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| Number | Title | Issue Date |
| 4966151 | Ultrasonic diagnostic apparatus In an ultrasonic diagnostic apparatus of this invention, the dimension of a sample volume can be adjusted both in the depth and azimuth directions in forming a transmission beam for both a B mode and a Doppler mode with the use of a common beam forming da... | 10/30/1990 |
| 4961427 | Ultrasonic doppler diagnostic apparatus An ultrasonic Doppler diagnostic apparatus which transmits an ultrasonic wave into a subject under observation, detects the velocity of movement of a moving reflective member such as blood flow within the heart or a coronary artery of the subject, and dis... | 10/09/1990 |
| 4955386 | Pulse doppler flow speed meter A pulse doppler apparatus transmits a ultrasonic sound wave at transmission intervals T and T+Ts alternately and iteratively, detects the phase difference attributable to the doppler shift in the reflected sound wave signal at the interval T and the phase... | 09/11/1990 |
| 4934373 | Method and apparatus for synthesizing a continuous estimate signal from segments of a Gaussian signal provided by ultra sonic doppler measurement on a fluid flow Method and apparatus for synthesizing a continuous estimate signal of a Gaussian signal resulting from ultrasonic Doppler measurement on a fluid flow, from existing segments of the Gaussian signal. The segment signals are first stored and there is at the ... | 06/19/1990 |
| 4932415 | Method of color coding two dimensional ulltrasonic doppler velocity images of blood flow on a display A pulsed ultrasonic beam is swept over an image field and the backscattered signal is sampled for a multiplicity of timelags to obtain signals from a multiplicity of depths along the beam, the signals forming a two-dimensional set of range cells. A combin... | 06/12/1990 |
| 4930513 | Two dimensional processing of pulsed Doppler signals A processor for pulsed Doppler velocity measurement utilizes a two dimensional discrete Fourier transform to map wideband signals into a frequency space where constant velocity Doppler spectral components are represented as radial lines. A radial projecti... | 06/05/1990 |
| 4930514 | Ultrasonic imaging apparatus An ultrasonic imaging apparatus comprises an ultrasonic transducer for emitting ultrasonic pulses at a rate frequency fr and converting an echo wave of the ultrasonic pulses into an echo signal, an orthogonal detector circuit for orthogonally detecting an... | 06/05/1990 |
| 4928698 | Device for measuring the speed of moving organs and blood flows by correlation A device for measuring the speed of moving organs and blood flows, comprising an intercorrelation circuit (100) which supplies on the basis of two successive shifted echographic lines, 2I+1 correlation function values, and a multiplex/interpolation circui... | 05/29/1990 |
| 4918605 | Method and system for detecting and processing ultrasonic doppler signals The ultrasonic beam is transmitted a plurality of times in the same direction. The echo signals from an object under examination are detected by a plurality of receiving delay circuits. The raster signals used for ultrasonic tomogram contain two direction... | 04/17/1990 |
| 4911171 | Ultrasonic blood flow imaging apparatus An ultrasonic blood flow imaging apparatus includes transmitter/receiver for transmitting drive pulses to an ultrasonic transducer, and receiving and converting an echo signal from the transducer into an image signal, a Doppler processing section for extr... | 03/27/1990 |
| 4905206 | Ultrasonic doppler flow meter A flow meter, in which pulsed continuous ultrasonic wave is transmitted towards an object at predetermined intervals T to obtain a phase vector from a reception signal of wave reflected by the object and which calculates a Doppler frequency from the avera... | 02/27/1990 |
| 4896674 | Ultrasonic diagnosing system An ultrasound diagnosing system includes an ultrasound transmission/reception section, a cross-sectional imaging section, a phase detection section, a filter section, a calculation section, a correction section and a display section. The cross-sectional i... | 01/30/1990 |
| 4884448 | Ultrasonic doppler meter A ultrasonic Doppler meter for measuring the speed of a moving body by measuring the phase shift due to the Doppler effect on received signals, comprising a transmitting/receiving unit transmitting ultrasonic bursts with a constant time interval towards t... | 12/05/1989 |
| 4883060 | Device for eliminating fixed echoes for an ultrasonic echograph A device for eliminating fixed echoes for an ultrasonic echograph, comprising a first filter (100) which consists on the one hand of M parallel lines i (i=1, . . . , M) which a respective delay (i-1)T, where T is the repetition period of the echograph, an... | 11/28/1989 |
| 4873985 | Ultrasonic imaging apparatus utilizing doppler flow metering An ultrasonic imaging apparatus includes an ultrasonic transducer having a matrix of a plurality of ultrasonic transducer elements, and a transmitter/receiver circuit for driving the ultrasonic transducer elements with delay control so that the ultrasonic... | 10/17/1989 |
| 4856529 | Ultrasonic pulmonary artery catheter and method Catheter for making measurements in a vessel defined by a wall carrying a fluid comprising an elongate flexible tubular member having a plurality of lumens extending therethrough and having proximal and distal extremities. An inflatable balloon is carried... | 08/15/1989 |
| 4850364 | Medical ultrasound imaging system with velocity-dependent rejection filtering A medical Doppler ultrasound imaging system with improved filtering to separate blood flow information from clutter due to heart wall and vessel motion. In combination with a clutter rejection filter and velocity determination system as in the prior art, ... | 07/25/1989 |
| 4848354 | Method and apparatus for investigating a circulatory system in living biological structures Method and apparatus for generating a multidimensional map of blood velocities in the circulatory system of living species, using the Doppler effect of backscattered ultrasound from the blood, with real time presentation on a display device, with the abil... | 07/18/1989 |
| 4830016 | Ultrasonic diagnosis apparatus An ultrasonic diagnosis apparatus comprises a probe means for transmitting an ultrasonic pulse beam toward an internal moving part of a living body and receiving the reflected wave therefrom, and a plurality of phasing circuits for simultaneously receivin... | 05/16/1989 |
| 4819652 | C W and pulse Doppler diagnostic system In an interlaced pulse-echo and range-gated Doppler system, an ultrasound transmitter generates a train of constant repetition rate echo pulse interlaced with a Doppler pulse train of plural bursts. The time duration between each burst and the preceding r... | 04/11/1989 |
| 4817619 | Ultrasonic diagnosis apparatus An ultrasonic diagnosis apparatus obtains an ultrasonic wave image of B mode by transmitting an ultrasonic pulse beam toward an internal moving part of a living body at a constant recurrence frequency and receiving the reflected wave therefrom. A speed di... | 04/04/1989 |
| 4817617 | Diagnostic imaging apparatus A diagnostic imaging apparatus is disclosed in which an ultrasonic wave transmit/receive apparatus is used in common for both 2-dimensional B-mode imaging and for measurement of pulsed Doppler signals, by time sharing operation. The good real time charact... | 04/04/1989 |
| 4817618 | Range-continuity anti-aliasing A Doppler blood velocity measuring device is described which includes anti-aliasing circuitry. The anti-aliasing circuitry is based upon the use of a multigate Doppler unit which receives Doppler shift frequency information from various depth ranges. Ther... | 04/04/1989 |
| 4800891 | Doppler velocity processing method and apparatus Method and apparatus for developing an estimation of the velocity of a moving target, comprising, transmitting groups of pulse signals towards the target, receiving groups of echo signals caused by reflections of the transmitted groups of pulse signals fr... | 01/31/1989 |
| 4799490 | Doppler ultrasonic diagnostic apparatus A Doppler ultrasonic diagnostic apparatus for measuring or displaying the velocity information of moving members within an organism by transmitting and receiving ultrasonic waves is used for ultrasonic diagnosis in the medical field and the like. The appa... | 01/24/1989 |
| 4794933 | Ultrasonic blood stream observing apparatus An ultrasonic blood stream observing apparatus based on a pulse Doppler method utilizing as a transmission, a high frequency pulse signal. The frequency fPRF of a transmission pulse repetition signal and the frequency fR of a referen... | 01/03/1989 |
| 4794932 | Conversion control circuit for image display apparatus In an image display apparatus wherein color and black/white display data of an object under examination are utilized to display the object with color and black/white information on a single monitor screen, a gradation converting control circuit is employe... | 01/03/1989 |
| 4790323 | Flow imaging detector Estimates of the average velocity and turbulence of blood flow are determined by weighting the instantaneous frequencies of a returning Doppler signal. The weighting can be chosen so that the estimates are optimized. The weighting can be chosen so as to d... | 12/13/1988 |
| 4790325 | Automatic arterial blood pressure recorder One aspect of the present invention involves a blood pressure recorder system of the type having an inflatable cuff, a pressurized gas source and an inflation valve. The system includes a cuff pressure trigger unit which senses the gas pressure in the cuf... | 12/13/1988 |
| 4787395 | Blood flow measuring apparatus A blood flow measuring apparatus provides a two-dimensional blood stream flow velocity distribution diagram which displays a two-dimensional blood stream flow velocity distribution in a region of a living body to be examined and a one-dimensional blood st... | 11/29/1988 |
| 4780837 | Doppler signal frequency converter A Doppler signal frequency converter for use in an apparatus used to detect and measure the velocity of movement of an object by picking up the reflections of ultrasonic waves beamed at the subject of examination. The converter is provided with one or a p... | 10/25/1988 |
| 4771788 | Doppler tip wire guide An invasive, fluid velocity measuring wire guide particularly adapted and of a size (less than 0.030 inch) for subselective placement in the coronary arterial tree, which includes a Doppler mechanism for determining the blood flow velocity in the region o... | 09/20/1988 |
| 4771789 | Ultrasonic device for measuring acceleration of moving reflective member An ultrasonic device for measuring the acceleration of a moving reflective member that is useful in ultrasonic image diagnosis. The device transmits an ultrasonic wave into a living organism and upon receiving the wave reflected by a moving reflective mem... | 09/20/1988 |
| 4768515 | Ultrasonic blood flow imaging apparatus The present invention provides an ultrasonic blood flow imaging forming apparatus in which ultrasonic beams are transmitted into and reflected by a living body to color-display the distribution of velocity in a moving member and the properties of the livi... | 09/06/1988 |
| 4759374 | Non-invasive blood flow measurements utilizing cardiac cycle synchronization A system for non-invasively determining the amount of blood flow by performing an autoregressive analysis of Doppler shifted acoustical signals resulting from reflected ultrasonic signals from blood cell movement within internal blood vessels. Each cardia... | 07/26/1988 |
| 4759373 | Ultrasonic pulse doppler apparatus An ultrasonic pulse Doppler apparatus has: range gate (20) for separately performing range-gating of the respective received ultrasonic echo signals of the oscillation elements of an ultrasonic probe (1) each time the signals are respectively adjusted in ... | 07/26/1988 |
| 4759375 | Ultrasonic doppler diagnostic apparatus An ultrasonic Doppler diagnostic apparatus usable for ultrasonic image diagnostics accurately determines and displays the velocity of moving reflective members within a subject under observation by transmitting an ultrasonic beam into the subject and rece... | 07/26/1988 |
| 4751929 | Ultrasonic bloodstream diagnostic apparatus with dual displays of velocity profiles and average flow velocity A ultrasonic bloodstream diagnostic apparatus wherein the frequencies of Doppler shift ultrasound information are analyzed by a frequency analyzer to derive a power spectrum represented by N-bit data. The N-bit data comprises (K+M+L) bits, where K represe... | 06/21/1988 |
| 4742830 | Ultrasonic diagnosis apparatus for displaying the distribution of speed of movement of an internal part of a living body An ultrasonic diagnosis apparatus comprises a probe means for transmitting an ultrasonic pulse beam toward an internal moving part of a living body and receiving the reflected wave therefrom, and a plurality of phasing circuits for simultaneously receivin... | 05/10/1988 |
| 4735211 | Ultrasonic measurement apparatus An ultrasonic measurement apparatus provided with a probe connected to a Doppler flow meter, and a movement detecting probe, both of which probes are mounted on an actuator, which is driven by a synthesizer which is adapted to repeatedly reproduce a set w... | 04/05/1988 |
