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논문 기본 정보

자료유형
학술저널
저자정보
Hyungsuk Kim (Kwangwoon University) Jaeyoon Shim (Kwangwoon University) Seo Weon Heo (Hongik University)
저널정보
대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.13 No.1
발행연도
2018.1
수록면
430 - 437 (8page)

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초록· 키워드

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Ultrasonic attenuation is an important parameter in Quantitative Ultrasound and many algorithms have been proposed to improve estimation accuracy and repeatability for multiple independent estimates. In this work, we propose an improved algorithm for estimating ultrasonic attenuation utilizing the optimal frequency compounding technique based on stochastic noise model. We formulate mathematical compounding equations in the AWGN channel model and solve optimization problems to maximize the signal-to-noise ratio for multiple frequency components. Individual estimates are calculated by the reference phantom method which provides very stable results in uniformly attenuating regions. We also propose the guideline to select frequency ranges of reflected RF signals. Simulation results using numerical phantoms show that the proposed optimal frequency compounding method provides improved accuracy while minimizing estimation bias. The estimation variance is reduced by only 16% for the un-compounding case, whereas it is reduced by 68% for the uniformly compounding case. The frequency range corresponding to the half-power for reflected signals also provides robust and efficient estimation performance.

목차

Abstract
1. Introduction
2. Theoretical Background
3. Frequency Compounding Methods
4. Results
5. Discussion
6. Conclusion
References

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UCI(KEPA) : I410-ECN-0101-2018-560-001704905