PatentDOI
Ultrasonic doppler measurement of blood flow velocities by array transducers
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TLDR
In this article, a Doppler signal processor is provided for an ultrasonic diagnostic imaging system which identifies the peak and mean flow velocities of a sample volume within the body.Abstract:
A Doppler signal processor is provided for an ultrasonic diagnostic imaging system which identifies the peak and mean flow velocities by Doppler interrogation of a sample volume within the body. The effects of spectral broadening resulting from the use of an array transducer are compensated by producing a peak velocity value which is a function of the dimension of the array aperture and its relation to the location of the sample volume. Mean velocity values calculated from received Doppler echoes are combined with an array distortion function to produce accurate mean velocity values. The entire spectrum may be corrected by deconvolving the received signal spectrum with an array distortion function. Alternatively the effects of spectral broadening are compensated by use of Doppler reference signals for each element of the array which are a function of the position of the individual elements in the array aperture.read more
Citations
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Phased array ultrasonic inspection method for industrial applications
Thomas James Batzinger,Wei Li,Robert Snee Gilmore,Edward James Nieters,William Thomas Hatfield,Richard Eugene Klaassen,James Norman Barshinger,Bruno Hans Haider,Carl L. Chalek,Robert John Mcelligott,David Charles Franklin +10 more
TL;DR: In this article, a single-turn inspection of an ultrasonic transmission beam is performed by exciting a number of transducers forming an array to produce an ultrasound transmission beam focused into the component.
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The ultrasonic diagnostic apparatus
TL;DR: In this paper, the authors proposed an ultrasonic diagnostic device, which performs a delay processing to received signals obtained by an oscillator 9 and adds them to form a reception beam, designed in such a manner that frequencies synthesizing received signal waveform are shifted to convert waveform by multiplying a received signal from an ultrasonic probe 1 by a reference signal of the reference angle frequency, and only the frequency band of a received beam to be used is detected by limiting the frequency bands of the received beam which has been phased and added.
References
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Method and apparatus for processing signal data to form an envelope on line
TL;DR: An apparatus for generating a velocity spectrogram is described in this paper, which includes a transducer which is positionable within a vessel and receives a time-varying Doppler signal which contains information related to fluid velocity values within the vessel.
PatentDOI
Ultrasonic blood flow measuring apparatus
TL;DR: An ultrasonic blood flow measuring apparatus consisting of an ultrasonic probe for transmitting ultrasonic beam into a tissue under examination in response to an electrical driving pulse and for receiving ultrasonic echo reflected from the tissue to convert the same into an electrical signal is described in this paper.
PatentDOI
Ultrasonic type blood flow amount measuring apparatus
TL;DR: In this paper, an ultrasonic transducer is used for steering a region of interest of a subject to be measured with an ultrasonic beam and receiving echoes from that region. And the speed v of a blood flow on that line at the region of interested is calculated from the Doppler signal and thus and an amount of blood flowing through the area of interest can be evaluated from that speed and area area of the section of that blood flow.
Patent
The ultrasonic diagnostic apparatus
TL;DR: In this paper, the authors proposed an ultrasonic diagnostic device, which performs a delay processing to received signals obtained by an oscillator 9 and adds them to form a reception beam, designed in such a manner that frequencies synthesizing received signal waveform are shifted to convert waveform by multiplying a received signal from an ultrasonic probe 1 by a reference signal of the reference angle frequency, and only the frequency band of a received beam to be used is detected by limiting the frequency bands of the received beam which has been phased and added.