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specialty journal of engineering and applied science
Volume 4, 2019, Issue 3
Determining the Scattering of Ultrasound Waves Based On Weighted Entropy Analysis and Higher Order Statistics of Probability Density Function
Ehsan Sadeghian
Pages: 48-58


Ultrasound therapy can be effective in treating most injuries to the muscles and ligaments. B-mode ultrasound imaging is important because of its low cost, unsaturated radiation, time-of-use and extensive application. In some studies, Shannon entropy has been used to analyze radio frequency uncertainty (RF). Because entropy sensitivity is limited in the detection of different concentrations of dispersion, this feature can be used to find the amount of dispersion. Therefore, in this study, entropy weights is proposed as a new entropy-based approach to increase the scatter characterization function. In general, in this study, by extraction of two categories of entropy characteristics weighted and high-ranking individuals, the frequency density function of the RF amplitude of the RF signal before and after collision with the tissue, the concentration of focal beam dispersion was investigated. The magnitude of the Shannon entropy logarithm for radiation after radiation and during radiation irradiation before radiation in this study ranged from 1 to 1.1 for power of 70 and 90. 110 watts, which was modest and was almost constant for a power of 50 watts and did not make any significant changes.

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specialty journal of engineering and applied science
Issue 2, Volume 5, 2020