Results 301 to 310 of about 250,186 (352)
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Ultrasonic probe, ultrasonic imaging apparatus and ultrasonic imaging method
The Journal of the Acoustical Society of America, 2007An ultrasonic probe is disclosed for reducing the influence of electromagnetic wave leakage to a magnetic resonance imaging (MRI) device even when the probe is inside the MRI gantry. The ultrasonic probe includes a piezoelectric material, an acoustic matching layer provided on the ultrasonic radiation side of the piezoelectric material, and backing ...
Takashi Azuma, Shinichiro Umemura
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The Journal of the Acoustical Society of America, 2012
A ultrasonic transducer of the invention comprises: a transducer cell including a first electrode and a second electrode disposed separated from the first electrode by an air gap portion; and an electret for applying a potential difference between the first electrode and the second electrode.
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A ultrasonic transducer of the invention comprises: a transducer cell including a first electrode and a second electrode disposed separated from the first electrode by an air gap portion; and an electret for applying a potential difference between the first electrode and the second electrode.
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Ultrasonic scatterer, ultrasonic imaging method and ultrasonic imaging apparatus
The Journal of the Acoustical Society of America, 2008The ultrasonic scatterer of the invention comprises gas-containing particles having an average particle size of 0.01 μm to 10 μm, the ultrasonic imaging method of the invention comprises transmitting an ultrasonic wave continuing for ten cycles or more; transmitting an ultrasonic wave continuing for four cycles or more and less than ten cycles after a ...
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2006
The field of ultrasonic is still making strides towards perfection, but already many applications of ultrasonic energy have been found in science and technology. Ultrasonics is the science of sound waves above the limits of human audibility. This article is describing the theory of ultrasonics, how ultrasonic technology is applied to precision cleaning
DURAN, Kerim +4 more
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The field of ultrasonic is still making strides towards perfection, but already many applications of ultrasonic energy have been found in science and technology. Ultrasonics is the science of sound waves above the limits of human audibility. This article is describing the theory of ultrasonics, how ultrasonic technology is applied to precision cleaning
DURAN, Kerim +4 more
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Transactions of the Institute of Measurement and Control, 1979
Recent accounts of ultrasonic flowmeters usually concentrate on either transit time or Doppler types. Although these are the most common types in use today, at least six other types exist. Part 1 of this two-part paper describes the physical principles of eight types of ultrasonic flowmeters, along with some general considerations (flow profile ...
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Recent accounts of ultrasonic flowmeters usually concentrate on either transit time or Doppler types. Although these are the most common types in use today, at least six other types exist. Part 1 of this two-part paper describes the physical principles of eight types of ultrasonic flowmeters, along with some general considerations (flow profile ...
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Electronics and Power, 1963
Ultrasonics has been used in medicine for about a decade. Progress in the subject is reviewed and discussed, particular stress being laid on physical aspects. The physics of ultrasonic fields, and their production and measurement, are briefly described. The main part of the review gives a critical description of the use of high intensity ultrasound for
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Ultrasonics has been used in medicine for about a decade. Progress in the subject is reviewed and discussed, particular stress being laid on physical aspects. The physics of ultrasonic fields, and their production and measurement, are briefly described. The main part of the review gives a critical description of the use of high intensity ultrasound for
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Ultrasonic probe and ultrasonic diagnosing system using ultrasonic probe
The Journal of the Acoustical Society of America, 1995An ultrasonic diagnosing system includes a probe having an vibrator made of a plurality of spaced piezoelectric; material elements arranged in a matrix, first electrodes arranged on one surface of the vibrator in an array of rows parallel to each other, and second electrodes arranged on another surface of the vibrator in an array of rows parallel to ...
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The Journal of Prosthetic Dentistry, 1956
PPROXIMATELY ONE HUNDRED YEARS ago, it was learned that certain crystal A elements contracted in a magnetic field. Shortly thereafter a similar property was discovered in certain metals which, if rod-shaped, contracted in the direction of their long axes.
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PPROXIMATELY ONE HUNDRED YEARS ago, it was learned that certain crystal A elements contracted in a magnetic field. Shortly thereafter a similar property was discovered in certain metals which, if rod-shaped, contracted in the direction of their long axes.
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