Book ChapterDOI
Inverse Filtering to Minimize the Effect of Mechanical Aberration in Focusing Piezoelectric Transducers
Mostafa Mortezaie,Glen Wade +1 more
- pp 235-248
TLDR
In this paper, a spatial focusing electrode pattern, such as a Fresnel zone plate, is used to excite the piezoelectric transducer of a positively scanning transmitter.Abstract:
The resolution of acoustic images from a “positively scanning transmitter” system is limited by the size of the focal spot of the acoustic beam. Frequently a spatial focusing electrode pattern, such as a Fresnel zone plate, is used to excite the piezoelectric transducer of such a system. However, the transformation of that electrode pattern to the acoustic pattern actually generated is not exact. This effect, called mechanical aberration, is a result of wave generation and propagation in the piezoelectric plate and can be represented by a spatial transfer function. The aberration enlarges the focal spot and decreases the resolving power of the instrument.read more
References
More filters
Journal ArticleDOI
Acoustic Fresnel zone plate transducers
S. A. Farnow,B. A. Auld +1 more
TL;DR: Experimental focal plane intensity distributions are presented for a 10-zone acoustic zone plate operating at approximately 10 MHz in this article, where the results are related to the spatial frequency response of the transducer.
Journal ArticleDOI
Spatial response of arbitrarily electroded piezoelectric plates by plane-wave decomposition
TL;DR: A new technique is presented for determining the spatial distribution of the acoustic output of an arbitrarily electroded piezo-electric plate with electrode pattern considered as the input and the resulting acoustic particle displacement pattern immediately in front of the transducer in the propagation medium as the output.
Journal ArticleDOI
Regular articleSpatial response of arbitrarily electroded piezoelectric plates by plane-wave decomposition
TL;DR: In this paper, the spatial distribution of the acoustic output of an arbitrarily electroded piezo-electric plate is determined by considering the transduced as a linear spatial system, with the electrode pattern considered as the input and the resulting acoustic particle displacement pattern immediately in front of the transducers in the propagation medium as the output.
Journal ArticleDOI
A high-sensitivity real-time acoustic imaging system for biomedical diagnosis
TL;DR: In this article, a real-time acoustic imaging system which is essentially the acoustic equivalent of the scanning electron-beam microscope is proposed, which is superior in theoretical performance to all the presently existing systems.
Related Papers (5)
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