감쇠 계수 추출을 위한 초음파 신호 분석 연구 - Homomorphic Process와 수정된 spectral difference방법을 사용하여 얻은 실리콘 팬텀의 감쇠 계수 안정성에 관한 연구 - = The Study on the Ultrasound Signal Processing for Estimating the Attenuation Coefficient - The study on the stability of the attenuation coefficient in silicon-made phantom using both homomorphic process and the modified spectral difference method -

다국어 초록 (Multilingual Abstract)

In the study on the quantitative diagnosis using ultrasound, the stability and precision of tissue characterized parameters are important for the clinical application. We estimate attenuation coefficient introducing homomorphlc process Into the modified spectral differnce method about silicon-madu phantom. We compare the results with those estimated uslng the method used for obtaining the attenuation map image before. Homomorphic process has the effect smoothing the reflected echo signal spectrum, therefore eliminat os the random pattern of the signal spectrum generated by the scatterers. As a result, it Is shown that the stability is enhanced