Development of Medical Ultrasound Imaging Techniques for Tissue Characterization (The Correction Method of Diffraction Effect in Measurements of Attenuation Coefficient)

조직 정량화를 위한 의용 초음파 영상 기술 개발(감쇠계수 측정에서 회질 영향의 보정법)

In this paper, we consider the effect of diffraction due to the finite-sized aperture and propose the new correction method of errors in measurements of attenuation coefficient owing to the diffraction effect. In the existing correction method, we obtained the attenuation coefficient after correct the spectrum at each depth. However, this paper obtain the attenuation coefficient using lg-spectral difference approach and then correct errors. As a proposed method is not correction for the spectrum at each depth but the difference spectrum, we reduce the calculation. Also the correction is performed through the total frequency range, the accurate attenuation coefficient in whole bandwidth is produced.