Results 161 to 170 of about 115,036 (200)

Ultrasonic Array Design and Performance

1979
Acoustical imaging obeys the fundamental laws of optics. When an object is visualized with a given system (optical or acoustical) the image obtained is the convolution of the object and the system transfer function. This is exactly what takes place when acoustical signals, reflected from a biological structure, are received by an array of transducers ...
Ph. Defranould, J. Souquet
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An Ultrasonic Wheel-Array Probe

AIP Conference Proceedings, 2004
This paper describes the development and modeling of an ultrasonic array wheel probe scanning system. The system operates at 10 MHz using a 64 element array transducer which is 50 mm in length and located in a fluid filled wheel. The wheel is coupled to the test structure dry, or with a small amount of liquid couplant. When the wheel is rolled over the
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Two-dimensional array ultrasonic transducers

The Journal of the Acoustical Society of America, 1995
A piezoelectric transducer chip comprising a plurality of transducer elements arranged in a two-dimensional array is disclosed. At least one of the transducer elements is a multi-layer element which comprises a plurality of piezoelectric layers, each of which is separated from the adjacent piezoelectric layers by an electrode layer so that a plurality ...
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Ultrasonic array

The Journal of the Acoustical Society of America, 1983
Bertram Sachs, Jacques Borburgh, Igmar Feigt   +2 more
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Transducer arrays in medical ultrasonics

The Journal of the Acoustical Society of America, 1978
Ultrasonic instrumentation based on linear and phased array transducers is increasingly being used in clinical diagnosis and yields information not hitherto available. However, the use of ultrasonic arrays is not necessarily restricted to diagnosis. They may, in the future, play an important role in therapy as well.
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Crystallographic Orientation Using Ultrasonic Arrays

2013
The anisotropic behaviour of single-crystal components significantly distorts ultrasonic images produced using an array probe, leading to unreliable inspections. Therefore, imaging algorithms must be corrected to compensate for the anisotropy. In the previous chapter, the TFM ultrasonic imaging algorithm was successfully corrected using the analytical ...
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[Ultrasonic arrays: new therapeutic developments].

Journal de radiologie, 2008
Bursts of focused ultrasound energy a billion times more intense than diagnostic ultrasound have become a non-invasive option for tumor ablation, from prostate cancer to uterine fibroid, during the last decade. Despite this progress, many issues still need to be addressed.
J-F, Aubry, M, Pernot, M, Tanter, G, Montaldo, M, Fink   +4 more
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High-Performance Flexible Microneedle Array as a Low-Impedance Surface Biopotential Dry Electrode for Wearable Electrophysiological Recording and Polysomnography

Nano-Micro Letters, 2022
Zhihong Li
exaly  

A crossbar array of magnetoresistive memory devices for in-memory computing

Nature, 2022
Seungchul Jung, Sungmeen Myung, Hyunsoo Kim   +2 more
exaly  

Measurement Models for Ultrasonic Arrays

2014
In the previous two chapters we showed how the response of a pair of send-receive array elements can be modeled in terms of two components: (1) a system function that describes all the electrical and electromechanical parts of the elements and their driving/receiving sub-systems, and (2) an acoustic/elastic transfer function that describes all the ...
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