Hyungsuk E. Kim

Learn More
Attenuation estimation methods for medical ultrasound are important because attenuation properties of soft tissue can be used to distinguish between benign and malignant tumors and to detect diffuse disease. The classical spectral shift method and the spectral difference method are the most commonly used methods for the estimation of the attenuation;(More)
Estimation of the local attenuation coefficient in soft tissue is important both for clinical diagnosis and for further analysis of ultrasound B-mode images. However, it is difficult to extract spectral properties in a small region of interest from noisy backscattered ultrasound radio frequency (RF) signals. Diffraction effects due to transducer beam focal(More)
A problem with video signal analysis for estimating frequency-dependent ultrasonic attenuation is that relative echogenicity versus depth curves are distorted when broadband pulses are used. In this correspondence, we present results that demonstrate improved accuracy of attenuation estimates computed from B-mode or envelope data derived after narrowband (1(More)
In this study, we combined the Cambodian socioeconomic survey for 1997 and the country’s population census of 1998 to produce poverty measures at the commune-level in Cambodia using the small-area estimation technique developed by Elbers, Lanjouw and Lanjouw. While there are a number of communes for which the standard errors associated with the estimates(More)
Frequency-dependent ultrasound attenuation in soft tissue is an important parameter for discriminating normal from diseased tissues. A previously described video signal analysis method computes the ratio of mean echo intensities from a sample to that from a reference phantom scanned using identical transducer settings. The relative echogenicity versus depth(More)
Ultrasound attenuation measurements in soft tissue is important both for the clinical diagnosis of various pathological conditions as well as for further analysis of ultrasound B-mode images artifacts such as shadowing and enhancement. In this paper, we present a new method for estimating local attenuation coefficients using spectral cross-correlation(More)
This paper discusses a non-destructive evaluation (NDE) technique for the detection of damage in composite aircraft structures following high energy wide area blunt impact (HEWABI) from ground service equipment (GSE), such as heavy cargo loaders and other heavy equipment. The test structures typically include skin, co-cured stringers, and C-frames that are(More)
  • 1