Titlebook: Ultrasound Interactions in Biology and Medicine; R. Millner (Chairman),E. Rosenfeld,U. Cobet Book 1983 Plenum Press, New York 1983 biophys

ARCHE

Tissue Characterization by Ultrasonic Pulse Spectroscopy,chniques used the information from reflected and backscattered signals of pulsed ultrasonic waves. But more comprehensive signal processing allowed us to get more accurate information concerning tissue structures. These new attempts use techniques, e.g. impedography, time of flight tomography, compu

CUB

Study of Ultrasonic Topography of the Kidney,the progress made in ultrasonic imaging in medical diagnostics. The possibility of obtaining ultrasonic images of biological substances is based on the acoustic heterogeneity of these structures. That is why the investigation of the acoustic topography of tissue, i.e. the spatial distribution of vel

Congregate

Soft Tissue Simulation in Ultrasonic Diagnosis Using Cross-Linked Hydrophobic Gels,es such as the complex plane wave moduli M. = K. + 4/3 G., where K. and G. are the complex bulk and shear moduli respectively(l). In an attempt to identify suitable tissue equivalent (TE) materials, an initial study of ultrasonic wave propagation speed, and attenuation frequency power dependence, wa

indicate

Ultrasonic Backscattering by Blood,aminations of relatively small vessels in the peripheral blood circulations. There are difficulties in the measuring of quantitative blood flow volume because an exact knowledge is necessary of the ultrasound scattering in blood by using continuous waves. Also, for the estimation of the mean velocit

策略

AIL

Cavitation Thresholds in Biological Tissues,ultrasound. In the megacycle range of ultrasound frequencies cavitation in viscous — from 0.25 to 1.0 P — biological media was for a long time supposed to arise only at sufficiently high intensities of ultrasound., (of the order of 10–100 W/cm.).

革新

defeatist

Numerical Calculation of Nearfield Pressure Variations of Different Annular Ring Transducers,ution of this equation is called the impulse-response-function (IRF). The IRF of a circular piston source is known, and the soundfields of circular piston and circular ring transducers were computed. Also the diffraction loss curves of these transducers were calculated..

舰旗

lambaste

F. Holzer,P. Wach course, far too complex for the study of population genetics to be simply a branch of applied mathematics, so that while we are concerned here with the mathematical theory, I have tried to indicate which of our results should continue to apply in a context wider than that in which they are formally