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Doppler effect (e.g., fetal HR monitoring)

Subclass of:

600 - Surgery

600300000 - DIAGNOSTIC TESTING

600407000 - Detecting nuclear, electromagnetic, or ultrasonic radiation

600437000 - Ultrasonic

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Class / Patent application numberDescriptionNumber of patent applications / Date published
600454000 Blood flow studies 125
Entries
DocumentTitleDate
20130030299ULTRASOUND SYSTEM AND METHOD FOR CORRECTING DOPPLER ANGLE - There are provided embodiments for measuring an inclination angle of an ultrasound probe to correct a Doppler angle in real time. In one embodiment, by way of non-limiting example, an ultrasound system comprises: an inclination measuring unit configured to measure an inclination angle of an ultrasound probe at a predetermined cycle to form measuring information including the inclination angle, wherein the inclination measuring unit is mounted inside or outside of the ultrasound probe; and a processing unit configured to calculate a Doppler angle correction value corresponding to the inclination angle based on the measuring information and calculate a corrected Doppler angle based on the Doppler angle correction value.01-31-2013
20090156938METHOD AND APPARATUS FOR IMPLEMENTING DOPPLER SCAN CONVERSION - A method for Doppler scan conversion includes storing coded envelope values together with spectrum data in a memory out of a logic device with a large capacity, which increases the number of envelopes stored, reduces the use of the restricted embedded memory resources, and can also achieve the envelope switching more flexibly. If the number of envelopes is not greater than the difference between the bit width of the memory and that of the spectrum data, the increase in the number of envelopes will not increase significantly the logic resources or affect the efficiency of the system.06-18-2009
20110015526METHODS AND APPARATUS FOR ULTRASOUND IMAGING - Some embodiments include acquisition of color Doppler data, detection of one or more transitions of the color Doppler data, each of the one or more transitions being between a first area representing flow velocity in a first direction and a second area representing flow velocity not in the first direction, and application of a first set of aliasing corrections to the color Doppler data to generate second color Doppler data.01-20-2011
20130060143DOPPLER PROBE PLACEMENT DEVICE AND METHOD OF USE - The present invention is directed towards a placement device for a flat Doppler probe and a method of use that allows for hands-free use of a flat Doppler probe. The device replaces gel for transmitting and receiving ultrasound signals or alternatively encapsulates the gel. The placement device includes a hydrophilic surface that contacts a patient and allows for the transmission and receiving of ultrasound signals. The placement device eliminates the use of gel for easier clean up and optimizes the transmission of ultrasound signals. The placement device includes an adhesive on the patient contacting surface that allows the placement device to adhere to a surface on a patient.03-07-2013
20090012398METHOD AND APPARATUS FOR FILLING DOPPLER SIGNAL GAPS IN ULTRASOUND DIAGNOSTIC IMAGING - The present invention provides a method and apparatus for filling Doppler signal gaps. The method comprises steps of: storing Doppler signals before and after a gap; analyzing spectral characteristics of the Doppler signals to be filled; judging whether the Doppler signals are to be frequency compensated according to the spectral parameters; compensating the Doppler signals; and filling the gap by means of weighting and superposing the frequency compensated Doppler signals to be filled and the original Doppler signals before and after the gap based on the judging result. According to the method of the present invention, the Doppler signals before and after the gap are first subjected to frequency compensation, and then weighted and superposed with the acquired Doppler signals, thus obtaining a continuous spectrogram and audio output and maintaining the original spectral characteristics of the Doppler signal.01-08-2009
20130165793PROVIDING DOPPLER INFORMATION OF TARGET OBJECT BASED ON VECTOR DOPPLER IN ULTRASOUND SYSTEM - There are provided embodiments for providing Doppler information of a target object by using vector Doppler. In one embodiment, by way of non-limiting example, an ultrasound system comprises: a processing unit configured to form vector information of a target object based on ultrasound data corresponding to the target object, the processing unit being further configured to form motion information corresponding to motion of the target object based on the vector information, wherein the motion information includes at least one of a Doppler spectrum image and a Doppler sound.06-27-2013
20130165792FORMING VECTOR INFORMATION BASED ON VECTOR DOPPLER IN ULTRASOUND SYSTEM - There are provided embodiments for transmitting ultrasound signals to a living body including a moving target object in at least one transmission direction, and receiving ultrasound echo signals from the living body in at least one reception direction to form vector information of the target object. In one embodiment, by way of non-limiting example, an ultrasound system comprises: an ultrasound data acquiring unit configured to transmit ultrasound signals to a living body including a moving target object in at least one transmission direction, and receive ultrasound echo signals from the living body in at least one reception direction to acquire ultrasound data; and a processing unit configured to form vector information of the target object based on ultrasound data corresponding to the at least one reception direction.06-27-2013
20120022377Transcranial Doppler Apparatus - The disclosure is directed to a transcranial Doppler probe. The transcranial Doppler probe includes a spherical bearing, a piezoelectric transducer pivotally attached to the spherical bearing, and first and second rods coupled to the piezoelectric transducer. The first rod is configured to pivot the piezoelectric transducer around a first pivot axis and the second rod is configured to pivot the piezoelectric transducer around a second pivot axis.01-26-2012
20120232399APPARATUS AND METHOD FOR GENERATING DOPPLER IMAGE - A method for generating a Doppler image by using a ultrasound system, the method including: transmitting a ultrasound signal to an object and receiving a response signal reflected from the object; converting the response signal into a plurality of in-phase/quadrature-phase (I/Q) signals having different frequencies; and generating a Doppler image of the object based on information about a speed of the object obtained from the plurality of I/Q signals.09-13-2012
20090299188ULTRASOUND DIAGNOSTIC APPARATUS - A PSK modulator 12-03-2009
20100063395Telemedicine platform for standardized interpretation of vascular data using vascular analysis - A system and method, for obtaining and analyzing vascular data and generating results, that uses vascular test data to determine the state of the vessel. The data and the determinations can be used to generate reports, render diagnoses or identifying ailments, and may do so remotely. The system includes a telemedicine server and may include a number of other modules such as work stations, review tools, data storage modules, etc. The invention allows rapid and efficient analysis of the data, and provides mechanisms for comparing patient data to know or measured normative data sets, remotely if desired, and provides more accurate and less invasive diagnoses based on vascular conditions. The invention permits remote receipt, processing and distribution of the data and diagnoses.03-11-2010
20120035482METHOD FOR ESTIMATING ACOUSTIC VELOCITY OF ULTRASONIC IMAGE AND ULTRASONIC DIAGNOSIS APPARATUS USING THE SAME - Disclosed herein are a method for estimating acoustic velocity of an ultrasonic image and an ultrasonic diagnosis apparatus using the same. The method for estimating acoustic velocity of an ultrasonic image includes: (A) dividing each of the ultrasonic images into a plurality of blocks; (B) extracting contours of ultrasonic images for each block of one frame among the ultrasonic images; (C) calculating and analyzing average luminance values of each block; (D) determining the optimal block number using the average luminance values and selecting the optimal blocks; and (E) estimating and applying the real acoustic velocity, whereby the acoustic velocity is estimated in real time and is applied to the ultrasonic diagnosis apparatus.02-09-2012
20100087738SYSTEMS AND METHODS FOR QUANTIFYING CARDIAC DYSSYNCHRONY - In one embodiment, a system and method for quantifying cardiac dyssynchrony relate to capturing images of the heart over time as it beats, generating heart function profiles for discrete portions of the myocardium from the captured images, the heart function profiles each pertaining to a heart function parameter as a function of time, and performing cross-correlation on the generated heart function profiles to yield a cross-correlation function that identifies a time delay at which the heart function profiles temporally correlate most closely, the time delay being indicative of a degree of cardiac dyssynchrony.04-08-2010
20090177089THREE-DIMENSIONAL IMAGE RECONSTRUCTION USING DOPPLER ULTRASOUND - A method for imaging of an anatomical structure includes acquiring a plurality of ultrasonic images of the anatomical structure. At least one of the images includes Doppler information. One or more contours of the anatomical structure are generated from the Doppler information. A three-dimensional image of the anatomical structure is reconstructed from the plurality of ultrasonic images, using the one or more contours.07-09-2009
20080208057METHOD AND APPARATUS FOR NON-INVASIVE ULTRASONIC FETAL HEART RATE MONITORING - A continuous, non-invasive fetal heart rate measurement is produced using one or more ultrasonic transducer array patches that are adhered or attached to the mother. Each ultrasound transducer array is operated in an autonomous mode by a digital signal processor to obtain data from which fetal heart rate information can be derived. Each ultrasonic transducer array patch comprises a multiplicity of subelements that are switchably reconfigurable to form elements having different shapes, e.g., annular rings. Each subelement comprises a plurality of interconnected cMUT cells that are not switchably disconnectable. The use of cMUT patches will provide the ability to interrogate a three-dimensional space electronically (i.e. without mechanical beam steering) with ultrasound, using a transducer device that is thin and lightweight enough to stick to the patient's skin like an EKG electrode. The ultrasound device can track the fetal heart in three-dimensional space as it moves due to the mother's motion or the motion of the unborn child within the womb.08-28-2008
20110208060Non-contact Biometric Monitor - A non-contact system utilizing an air-propagated ultrasound for monitoring biometric parameters is disclosed. A non-contact sensor transmits an ultrasonic wave toward a subject. The wave is reflected by the subject's skin surface back toward the sensor. Electronics in the sensor measure the small changes in displacement of the skin surface to derive a plurality of biometric parameters, including but not limited to respiration rate, heart rate, eye motion, and limb movement.08-25-2011
20130218014ULTRASOUND APPARATUS AND METHOD OF GENERATING ULTRASOUND IMAGE - A method of generating an ultrasound image includes transmitting an ultrasound signal to a predetermined point included in an object and receiving at least three response signals reflected from the predetermined point; extracting a plurality of response signal pairs by combining the received at least three response signals two-by-two; obtaining a plurality of pieces of prediction vector information, each of the pieces of prediction vector information indicating a prediction velocity magnitude and a prediction velocity direction of the predetermined point, based on reception angles and Doppler frequencies of the response signals included in the plurality of response signal pairs; and determining vector information indicating a velocity magnitude and a velocity direction of the predetermined point, based on the plurality of pieces of prediction vector information.08-22-2013
20100099990Doppler Signal Processing For An Enhanced Spectral Doppler Image - Embodiment for processing Doppler signals for an enhanced spectral Doppler image in an ultrasound system is disclosed. The Doppler signals, which are obtained by transmitting/receiving an ultrasound signal to/from a target object, are window-processed with a plurality of windows, each of the windows having different sizes. The window-processed Doppler signals are transformed into a plurality of frequency-domain Doppler signals. The transformed Doppler signals are compounded and then a spectral Doppler image is formed based on the compound Doppler signals.04-22-2010
20100004542SYSTEM AND METHOD FOR ULTRASOUND COLOR DOPPLER IMAGING - Systems and methods for color Doppler imaging in an ultrasound imaging system are disclosed herein. An ultrasound imaging system includes color Doppler imaging circuitry. The color Doppler imaging circuitry is configured to estimate flow parameters. The imaging circuitry includes a radio frequency (“RF”) demodulator configured to produce in-phase and quadrature components of an ultra-sound data vector. The RF demodulator includes a table in memory that stores interleaved sine and cosine values. The RF demodulator maintains an index value for the table having higher precision than is used to index the table. The RF demodulator rounds the index value for each access of the table. Each table access retrieves a sine value and a cosine value.01-07-2010
20100280383Color Doppler Mode Image Processing In An Ultrasound System - Embodiments for processing a color Doppler mode image in an ultrasound system are disclosed. In one embodiment, the ultrasound system includes: a Doppler signal acquisition unit configured to transmit and receive ultrasound signals to and from a target object to acquire first Doppler signals; and a processing unit configured to form color Doppler mode images including power images and velocity images and a mask for detecting a region of interest by using the color Doppler mode images, the processing unit being further configured to mask the power images and the velocity image by using the mask.11-04-2010
20090264761ENHANCED INTRALUMINAL FLOW MEASUREMENT SYSTEM USING REFERENCE AND COMBINED SIGNALS - An enhanced intraluminal flow measurement system and method is conducive for a low-power ultrasonic system that can use continuous-wave (CW) Doppler sensing and wireless RF telemetry. Applications include measurement of blood flow in situ in living organisms. Implementations include an extraluminal component located outside of a body, such as a human or animal body, containing a lumen. The extraluminal component can be wirelessly coupled via an RF magnetic field or other RF field to an implantable intraluminal component. The intraluminal component (i.e. implant) is implanted inside of the lumen of the body such as a heart or elsewhere in a vasculature (such as in a dialysis shunt). The intraluminal component can telemeter, via RF electromagnetic signals, flow data directly out of the body housing the intraluminal component to be received by the extraluminal component.10-22-2009
20120197128Transthoracic Cardio-Pulmonary Monitor - Operation of a patient's heart or lungs may be analyzed by transmitting ultrasound energy into the patient's lung, and detecting Doppler shifts of reflected ultrasound induced by moving borders between blood vessels/soft tissue in the lung and air filled alveoli that surround the blood vessels. Movement of the border is caused by pressure waves in the blood vessels that result in changes in diameter of those blood vessels. The detected Doppler shifts are processed with a noise reduction algorithm, and periodic features in the resulting data are then analyzed to determine the rate of the patient's heartbeat, the rate of the patient's breathing, and/or the appearance of anomalies in the patient's heartbeat08-02-2012
20090216127Cough Detector - A device for detecting and counting coughing events is provided. In one embodiment a sensor for sensing and transducing low frequency and high frequency mechanical vibrations, sends signals to a coincidence detector that determines if high and low signals coincide. In another embodiment, ultrasonic energy is introduced to the trachea and if Doppler shift in frequency is detected, association is made to a coughing event. In another embodiment a change in the impedance of the neck is considered associated with coughing event if correlated over time with a specific mechanical frequency sensed.08-27-2009
20090030318Infant umbilical cord cardiac monitoring system and method - An infant umbilical cord monitoring system having a hinged housing adapted to receive both an umbilical cord clamping means and a means for measuring physiological data of the infant. A method of using an infant's umbilical cord for obtaining physiological data includes applying an umbilical cord clamping means to the infant's umbilical cord, positioning a hinged housing adapted to receive both the umbilical cord clamping means and a means for measuring physiological data of the infant against the infant and detecting the physiological data of the infant.01-29-2009
20090240153Clutter Signal Filtering In An Ultrasound System - Embodiments for filtering clutter signals from receive signals obtained in a Doppler mode in an ultrasound system are disclosed. In one embodiment, the ultrasound system comprises a Tx/Rx unit, a signal processing unit and an input unit. The Tx/Rx unit transmits ultrasound signals to a target object and receives echoes reflected from the target object. The signal processing unit processes the received echoes to provide 2-dimensional image data of the target object, the 2-dimensional image data being representative of a 2-dimensional image. The input unit enables a user to set a region of interest (ROI) on the 2-dimensional image of the target object. The Tx/Rx unit and the signal processing unit are further configured to operate such that a Doppler mode image pixel data corresponding to the ROI is obtained. The signal processing unit is further configured to set filter cutoff frequencies based on characteristics of the Doppler mode image pixel data and filter the Doppler mode image pixel data with the set filter cutoff frequencies to output filtered pixel data with clutter signals filtered.09-24-2009
20100160784Wireless Ultrasound Probe With Audible Indicator - A wireless ultrasound probe has a probe case enclosing a transducer array, an acquisition circuit, a transceiver and a battery. The probe also includes a loudspeaker which produces audible sounds during use of the probe. The loudspeaker, which may be a piezoelectric loudspeaker, issues an alert when battery power is low or signal strength of the wireless transmission is poor or nonexistent. The loudspeaker can provide user feedback to the actuation of a button or control on the probe. The loudspeaker can provide haptic feedback during use of the probe, and can be used to produce audio Doppler tones or heart sounds during probe use.06-24-2010
20130123636Methods and Devices For Proper Stabilization Of Fetal Monitoring Devices - Certain embodiments of the present invention provide fetal monitoring belt devices. The fetal monitoring belt devices include belts and a back support. In certain embodiments, the belts may further include one or more rows of buttonholes to provide multiple places for attachment of one or more ultrasound transducers via buttonhooks. In certain embodiments, the back support may further include an interior pouch to hold a therapeutic device, such as a hot or cold pack and/or a vibration element. The fetal monitoring belt devices of the present invention provide a comfortable, long-term, stable way of maintaining the proper positioning of ultrasound transducers during prenatal exams, labor and delivery.05-16-2013
20130123637METHOD OF REDUCING ULTRASOUND SIGNAL AMBIGUITY DURING FETAL MONITORING - The present invention relates to a method and a device for fetal cardiac monitoring. For improving ultrasonic monitoring, the number of periodic signals, such as signals caused by the fetus and the mother, is assessed and the time window of the signal demodulation is adapted if more than one periodic signal is assessed.05-16-2013
20100240999SYSTEMS AND METHODS FOR POINT IN TIME MEASUREMENT OF PHYSIOLOGIC MOTION - A radar-based physiological motion sensor is disclosed. Doppler-shifted signals can be extracted from the signals received by the sensor. The Doppler-shifted signals can be digitized and processed subsequently to extract information related to the cardiopulmonary motion in one or more subjects. The information can include respiratory rates, heart rates, waveforms due to respiratory and cardiac activity, direction of arrival, abnormal or paradoxical breathing, etc. In various embodiments, the extracted information can be displayed on a display.09-23-2010
20090326379HIGH FRAME RATE QUANTITATIVE DOPPLER FLOW IMAGING USING UNFOCUSED TRANSMIT BEAMS - An ultrasound imaging system with pixel oriented processing is provided in which a method of producing a Doppler velocity image is accomplished by emitting unfocused acoustic signals into a medium over substantially an entire field; receiving scattered and reflected ultrasonic signals on a transducer array in response to the emission; processing the received ultrasonic signals to extract information to construct a Doppler velocity signal corresponding to at least one point in the medium; and generating on a display device the Doppler velocity image from the processed Doppler velocity signal. Acquisition sequences and signal processing algorithms are described that provide improved quantification of fluid flow parameters, including improved discrimination between regions of blood flow and tissue. Very high frame rate Spectral Doppler and Vector Doppler acquisition modes for real-time and post-acquisition visualization over a large field of view are described.12-31-2009
20110172540FETAL HEART MONITORING - Fetal heart rate monitoring using ultrasound by means of a transducer in contact with the maternal abdomen. The transducer (07-14-2011
20110172539SYSTEM AND METHOD FOR MODELLING LEFT VENTRICLE OF HEART - The embodiments herein provide a method and a system for modeling left ventricle of heart for echocardiography machines. The method comprising the steps of taking a test case for performing echocardiography by a cardiac machine, obtaining echocardiography data from a plurality of myocardial segments, applying mathematical formulas for assumptions based on blood properties at a myocardial muscle sample and deriving coefficients of algebraic equations of quadratic forms from the mathematical formulas, calculating mathematical behavior of the myocardial muscle sample using the algebraic equations, estimating the left ventricle as a fabricated object using the quadratic forms and deriving a physical and mathematical model for the left ventricle. The echocardiography data of the myocardial muscle sample includes the velocity, displacement, strain rate and strain corresponding to the motion and deformation of the muscle volume sample having attached strain components to each myocardial muscle sample.07-14-2011
20110172538DISPLACEMENT MEASUREMENT METHOD AND APPARATUS, AND ULTRASONIC DIAGNOSTIC APPARATUS - An accurate real-time measurement of a displacement vector is achieved on the basis of the proper beamforming that require a short time for obtaining one echo data frame without suffering affections by a tissue motion. The displacement measurement method includes the steps of: (a) yielding ultrasound echo data frames by scanning an object laterally or elevationally using an ultrasound beam steered electrically and/or mechanically with a single steering angle over an arbitrary three-dimensional orthogonal coordinate system involving existence of three axes of a depth direction, a lateral direction, and an elevational direction; and (b) calculating a displacement vector distribution by implementing a block matching on the predetermined ultrasound echo data frames yielded at more than two phases.07-14-2011
20110046488AUTOMATED MONITORING OF MYOCARDIAL FUNCTION BY ULTRASONIC TRANSDUCERS POSITIONED ON THE HEART - The invention relates to a method and a post-operative care unit for analysing and quantifying an ultrasound tissue Doppler imaging (TDI) signal from a transducer fastened on the myocardium to obtain a parameter indicating regional cardiac ischaemia or correlates with global hypokinetic heart function. This has the advantage over manually operated probes that it can be automated and used continuously over long time. According to the method, a TDI signal trace corresponding to at least one of tissue velocity, strain or strain rate is extracted and correlated with an electrocardiogram to define subsections within a cardiac cycle in the extracted trace corresponding to the early systolic phase and the post-systolic phase. Then, a velocity, strain or strain rate is read in at least the post-systolic phase of the extracted trace, and a parameter which is a function of one of these readings and which indicates ischaemia or global hypokinetic function is generated.02-24-2011
20110245678METHODS AND APPARATUS FOR ULTRASOUND IMAGING - A first ultrasound pulse is applied to biological tissue to create shear waves in the biological tissue, a focused ultrasound pulse is transmitted into the biological tissue, one or more ultrasound signals is received from the biological tissue, and shear waves are detected in the biological tissue based on the received one or more ultrasound signals. At least one propagation property associated with the detected shear waves is determined, and the determined at least one propagation property is displayed.10-06-2011
20100036253SYSTEM AND METHOD FOR MANAGING A PATIENT - A system for managing a patient is disclosed and can include a patient interface adapted to obtain ultrasound information about the patient, a provider interface adapted to facilitate communication between the system and a provider, and a controller in communication with the patient interface and the provider interface, the controller including a clinical management module adapted to receive the ultrasound information and to recommend a clinical management strategy based upon the ultrasound information. A method of presenting a clinical management strategy is also described including obtaining information regarding a condition of a patient, developing a determinant reflecting the condition, and presenting a user with a clinical management strategy on an output device.02-11-2010
20110152688MANUAL ULTRASOUND POWER CONTROL TO MONITOR FETAL HEART RATE DEPENDING ON THE SIZE OF THE PATIENT - A continuous, noninvasive fetal heart rate measurement is produced using one or more ultrasonic transducer adhered to the abdomen of the mother. Each ultrasound transducer generates an ultrasound beam having a signal strength. The signal strength is determined by an excitation voltage applied to the ultrasound transducer. An excitation voltage adjustment device is positioned between an excitation voltage generator and the ultrasound transducer to selectively control the strength of the ultrasound beam. A user input device allows an operator to control the ultrasound signal strength to vary the depth of viewing of the fetal heart rate monitor.06-23-2011
20110054326DIRECT VISUALIZATION CATHETER - An endoscopic device providing direct visualization of a surgical procedure, such as a surgical procedure in which there is significant body and/or artificially introduced fluids is provided. This endoscopic device comprises catheter with a lumen in which a transparent gel may be housed. During the surgical operation the transparent gel may be dispensed at the target site to displace the body fluids, such as blood. A visualization tool housed in the catheter may then be inserted into the gel to allow a surgeon to view the target site through the gel. Additionally, the catheter may comprise a surgical tool(s) that a surgeon may use to perform an operation at the target site. After completion of the operation, the gel and tools may be retracted back into the catheter and removed from the patient's body.03-03-2011
20110263984ADAPTIVE CLUTTER FILTERING IN AN ULTRASOUND SYSTEM - Embodiments for performing clutter filtering in an ultrasound system are disclosed. In one embodiment, an ultrasound data acquisition unit acquires ultrasound data from a target object for color Doppler imaging and a processing unit extracts a plurality of frequency components of the ultrasound data using an autoregressive model and computes a mean frequency component of the plurality of frequency components. The processing unit detects frequency components corresponding to a clutter signal based on the plurality of frequency components and the mean frequency component and performs clutter filtering upon the ultrasound data by using the frequency components corresponding to the clutter signal.10-27-2011
20110118606ADAPTIVELY PERFORMING CLUTTER FILTERING IN AN ULTRASOUND SYSTEM - Embodiments of adaptively performing clutter filtering are disclosed. In one embodiment, by way of non-limiting example, an ultrasound system comprises: an ultrasound data acquisition unit configured to transmit and receive ultrasound signals to and from a target object to output a plurality of ultrasound data corresponding to each pixel of a color Doppler mode image; and a processing unit in communication with the ultrasound data acquisition unit and being configured to calculate a power difference value corresponding to each of the pixels based on the plurality of ultrasound data, determine whether the power difference value is equal to or larger than a first threshold value, and if the power difference value is equal to or larger than the first threshold value, then perform first clutter filtering upon the plurality of ultrasound data, or if the power difference value is less than the first threshold value, then perform second clutter filtering upon the plurality of ultrasound data.05-19-2011
20110125023TRANSTHORACIC PULMONARY DOPPLER ULTRASOUND - Operation of a patient's heart or lungs may be analyzed by transmitting ultrasound energy into the patient's lung, and detecting Doppler shifts of reflected ultrasound induced by moving borders between blood vessels in the lung and air filled alveoli that surround the blood vessels. Movement of the border is caused by pressure waves in the blood vessels that result in changes in diameter of those blood vessels. The detected Doppler shifts are processed with an algorithm designed to increase signal from the moving border with respect to other reflected ultrasound signals and the results are then displayed.05-26-2011
20100191117Method and Device for Controlling Transmission Power of an Active Transducer - A method of operating an ultrasound signal generator includes generating a stimulus signal and receiving a returned signal. The Signal to Noise Ratio (SNR) of the returned signal is computed. The SNR is compared to an optimal SNR range. A control signal is generated to control the transmission power of the stimulus signal. A new stimulus signal is generated at the new transmission power. A device for collecting and analyzing a quasi-periodic signal includes a SNR calculator that computes the SNR of a returned signal. A signal analysis selector selects between a first and a second signal analysis technique. A transmission power controller compares the computed SNR with an optimal SNR range for the selected technique and modifies the transmission power as a result of this comparison.07-29-2010
20100191119MATERNAL AND FETAL MONITOR ULTRASOUND TRANSDUCER - An ultrasound transducer and method of producing same takes advantage of the properties of two differing materials to optimize the transducer. More specifically, the transducer has one or more emitters made of lead zirconate titanate PZT) crystals that are affixed to a wearable material made of polyvinylildene fluoride (PVDF). As such, the PZT crystals are an effective emitter of ultrasound energy into an object and/or area of interest, such as a patient for maternal and/or fetal care monitoring, while the PVDF material has a low impedance and therefore effectively receives the ultrasound energy returned from the object and/or area of interest. The PVDF material comprises a wearable form factor, whereby the transducer utilizes different properties of different materials and combines them into a common transducer.07-29-2010
20090198138Ultrasonic diagnosis apparatus - There is provided first storage means (08-06-2009
20100262008ROBOTIC ULTRASOUND SYSTEM WITH MICROADJUSTMENT AND POSITIONING CONTROL USING FEEDBACK RESPONSIVE TO ACQUIRED IMAGE DATA - An imaging system includes a diagnostic ultrasound front end module, the front end module including a transducer, a robotic armature (10-14-2010
20100022885SWITCHING DC CONVERTING DEVICE AND PORTABLE SYSTEM FOR ULTRASONIC MEDICAL IMAGING AND DIAGNOSING AND METHOD THEREOF - A switching DC converting device includes a switching DC converter and a synchronous clock circuit. The synchronous clock circuit is used to provide a wobbling synchronous clock input for the switching DC converter, and the central frequency of the wobbling synchronous clock avoids the operating frequency of a circuit powered by the switching DC converter.01-28-2010
20100022884SPECTRAL DOPPLER WITH MULTIPLE SPATIALLY DISTINCT GATES - Spatially distinct Spectral Doppler information is displayed. A spectrum is determined for each of a plurality of spatial locations, such as associated with different receive beams. Given a plurality of spectra at different spatial locations, an image may be generated as a function of the spectra. For example, a two-dimensional image has display values for different pixels or locations derived from one or more characteristics of the spectra, such as the maximum velocity with energy above a threshold for each location. As another example, the spectrum from the set of spectra with the highest maximum velocity is selected for generating a spectral strip display.01-28-2010
20090204002Use of signal strength indicator in ultrasound fetal monitors - A method and system for positioning the transducer of a Doppler ultrasound fetal heat rate monitor at an optimum location on the abdomen of the pregnant patient. The method entails using a transducer positioned on the abdomen of a pregnant patient. Use is made of the conventional audio envelope that drives the audio amplifiers of a Doppler ultrasound monitor. That audio envelope is used to determine an average maximum and minimum values of the signal strength over a period of time. Those values establish a full span and can be continuously updated as the monitoring is carried out. The average maximum and minimum strength values are used to create a visual display of a particular set of signals from the patient for use by the caregiver to locate the transducer at a optimum location contacting the skin of the patient in the abdominal area.08-13-2009
20090088640Automated View Classification With Echocardiographic Data For Gate Localization Or Other Purposes - A view represented by echocardiographic data is classified. A probabilistic boosting network is used to classify the view. The probabilistic boosting network may include multiple levels where each level has a multi-class local structure classifier and a plurality of local-structure detectors corresponding to the respective multiple classes. In each level, the local structure is classified as a particular view and then the local structure is detected to determine whether the currently selected local structure corresponds to the class. The view classification may be used to determine gate locations, such as a gate for spectral Doppler analysis.04-02-2009
20120123270DEVICE WITH INTEGRATED ULTRASOUND TRANSDUCERS AND FLOW SENSOR - The invention proposes to equip the tip of a surgical instrument such as a needle or catheter or any other instrument with an ultrasound transducer array to measure flow just in front of the tip by means of time and frequency differences between the sent and received pulses. Since no image is required, only a few transducer elements are required. The transducer elements generate a pressure pulses in specific directions and receives its echo's without the use of imaging techniques and complex driving electronics. Using the frequency shift and time delay of the received signals the proximity and lateral direction of the blood flow may be detected, thus identifying blood vessels.05-17-2012
20100094133ULTRASOUND IMAGING APPARATUS, MEDICAL IMAGE PROCESSING APPARATUS, DISPLAY APPARATUS, AND DISPLAY METHOD - An imaging part scans a predetermined site of a subject to which a contrast agent has been administered, with ultrasound waves, and thereby acquires plural frames of ultrasound image data. A contrast agent inflow detector detects the inflow of the contrast agent into each region based on the signal intensity in each region represented in the plural frames of ultrasound image data. A reference time determining part determines, as a reference time, a time point when the contrast agent inflow detector detects the inflow of the contrast agent into a first region of interest. A color coding part obtains a relative time of the inflow of the contrast agent into each region with reference to the reference time, and generates image data representing the color of each region with a hue corresponding to the relative time. An image based on the image data representing the hue is displayed.04-15-2010
20120316444METHOD AND APPARATUS FOR ULTRASOUND DIAGNOSIS THAT REDUCES INTERFERENCE AND RESTORES MISSED SIGNALS - A method and apparatus for ultrasound diagnosis that reduces interference and restores missed signals, is provided. The method of ultrasound diagnosis includes operations of receiving a Doppler signal having at least one gap; respectively obtaining model parameter sets of first and second Doppler signals by using Doppler signal periods before and after a start of the at least one gap; synthesizing first and second Doppler information by respectively using the model parameter sets of the first and second Doppler signals; and generating Doppler information for the at least one gap by cross-fading the synthesized first and second Doppler information. The apparatus includes a transformer for transforming received I and Q signals into stereo audio signals using a Hilbert transform; and a source separator which removes interference from the stereo audio signals by performing source separation on the stereo audio signals.12-13-2012
20120215110Multiple Beam Spectral Doppler in Medical Diagnostic Ultrasound Imaging - Spatially distinct Spectral Doppler information is acquired. Spatially distinct transmit beams are formed at a same time or in parallel. One or more receive beams are formed in response to each transmit beam, providing samples for a plurality of laterally spaced locations. A spectrum is determined for each of a plurality of spatial locations. In another approach, samples are acquired for different regions at different times. The scanning for each region is interleaved based on the anatomic operation. Since spectral estimation relies on a time-continuous series of transmission and reception, the scanning for a region occurs over a sufficient period for spectral estimation before the scanning for a different region occurs. By using anatomic operation, sufficient time is provided for spectral estimation. Due to anatomic operation, different regions are associated with flow at different times.08-23-2012
20110178406METHODS AND APPARATUS FOR HPRF DOPPLER ULTRASONIC IMAGING - A method for High Pulse Repeat Frequency (HPRF) Doppler ultrasonic imaging comprises: collecting parameters including a selected PRF level, real sample volume depth and sampling gate size; setting a selectable PRF range according to a standard PRF value corresponding to the selected PRF level; evaluating each PRF successively selected from the selectable PRF range with a preset step; and taking the PRF with best evaluation as the best PRF of the selected PRF level to be used in ultrasonic pulses transmission.07-21-2011
20100191118System and Method for Measuring the Instantaneous Period of a Quasi-Periodic Signal - A system for measuring the instantaneous period of a quasi-periodic signal includes a transducer that receives a quasi-periodic signal. A correlation computer cross correlates a template with the received quasi-periodic signal to produce a correlation signal. A peak detector identifies peaks of the correlation signal that exceed a threshold. A template creator averages the portions of the quasi-periodic signal that correspond to the identified peaks in the correlation signal to create a new template. A method of measuring the instantaneous period of a quasi-periodic signal includes determining an initial template, performing a cross-correlation between the initial template and a quasi-periodic signal and selecting portions of the signal that correspond to the peaks of the correlation signal. The selected portions are then averaged and another cross correlation is performed between the quasi-periodic signal and a template including the averaged selected portions. The instantaneous period is then measured from the correlation signal.07-29-2010
20120083699METHOD AND APPARATUS FOR RECOGNIZING MOVING ANATOMICAL STRUCTURES USING ULTRASOUND - A method of recognizing at least one moving anatomical structure using ultrasound data that operates by receiving ultrasound data 100 (100). The ultrasound data comprises Doppler shift information which provides information descriptive of the velocity of at least one anatomical structure. The ultrasound data is first divided into a series of time frames (102). A classification is then assigned to each of the time frames using the Doppler shift information (104). The at least one anatomical structure is then recognized by using the classification of each time frame (106). This is possible, because different anatomical structures produce different patterns in the Doppler shift information.04-05-2012
20120179045Fetal Scalp Doppler Device and System - A fetal pulse monitor includes an ultrasound crystal. An ultrasound controller is electrically connected to the ultrasound crystal and operates the ultrasound crystal to produce ultrasound signals and receive reflected ultrasound signals. A wireless transmitter is electrically connected to the ultrasound controller. A biocompatible housing at least partially surrounds the ultrasound crystal, ultrasound controller, and the wireless transmitter. A system for monitoring fetal heart rate includes a fetal pulse monitor configured for insertion into a womb of a patient and for attachment to a fetus within the womb. The fetal pulse monitor includes an ultrasound crystal, an ultrasound controller electrically connected to the ultrasound crystal, and a wireless transmitter electrically connected to the ultrasound controller. A patient monitoring device is external to the womb and includes a wireless receiver and a processor that detects instantaneous fetal heart rate from the received ultrasound signal. A graphical display is communicatively connected to the patient monitoring device. The graphical display is operated by the patient monitoring device to present the determined fetal heart rate.07-12-2012
20120179046Abdominal Sonar System and Apparatus - An abdominal sonar includes an ultrasound transducer array with a plurality of ultrasound transducers. The abdominal sonar further includes at least one additional ultrasound transducer. A digital signal processor is communicatively connected to the plurality of ultrasound transducers and the at least one additional ultrasound transducer. The digital signal processor individually operates the plurality of ultrasound transducers and the at least one additional ultrasound transducer. The digital signal processor receives reflected ultrasound signals back from each of the plurality of ultrasound transducers and the at least one additional ultrasound transducer and converts the received reflected ultrasound signals into an audio signal. A system for monitoring a pregnancy includes an ultrasound transducer array and at least one additional ultrasound transducer. A digital signal processor is communicatively connected to the ultrasound transducer array and the at least one ultrasound transducer. The digital signal processor converts received raw fetal heart and uterine activity waveforms into an audio signal. A wireless transmitter broadcasts the received audio signal. A wireless receiver receives the broadcast audio signal. A patient monitor extracts the raw fetal heart and uterine activity waveforms from the audio signal and processes the waveforms to obtain an indication of fetal heart rate and an indication of uterine activity.07-12-2012
20120232398WIRELESS FETAL MONITORING SYSTEM - A wireless fetal and maternal monitoring system includes a fetal sensor unit adapted to receive signals indicative of a fetal heartbeat, the sensor optionally utilizing a Doppler ultrasound sensor. A short-range transmission unit sends the signals indicative of fetal heartbeat to a gateway unit, either directly or via an auxiliary communications unit, in which case the electrical coupling between the short-range transmission unit and the auxiliary communications unit is via a wired connection. The system includes a contraction actuator actuatable upon a maternal uterine contraction, which optionally is a EMG sensor. A gateway device provides for data visualization and data securitization. The gateway device provides for remote transmission of information through a data communication network. A server adapted to receive the information from the gateway device serves to store and process the data, and an interface system to permits remote patient monitoring.09-13-2012
20110319765ENERGETIC MODULATION OF NERVES - A system for applying focused ultrasound energy to a nerve surrounding an artery of a patient includes a piezoelectric array comprising a plurality of piezoelectric elements, a controller configured to control at least a subset of the piezoelectric elements so that at least one of the piezoelectric elements in the subset is in a signal transmitting mode, in a signal sensing mode, or both, a first platform on which the piezoelectric elements are coupled and a second platform, wherein the second platform is configured to support at least a part of the patient, a programmable generator configured to generate output power for one or more of the piezoelectric elements, and a programmable processor configured to process a signal sensed by at least one of the piezoelectric elements.12-29-2011
20130018267ELECTRONIC CATHETER STETHOSCOPE - An electronic catheter stethoscope measures and analyzes acoustic fields and dynamic pressure variations in the gaseous or liquid fluid inside a conventional medical catheter that is positioned in a patient's urologic, digestive, reproductive, cardiovascular, neurological or pulmonary system. Measurement transducers are installed in a housing connectable to multiple preselected medical catheters. The transducers detect bodily functions that are transmitted to the preselected catheter from within the body. The transducers, housing, electrical interface and signal processing electronics are positioned outside the body.01-17-2013
20110160591FETAL HEART RATE MONITOR WITH WIDE SEARCH AREA - A continuous, non-invasive fetal heart rate measurement is produced using an ultrasound probe positioned on the abdomen of the mother. The ultrasound probe includes a plurality of ultrasound transducers that are positioned within a housing having a transmission surface. The transmission surface is configured to defocus the individual ultrasound beams created by the plurality of ultrasound transducers. The transmission surface defocuses the ultrasound beam and creates a wider area of coverage for the ultrasound probe. The controller contained within the heart rate monitor selectively activates different combinations of the plurality of ultrasound transducers to reduce the signal-to-noise ratio while allowing the ultrasound probe to locate the fetal heart beat and subsequently increase the signal-to-noise ratio during continuous heart rate monitoring.06-30-2011
20080242995AUTOMATIC OPTIMIZATION IN SPECTRAL DOPPLER ULTRASOUND IMAGING - Methods and systems for automatic optimization in spectral Doppler ultrasound imaging are provided. The value for one or more spectral Doppler parameter is optimized using numerical optimization rather than predefined sampling. Various spectral Doppler parameters are set, such as a position of the gate, gate size, transmit frequency, filter settings, Doppler gain, beamline orientation or angle of intersection between the gate position and the scan line, aperture size, or other spectral Doppler transmit or receive parameters effecting the spectral Doppler imaging. A processor automatically calculates a setting or value for one or more of the spectral Doppler parameters, resulting in more objective optimization than provided by a user setting.10-02-2008
20080242994METHODS AND APPARATUS FOR ULTRASOUND IMAGING - The maximum frequency in a Doppler spectrum is obtained and used as an aliasing detector. When aliasing occurs, frequencies greater than a frequency limit change from one frequency region to another. When aliasing is detected, a zero frequency baseline is shifted to prevent future aliasing.10-02-2008
20080228078ULTRASOUND DIAGNOSTIC SYSTEM AND METHOD FOR DISPLAYING A DOPPLER SPECTRUM IMAGE - The present invention is directed to an ultrasound diagnostic system for displaying an enhanced Doppler spectrum image. The ultrasound diagnostic system includes: a period setting unit operable to set a period for computing spectral Doppler components from ultrasound data obtained by transmitting/receiving ultrasound signals to/from a target object; a Doppler spectrum data acquiring unit operable to compute the spectral Doppler components at the set period from the ultrasound data for acquiring Doppler spectrum data; a storage unit operable to store the acquired Doppler spectrum data; a user input unit operable to receive sweep speed information from a user for selecting a sweep speed; a data adjusting unit operable to compare the set period with the selected sweep speed and adjust the Doppler spectrum data based on the comparison result; and a display unit operable to display a Doppler spectrum image based on the adjusted Doppler spectrum data.09-18-2008
20130178743ULTRASONIC DEVICE AND METHOD OF GENERATING ULTRASONIC IMAGE USING VECTOR DOPPLER - Disclosed is a method for generating an ultrasonic image, the method including: transmitting an ultrasonic signal to a predetermined portion of an object and receiving at least three response signals which are reflected from the predetermined portion; selecting at least two response signals from among the at least three received response signals; and acquiring vector information which indicates a speed and a movement direction of the predetermined portion based on a receiving angle and a Doppler frequency of each of the selected at least two response signals.07-11-2013
20080221451ULTRASONIC DIAGNOSTIC EQUIPMENT AND CONTROL METHOD THEREFOR - Image data of the interior of a sample (S) are sequentially created on the basis of reception signals at the time when ultrasonic waves are transmitted into the sample (S) so as to scan the interior thereof, movements of respective control points set on the image data are tracked so as to evaluate temporal changes of velocities of motions of the sample (S), and differences of timings of the motions in the sample (S) are color-displayed on the basis of the temporal changes of the velocities.09-11-2008
20100280384Clutter Signal Filtering Using Eigenvectors In An Ultrasound System - Embodiments for setting eigenvectors for clutter signal filtering from Doppler signals in an ultrasound system are disclosed. In one embodiment, the ultrasound system includes: a Doppler signal acquisition unit configured to transmit and receive ultrasound signals to and from a target object to acquire first Doppler signals; and a processing unit configured to compute a plurality of eigenvectors by using the first Doppler signals and form second Doppler signals corresponding to directions of the computed eigenvectors, the processing unit being further configured to compute component values of the second Doppler signals and set eigenvectors for clutter signal filtering among the plurality of eigenvectors by using the computed component values.11-04-2010
20130158406FETAL HEART MONITORING RANGE - An approximate distance between an ultrasonic transducer and a fetal heart is determined. A range of distances from the ultrasonic transducer is sensed using the ultrasonic transducer, wherein the range has a minimum distance based upon the approximate distance. A heart rate of the fetal heart is monitored using ultrasonic echo signals from the range.06-20-2013
20110275938ULTRASOUND IMAGING DEVICE AND METHOD FOR CLUTTER FILTERING - An ultrasound imaging device according to exemplary embodiments of the present invention may determine a skewness with respect to an in-phase/quadrature-phase (I/Q) signal in a frequency domain, and may provide a decision logic of a clutter filtering using the skewness. Accordingly, by filtering a clutter signal of the I/Q signal according to the skewness of the I/Q signal, an ultrasonic image may be formed using a signal in which a clutter component is filtered and/or submatrices in which a Doppler component is dominant, and the formed ultrasonic image may be provided to a user.11-10-2011
20130158407MATERNAL CONTRIBUTION DETECTION DURING FETAL HEART MONITORING - A fetal heart signal contribution is determined from an ultra sound signal by suppressing any maternal contribution from the ultrasound signal. The fetal heart signal contribution is canceled or subtracted from the ultrasound signal. An alarm is outputted based upon a result of the cancellation.06-20-2013
20110313292ADAPTIVE CLUTTER FILTERING IN AN ULTRASOUND SYSTEM - Embodiments for adaptively performing clutter filtering upon in an ultrasound system are disclosed. In one embodiment, the ultrasound system includes: an ultrasound data acquisition unit configured to transmit ultrasound signals to a target object and receive ultrasound echoes reflected from the target object to thereby acquire ultrasound data; and a processing unit configured to form a Doppler signal corresponding to each of a plurality of pixels constructing a Doppler mode image based on the ultrasound data, as well as to adjust coefficients of a clutter filter based on characteristics of the Doppler signal for each of the pixels for performing clutter filtering upon the Doppler signal.12-22-2011
20130204138STEERABLE CATHETER NAVIGATION WITH THE USE OF INTERFERENCE ULTRASONOGRAPHY - An acoustically-active catheter (AAC) for use with an ultrasound imaging system and a method for tracking the AAC with respect to anatomic target chosen within a body using the interference ultrasonography. A tip of the AAC is equipped with a crystal transmitting an acoustic wave with parameters similar to those of an acoustic wave generated by a transducer of the imaging system so as to produce acoustic interference the strength of which depends on a position of the AAC tip with respect to at least one Doppler scan plane, formed by the imaging transducer, and a distance from a pulsed-wave Doppler sample that is overlapped with the anatomic target. The ultrasound imaging system detects the interference signal and produces a visual and/or audible interference output that indicates the strength of the acoustic interference. Based on the intensity of the interference output, the user can navigate the AAC tip towards the anatomic target. An anatomic target can be chosen within a cardiovascular system.08-08-2013

Patent applications in class Doppler effect (e.g., fetal HR monitoring)

Patent applications in all subclasses Doppler effect (e.g., fetal HR monitoring)