue-equivalent materical could be produced with various acoustic parameters by changing the composition amount of the powdered graphite and n-propyl alcohol. 2. Attenuation coefficients of normal human liver tissue were estimated to be 0. 36 dB/cm MHz±0.11. In patients with liver disese, tile attenuation coefficients were shown to be different from the above normal values.
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KEYWORD
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