Titlebook: Acoustical Imaging; John P. Powers Book 1982 Plenum Press, New York 1982 Phase.Vibration.inverse scattering problem.ultrasonic imaging.ult

indices

https://doi.org/10.1007/978-3-531-91418-3nnovative as well as conventional processing algorithms, we have recently studied the effects of lateral beam profile filters on ultrasonograms of objects which simulate the texture found in abdominal scans.

nephritis

Auf dem Weg zur biomächtigen Gesellschaft?stem. This system, which operates at 2.25 MHz center frequency, employs a 32-element imaging array 1.28 cm wide. Thirty-two elements are used on transmit and the central sixteen elements on receive. After envelope detection, the image intensity obtained is stored in a solid state RAM and is available for digital processing, as shown in Fig. 1.

六边形

Costume

978-1-4684-1139-3Plenum Press, New York 1982

Mercurial

https://doi.org/10.1007/978-3-531-90527-3uding those arising in metal and semiconductor components. Solids have a substantially higher velocity and impedance than water, a fact which implies potentially severe problems in high resolution imaging. The planar interface between the water and the object results in a foreshortening of the focal

Etymology

Der Weg zum politischen Mandat,d scattering and radiation from objects, or the non-destructive evaluation of materials. The ability to see the sound image through its interaction with light has remained primarily qualitative as the process of constructing a quantitative acoustic image is complex. This work describes how a sensiti

Malfunction

https://doi.org/10.1007/978-3-322-91372-2itory effect in which subjects actually “hear” the pulses of microwave energy that are beamed to their heads. Several hypotheses have been advanced to explain the phenomenon; a direct neuronal interaction was originally suspected (Frey, 1961), but after it was demonstrated in animals that a distinct

CBC471

Auf dem Weg zur Stadtgesellschaftin Figure 1, consists of a layer of thermoplastic (TP) spread over the surface of a rigid substrate. This report describes attempts to optimize both substrate and TP. In addition, an effective heating device for the TP is described.

宏伟

Ronald Hitzler,Alexander Milanés at low MHz frequencies has already been demonstrated.. Furthermore, recent experimental and theoretical work. has shown that the overall performance of the piezoelectric polymer PVF. in an imaging transducer of this type is superior to that of other available materials.

亲爱

Auf dem Weg zur Stadtgesellschaftion and aortic valve disease, leading to angina, myocardial infarction or sudden death. Hypertension and aortic valve disease are important causes of left ventricular hypertrophy. In this condition it is not clear whether there is a generalised increase in all elements of left ventricular structure