Wszystkie pola: soft tissues - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Statistical properties of wavelet transform coefficients of backscattering signal from soft tissues and their phantoms
Autorzy:: Gambin, B.
Doubrovina, O.
Powiązania:: https://bibliotekanauki.pl/articles/331908.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Akustyczne
Opis:: The paper contains the wavelet approach to registered backscattered RF signals from two different cases. First, the wavelet analysis has been performed for RF signals registered from soft tissue phantoms. The second case is the wavelet analyses of RF scattered signals from regions of healthy and BCC changed human skin. The three phantoms made from tissuemimicking material with different structures have been measured. We claim that there are visible differences in the statistical parameters of wavelets coefficients of signals between healthy and BCC changed skin regions as well as between phantoms without scatterers and with different number of strong small scatterers.
Źródło:: Hydroacoustics; 2013, 16; 59-66
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Possible temperature increases in soft tissues in the case of nonlinear and linear wave propagation
Autorzy:: Filipczyński, L.
Kujawska, T.
Tymkiewicz, R.
Wójcik, J.
Powiązania:: https://bibliotekanauki.pl/articles/332225.pdf
Data publikacji:: 1997
Wydawca:: Polskie Towarzystwo Akustyczne
Opis:: It is well known that the nonlinear propagation increases the absorption of acoustic waves in the medium thus increasing the temperature effects. According to the recently developed new theoretical approach it is possible to determine in a simple way the effective absorption in the case of nonlinear propagation basing on the pulse spectrum analysis [Wójcik, 1996]. In this way it was possible to find the corresponding absorption values occuring in ultrasonography. In this case a classical PVDF membrane hydrophone was used to demonstrate and to measure nonlinear effects. Analysing the obtained wave spectra it was possible to determine the increase of the effective tissue absorption and hence to find the rate of heat generation per unit volume which is crucial for temperature elevations In this way possible temperature increases for the case of nonlinear and linear propagation can be determined.
Źródło:: Hydroacoustics; 1997, 1; 329-332
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

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