PatentDOI
Ultrasonic diagnosis apparatus for tissue characterization
o Fujitsu Limited Igarashi,Keiichi C O Fujitsu L Murakami,Yutaka Igarashi,Akira Shiba,Hajime C O Fujitsu Lim Hayashi,Hirohide Miwa,Michitoshi C O Fujitsu L Inoue,Masayuki C O Fujitsu Matsumoto +7 more
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TLDR
In this article, a diagnosis apparatus for discriminating a property of the tissue to be observed from the reflected ultrasonic wave using the nature of the fine structure of tissue, and more practically uses the interval of small reflecting bodies dispersely distributed in the tissue as the parameters.Abstract:
A diagnosis apparatus for discriminating a property of the tissue to be observed from the reflected ultrasonic wave uses the nature of the fine structure of the tissue, and more practically uses the interval of small reflecting bodies dispersely distributed in the tissue as the parameters. The intervals flucatuate. Therefore, an average value and/or a degree of fluctuation is calculated and is displayed. For obtaining the average interval, a method of using the cepstrum of the received signal or a method of using the self-correlation of the received signal can be used.read more
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PatentDOI
Ultrasonic tissue characterization
TL;DR: In this paper, a statistical analysis is employed to estimate the scatterer number density (SND) of tissues, which incorporates measurements of both the statistical moments of the backscattered signals and the point spread function of the acoustic system.
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TL;DR: In this article, the use of a chelating agent with an ultrasonic device for the treatment of hair and other fibers is described, which includes an ultrasound generator, a comb device responsive to the generated ultrasonic waves, a reflector for reflecting the incident ultrasonic wave disposed on the distal end of the comb device, and a chelation agent preferably disposed within the treatment device.
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TL;DR: In this paper, a method of determining in vivo an estimate of the modulus of elasticity of a bone is presented, which includes the steps of applying an ultrasound beam to a limb from a transmitting transducer to a receiving transducers, and then measuring the flight times, Ts for the first path through the cortex of the bone, and Tm along a second path along the cortex and medulla of said bone.
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Journal ArticleDOI
The cepstrum: A guide to processing
TL;DR: The power, complex, and phase cepstra are shown to be easily related to one another, and the interpretation and processing of data in such areas as speech, seismology, and hydroacoustics is discussed.
Journal ArticleDOI
Ultrasonic attenuation tomography of soft tissues.
K. A. Dines,Avinash C. Kak +1 more
TL;DR: In this article, it was shown that the attenuation information is derived from frequency shifts rather than the signal amplitudes, which is somewhat insensitive to a partial loss of signal caused by beam refraction.
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Biometric measuring device
Louis Katz,Werner Gruenebaum +1 more
TL;DR: In this article, a biometric measuring device measures distances between selected elements in a human body, and in particular the human eye, and display means displays this distance signal as a number.
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Autocorrelation apparatus and method for approximating the occurrence of a generally periodic but unknown signal
Rudiger Witt,Courtin Erich +1 more
TL;DR: In this article, a method and an apparatus for indicating in real time the occurrence of and measuring the frequency or period of the basic oscillation of a generally periodic unknown signal with statistically distributed spectral components is disclosed.
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Method and means for detecting a periodic wave structure
TL;DR: In this paper, the periodicity of a wave structure is determined by detecting a temporal feature such as zero crossings of the wave, measuring time intervals between zero crossings, and developing a histogram of the time intervals.