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7611467 |
Method and apparatus for extracting an envelope curve of a spectrogram
A method and apparatus for extracting an envelope curve of a spectrogram, for use in measurement of blood flow velocity by using spectral Doppler techniques, the method comprising steps of:...
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7604599 |
Systems and methods for using dynamic vascular assessment to improve vascular stent placement, application, design and marketing
The invention relates to systems and methods for assessing blood flow in single or multiple vessels and segments, for assessing vascular health, for conducting clinical trials, for screening...
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7598658 |
Ultrasonic probe
An ultrasonic probe includes piezoelectric elements each including grooves parallel to each other and arrayed in a direction substantially parallel to the grooves, and a mixed member which is to...
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7591787 |
Method for removing Doppler angle ambiguity
A method of measuring blood flow including several steps. In an initial step a first ultrasound beam is oriented in a direction substantially perpendicular to the direction of the blood flow to be...
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7546154 |
Method and apparatus for automatic detection of anomalies in vessel structures
In a method and apparatus for fully automatic detection of anomalies in vessel structures, a 3D volume data set of an imaging 3D measurement of the vessel structure is obtained and, for an...
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7513873 |
Low-noise ultrasound method and beamformer system for doppler processing
An ultrasonic low-noise analog beamformer for Doppler acquisition achieves high sensitivity by translating the frequency of the ultrasound echoes to an intermediate frequency, which is well above...
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7513871 |
Blood flow analysis system
A portable apparatus for conveying blood flow parameters to a user, the apparatus comprising: a transducer device for providing for Doppler monitoring of flows within a patient; a processing unit...
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7466256 |
Universal ultrasound sigma-delta receiver path
Ultrasound information for B-mode and CW Doppler mode use the same digital beamformer. Due to sigma-delta conversion or over sampling, sufficient dynamic range is provided for the desired...
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7338450 |
Method and apparatus for performing CW doppler ultrasound utilizing a 2D matrix array
An ultrasound system is provided comprising an ultrasound probe having a 2D matrix of transducer elements transmitting a continuous wave (CW) Doppler transmit signal into an object of interest. The...
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7169108 |
CW beam former in an ASIC
The present invention relates to a continuous wave Doppler beam former application specific integrated circuit (CW-ASIC). The beam former may be a transmit or receive beam former. In one mode the...
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6726628 |
Angle-independent doppler system for screening
An apparatus and method for detecting the highest velocity of fluid flow with in a volume having multiple sources of fluid flow with different velocities. There are multiple pairs of receiving...
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6723051 |
Systems and methods for assessing vascular health
The present invention relates generally to systems and methods for assessing blood flow in blood vessels, for assessing vascular health, for conducting clinical trials, for screening therapeutic...
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6712765 |
Ultrasonic scanning method and apparatus
An ultrasonic imaging technique and apparatus with a portable scanning head. In one form of the scanning head, a reflective scanner is provided with a variable focus, and in another form the...
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6699193 |
Decision support systems and methods for assessing vascular health
The present invention relates generally to systems and methods for assessing blood flow in blood vessels, for assessing vascular health, for conducting clinical trials, for screening therapeutic...
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6656122 |
Systems and methods for screening for adverse effects of a treatment
The present invention relates generally to systems and methods for assessing blood flow in blood vessels, for assessing vascular health, for conducting clinical trials, for screening therapeutic...
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6558329 |
Medical ultrasound receive architecture
An ultrasound system that performs image processing in the digital domain, including CW Doppler. The ultrasound system is provided with a transducer having a plurality of elements and an ultrasound...
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6558323 |
Ultrasound transducer array
By bonding a conductive first matching layer 14 to the acoustic radiation surface side, which is the bottom side, of a belt-shape piezoelectric element on both faces with electrodes provided, and...
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6547737 |
Intelligent transcranial doppler probe
A system for automatic manipulation of a transcranial Doppler probe device designed for placement on a patient's head comprising a bi-temporal probe hanger, a cylindrical probe housing having an...
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6527722 |
Wide dynamic range continuous wave (CW) Doppler receiver
A Doppler receiver has a wide dynamic range and operates in a differential mode. In one embodiment, the invention is a wide dynamic range continuous wave (CW) Doppler receiver, comprising a...
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6346081 |
Angle-independent continuous wave doppler device
An apparatus for determining the velocity of a fluid flowing through a lumen comprises a first diffraction grating transducer (DGT) responsive to a continuous wave (CW) input and operable in a...
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6030221 |
Ultrasonic apparatus and for precisely locating cavitations within jawbones and the like
A method and apparatus detects cavitation in the jawbone of human. The apparatus generates an ultrasonic pulse and passes the pulse through the jawbone of a human. The pulse is detected by an...
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5908391 |
Method and apparatus for enhancing resolution and sensitivity in color flow ultrasound imaging using multiple transmit focal zones
A method and an apparatus for increasing the spatial resolution and sensitivity of a color flow image while maintaining a desired acoustic frame rate. The ultrasound energy is concentrated at a...
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5807259 |
Ultrasonic continuous wave doppler blood flow-meter
An ultrasonic continuous wave doppler blood flow-meter deflects an ultrasonic continuous wave to an arbitrary angle and transmits it into an organism, thereby measuring a blood flow speed of the...
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5562097 |
User control for steerable CW doppler
A method and apparatus of operating an ultrasound imaging apparatus so as to obtain continuous wave (CW) Doppler data from a user selected area comprises operating a multiple element transducer...
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5406949 |
Digital processing for steerable CW doppler
A Doppler medical ultrasound apparatus, comprising means for transmitting ultrasound energy into a body, a plurality of parallel channels for receiving echoes of the ultrasound energy, digitizing...
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5197477 |
Ultrasonic Doppler flow measurement system with tissue motion discrimination
An ultrasonic diagnostic system for measuring fluid flow velocities through Doppler techniques is provided which eliminates the effects of tissue motion from fluid flow velocity information. In a...
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4986276 |
Flow detector
An ultrasonic, transcutaneous blood flow detector. A protective mounting cup is positionable against the skin of a patient for the transfer of ultrasonic energy into and out of the patient's body....
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4926872 |
Ultrasonic transducer system and method for the operation thereof
This invention provides an ultrasonic transducer system which utilizes a reconfigurable delay line to perform a variety of processing functions. In particular, for a preferred embodiment, the delay...
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4924869 |
Ultrasonic diagnostic system
To apply our new invention in the most preferred application mode, we used an ultrasonic diagnostic system that can instantaneously switch over to the CW Doppler method or B-mode imaging method...
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4886069 |
Method of, and apparatus for, obtaining a plurality of different return energy imaging beams responsive to a single excitation event
A method for receiving a return signal from each of plurality M of different beam directions in media excited by a single excitation event, is to: assign each of the M directions to be...
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4880010 |
Method of and apparatus for ultrasonic imaging
Ultrasonic imaging is effected using a line focused transmitter 1 and a line focused receiver 3 arranged with their focal lines (f T , f R ) crossing, and controlled such that the crossing point P...
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4866613 |
Ultrasonic continuous wave blood flowmeter using Doppler effect analysis
An ultrasonic continuous wave blood flowmeter using Doppler effect analysis includes a filter having a cut-off frequency determined in part by a manually selected zero shift value. A tranducing...
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4844083 |
Ultrasonic imaging apparatus
An ultrasonic imaging apparatus having an ultrasonic transducer for applying an ultrasonic beam to a subject, thereby to perform sector scanning. Echo waves are obtained by the sector scanning. The...
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4796634 |
Methods and apparatus for monitoring cardiac output
A method and apparatus for ascertaining the cardiac output of a human patient, said method comprising the steps of: measuring the systolic velocity of the blood flowing through the patient's...
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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...
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4651745 |
Ultrasonic Doppler diagnostic device
An ultrasonic diagnostic device for measuring the velocity of blood flow within a living body comprises a transmitter for transmitting an ultrasonic wave into the body, a receiver for amplifying...
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4622978 |
Ultrasonic diagnosing apparatus
An ultrasonic diagnosing apparatus transmits an ultrasonic wave into a subject under examination, thereby obtaining a tomogram and blood flow information of the subject. This ultrasonic diagnosing...
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4608993 |
Blood flow measurement device and method
The disclosure relates to systems for measuring blood flow by detecting Doppler shift of ultrasound reflected by blood components moving in a blood vessel. The systems employ electronic techniques...
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4586512 |
Device for localized heating of biological tissues
A device for therapeutic heating by hyperthermia comprises an emitter which focuses ultrasonic radiation into biological tissues and produces localized heating, especially for the treatment of...
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4584880 |
Tissue signature tracking tranceiver
An ultrasound tranceiver providing enhanced imaging by selective filtering of the received signal to provide a variable frequency, constant bandwidth filtering of the received echo signals. The...
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4563899 |
Ultrasonic imaging apparatus using transducer control
In an ultrasonic imaging apparatus, the pulser applies drive pulses to the transducer element. Depending upon the transducer characteristics and the scanning mode of the ultrasonic beams, the...
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4559952 |
Method of ultrasonically measuring blood flow velocity
Method and apparatus for ultrasonic blood flow velocity measurement based upon the doppler principle (doppler measurement), combined with simultaneous echo amplitude imaging by employing ultrasonic...
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4556067 |
Bandwidth indicator for Doppler blood flowmeters
The analog broadband output signal of a medical Doppler device is sampled at a constant rate to convert the signal to digital form. The sample values are stored consecutively in a random access...
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4209022 |
Echography apparatus for medical diagnosis, using a multiple-element probe
An ultra-sonic echography apparatus comprises a probe with multiple elements switched at the rate of transmission pulses and moved along a contour of the test body. Its position is registered by a...
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4198987 |
Measuring system including elements implantable beneath the skin
A system is disclosed having a portion permanently implantable beneath the skin to perform in vivo measurements, such as Doppler ultrasonic blood flow velocity measurements. Measurement information...
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4152928 |
System for detecting fat particles in blood
A system utilizing a bank of frequency staggered band-pass filters spanning the range in which fat emboli are known to occur is provided for the early detection of fat emboli in blood.
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4109642 |
Apparatus for ultrasonic arteriography
Continuous wave ultrasonic sound waves from a transmitter and receiver are highly focused to a width of approximately 1 millimeter or less and are transmitted and received through intersecting...
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4062237 |
Crossed beam ultrasonic flowmeter
A crossed beam ultrasonic flowmeter particularly suited for measuring two dimensional arterial blood flow has two pairs of ultrasonic beam transmitting transducers the beams of which are focused to...
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3987673 |
Ultrasonic transducer devices
A flowmeter for measuring blood flow in a vascular channel by Doppler Techniques has an assembly of electro-ultrasonic transducers which direct ultrasonic radiation to a zone spaced from the...
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3948248 |
Method of measuring ocular pulse
A method of obtaining a reading of the ocular pulse in its unbiased, natural state by transmitting continuous wave ultrasonic energy to the eye from a source spaced from the eye, receiving said...
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