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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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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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7563229 |
Method and apparatus for automatically measuring delay of tissue motion and deformation
System and method for automatically measuring the delay of tissue motion and deformation. For example, asynchrony may be measured between the left and right ventricles and within the left...
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6943033 |
MAGNETIC RESONANCE METHOD FOR ASSESING AMIDE PROTON TRANSFER EFFECTS BETWEEN AMIDE PROTONS OF ENDOGENOUS MOBILE PROTEINS AND PEPTIDES AND TISSUE WATER IN SITU AND ITS USE FOR IMAGING PH AND MOBILE PROTEIN/PEPTIDE CONTENT
Featured is an MRI/NMR methodology or process to detect amide protons of endogenous mobile proteins and peptides via the water signal. Such methods and processes can be used for the purposes of...
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6939301 |
Automatic volume measurements: an application for 3D ultrasound
A method for determining the volume of an irregularly shaped body part or body such as a fetus using a 3D ultrasonic image composed of light and dark pixels. A caliper is placed on a portion whose...
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6663568 |
Ultrasound techniques
A method of estimating the volume flow in a vessel utilizing ultrasound techniques including the steps of imaging the vessel utilizing an ultrasonic transducer array so as to produce fluid velocity...
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6638221 |
Ultrasound diagnostic apparatus, and image processing method
Two-dimensional distribution data of velocities on a moving object in an object to be examined is obtained. A motion field which defines the motion direction of a tissue is stored. A plurality of...
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6626838 |
Blood flow meter apparatus and method of use
A strobed blood flow meter provides periodic measurements of blood flow velocity or volumetric blood flow over a cardiac cycle at reduced average power consumption, which is advantageous for...
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6595923 |
Ultrasonic doppler flow phantom
An ultrasonic Doppler flow phantom is described which is formed of tissue-mimicking material containing a plurality of fluid flow paths through which fluid is pumped. The fluid flow paths are made...
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6592522 |
Ultrasound display of displacement
An ultrasound machine that generates a color representation of moving structure, such as cardiac wall tissue within a region of interest, and is displayed on a monitor. The color representation is...
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6589179 |
Three-dimensional doppler ultrasonic imaging system and method
An ultrasonic imaging system uses a specially configured scanhead to provide ultrasound return signals that are processed by an imaging unit to generate a three-dimensional Doppler ultrasound...
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6579240 |
Ultrasound display of selected movement parameter values
An ultrasound machine is disclosed that generates a color representation of moving structure, such as a cardiac wall tissue within a region of interest, and is displayed on a monitor. The color...
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6544181 |
Method and apparatus for measuring volume flow and area for a dynamic orifice
Techniques are provided for obtaining selected instantaneous area measurements for a dynamic orifice through which blood is flowing in at least one direction, for obtaining instantaneous flow rates...
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6450959 |
Ultrasound B-mode and doppler flow imaging
An ultrasound scanning system ( 10 ) includes a plurality of range gates ( 71-74 ) responsive to ultrasound waves for generating a plurality of Doppler signal samples representing different depth...
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6318179 |
Ultrasound based quantitative motion measurement using speckle size estimation
An ultrasound system determines the relative movement in a first direction (F1) of first matter, such as blood flow, and second matter, such as an artery wall, in a subject under study (S). A beam...
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6071242 |
Method and apparatus for cross-sectional color doppler volume flow measurement
A system is disclosed for measuring volume flow through vessel. A longitudinal area of a vessel in a body is scanned using a color Doppler imaging method, such that an imaging plane is formed...
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5910117 |
Real time color doppler ultrasound imaging
A method for generating color Doppler images is implemented in real time using digital processing steps implemented on multi-purpose microprocessors. Processing is reduced by estimating velocity...
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5895358 |
Method and apparatus for mapping color flow velocity data into display intensities
A method and an apparatus for mitigating aliasing when imaging moving fluid or tissue using velocity Doppler shift data. To eliminate the effects of slight aliasing in the velocity mode,...
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5720291 |
Three dimensional medical ultrasonic diagnostic image of tissue texture and vasculature
A medical diagnostic ultrasound system is described in which ultrasonic B mode tissue information and Doppler flow information is acquired from a volumetric region of the body and processed...
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5690111 |
Ultrasound diagnostic apparatus
An ultrasound diagnostic apparatus comprises an ultrasonic transducer and a transmitter/receiver circuit for scanning a plane section of a human body under examination with ultrasonic beams...
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5682896 |
Method and apparatus for generating volume flow measurement
A computer implemented method and apparatus for generating a vascular volume flow measurement in a living subject using an ultrasonic system by determining a velocity measurement and an area...
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5653237 |
Apparatus for measuring biological signal
An apparatus for measuring biological signals includes: a whole function input unit for detecting a parameter representing a whole function of an organ of a body to be measured; a regional function...
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5623930 |
Ultrasound system for flow measurement
An ultrasonic transducer is rotated until the displayed vessel has the smallest area. The transducer is then tilted to various angles with respect to a normal to a surface to obtain area and...
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5575290 |
Coarse-fine ultrasound transducer array for medical imaging
The ultrasound transducer array defines an average row spacing along the elevation for receiving transducer elements that differs from an average row spacing along the elevation for transmitting...
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5555886 |
Apparatus and method for detecting blood vessel size and direction for doppler flow measurement system
An ultrasonic diagnostic system is provided that automatically measures a volumetric flow rate of a vessel presented on a graphical display by estimating the vessel size and direction. The Doppler...
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5515857 |
Ultrasonic diagnostic apparatus
A bloodstream velocity image is formed by scanning a two-dimensional region including a blood vessel in a body to be examined with an ultrasonic wave. A velocity profile is formed by distributing...
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5505204 |
Ultrasonic blood volume flow rate meter
A volume flow meter for displaying two-dimensional volume flow through a vessel, comprising an ultrasound instrument with scan head, a location and orientation sensor mounted to the scan head, and...
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5501224 |
Ultrasonic diagnostic apparatus
An ultrasonic diagnostic apparatus including a probe which transmits a burst wave of ultrasonic pulses into a target in a body and receives reflected echo signals, a transmission unit which drives...
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5495852 |
Method and apparatus for estimating diameter of an artery using B-mode ultrasonic images
An improved apparatus and method for measuring the diameter of an artery utilizes an ultrasonic imaging plane that is rotated slightly from the centerline of an artery to produce a "skew" image of...
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5465721 |
Ultrasonic diagnostic apparatus and ultrasonic diagnosis method
A two-dimensional echogram or a tomogram (B-mode image) and a volume of an organ are displayed in real time while radiating an ultrasonic wave to the organ. The volume of the organ is obtained by...
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5379771 |
Ultrasonic imaging apparatus
An ultrasonic imaging apparatus comprised of an ultrasonic transducer array that transmits ultrasonic waves to a subject under examination and receives ultrasonic waves reflected from within the...
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5365929 |
Multiple sample volume spectral Doppler
An ultrasonic diagnostic system simultaneously monitors the Doppler signal of a plurality of sample volumes within the body of a patient which are aligned around a point of diagnostic interest...
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5333614 |
Measurement of absolute vascular flow
A vascular flow measurement catheter device for measuring total volumetric flow through a vessel includes a flow-measurement catheter having a full flow lumen of known cross sectional geometry...
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5322067 |
Method and apparatus for determining the volume of a body cavity in real time
A method and apparatus for determining the volume of a fluid-filled cavity in a patient's body in real time from an ultrasound image. An ultrasound display of the cavity and the surrounding tissue...
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5320105 |
Ultrasonic echograph for measuring high velocities of blood flows
An echograph includes a transmission stage (20), a circuit (31) for suppressing fixed echos, and a correlation-interpolation circuit (33). The the transmission stage (20) transmits a pulsed signal...
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5280787 |
Ultrasonic method and apparaus for determination of vessel location and size
An improved technique for establishing the position, dimensions and orientation of a vessel which is essentially free of internal acoustic discontinuities involves scanning the vessel with a beam...
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5235985 |
Automatic bladder scanning apparatus
The automatic bladder scanning apparatus includes a transducer assembly (30), which includes a plurality of individual transducer elements (32). A first plurality of transducer elements are...
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5224482 |
Ultrasound high velocity flow correlation measurement using coded pulses
An ultrasound high velocity flow measurement apparatus uses cross-correlation between consecutive echoes of coded pulses which are matched filtered at the receiver to determine velocity profiles of...
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5224483 |
Adaptive contrast enhancement for scanned ultrasonic image
A method and apparatus for adaptively enhancing a scanned ultrasound image of a body portion having both areas of tissue and areas of blood pool. Clutter which appears in the blood pool areas is...
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5211169 |
Blood pool imaging and analysis technique using ultrasound
A blood pool imaging and analysis technique and apparatus uses ultrasound to examine areas of interest within the human body. The Doppler effect is used to determine the velocity of blood and...
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5203337 |
Coronary artery imaging system
A coronary artery imaging system is described in which a catheter is provided with a forward looking sonic transducer for measuring fluid flow in arteries without disturbing the flow and a...
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5199437 |
Ultrasonic imager
The invention provides an intracavitary ultrasonic scanner with a helical scan. Mechanical and electronic steerable array implementations of the helical scan are described. A plastic cover sheath,...
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5195521 |
Tissue measurements
A system for deriving signals representing a selected cross sectional area and volume of a region of interest in tissue. In the preferred embodiment, area and volume of a fluid filled cavity...
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5139020 |
Method and apparatus for controlling the hemodynamic state of a patient based on systolic time interval measurements detecting using doppler ultrasound techniques
A hemodynamic control apparatus and method for regulating blood flow within the cardiovascular system in a closed-loop control system using ultrasound measurement techniques and intracardiac...
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5078148 |
Apparatus and method for continuously measuring volumetric blood flow using multiple transducers and catheter for use therewith
Apparatus for measuring volumetric flow of a liquid in a vessel having a wall and having an axis extending longitudinally of the vessel parallel to the vessel wall. A flexible catheter is adapted...
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5062427 |
Ultrasonic doppler apparatus
An input device for specifying a first measuring point near an orifice, for example, at the valve port position of the heart on a color Doppler image and a second measuring point on the centerline...
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5052395 |
Non-invasive ultrasonic pulse doppler cardiac output monitor
A cardiac output measurement device for the real-time, non-invasive measurement of cardiac output that can be effectively operated by relatively unskilled personnel on a routine monitoring basis in...
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4913159 |
Method for determining blood flow through a narrowed orifice using color doppler echocardiography
A multi-gated pulsed wave color Doppler imaging system is used to provide accurate non-invasive measurements of liquid flow through a narrowed orifice by using the color Doppler to first measure...
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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...
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4807636 |
Method and apparatus for measuring volume fluid flow
A system is provided for measuring volume blood flow using non-invasive ultrasonic Doppler techniques. This system includes a probe assembly including a transducer having an inner transducer...
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