| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 600455000 | Pulse Doppler | 25 |
| 20080242997 | METHOD AND APPARATUS FOR CLASSIFYING GASEOUS AND NON-GASEOUS OBJECTS - Ultrasonic pulse echo object classification is described. A broadband ultrasound transducer transmits a broadband ultrasound pulse towards the object and detecting an associated ultra sound echo of that pulse from the object. An ultrasound receiver receives the detected echo signal. A signal processor, coupled to the ultrasound receivers determines and analyzes a time duration parameter and a frequency parameter (and possibly one or more other parameters like amplitude and/or phase) of the detected echo signal and classifies the object as a solid or liquid or as gaseous based on the parameters of the detected echo signal. | 10-02-2008 |
| 20080269612 | ULTRASOUND DIAGNOSTIC APPARATUS - A transmission wave corresponding to an FM continuous wave having been subjected to an FM modulation processing is transmitted from a transmitting transducer | 10-30-2008 |
| 20080306386 | ULTRASONIC DIAGNOSTIC APPARATUS AND METHOD OF MEASURING VELOCITY WITH ULTRASONIC WAVES - A multiple ultrasonic beam is transmitted from an ultrasonic probe, and a velocity of blood flow, azimuth and elevation angle of a sample such as a blood flow are acquired by a three-dimensional information acquisition section, as three-dimensional fluid information in a range gate, based on a Doppler signal output from the ultrasonic probe. | 12-11-2008 |
| 20080312534 | System and method for power management in a telemetric monitoring system - An implantable, multichannel pulsed-Doppler biotelemetry system is described that uses novel power management techniques to minimize power consumption to very low levels, thus, making such system suitable for long term implantation. A first power management technique described in this invention is implemented as a Closed-loop Doppler flowmeter hardware with adjustable pulse repetition rate (PRF) circuits based on a feedback circuit. Another power management technique used in the system described in this invention is implemented as a PRF-synchronized ultrasonic transducer excitation power supply. Finally, another power management technique is implemented as an adaptive sub-sampling multiplexing that enables multiple channels of flow measurement using only a single flowmeter and acquires the blood flow signal at significantly lower rates than typical Doppler flowmeters. When these techniques are incorporated in a miniature Doppler flowmeter circuit, the result is a system capable of substantial power reduction that enables this system to be used as a long-term implant. | 12-18-2008 |
| 20090018449 | Ultrasonic Method and Apparatus for Measuring or Detecting Flow Behavior of a Non-Sinusoidal Periodicity - A method and apparatus for automated detection of a general, non-sinusoidal type of periodicity in ultrasound Doppler signals from pulsatile blood flow is described. The method computes a pulsation index, which is a sum of the normalized powers of the fundamental and several harmonic components in the frequency spectrum of the banded Doppler signal. A weighting function may be applied to the power from each harmonic component in order to suppress contributions due to spurious peaks, as in the case when pulsatile flow is absent. | 01-15-2009 |
| 20090043208 | METHODS AND DEVICES FOR ESTIMATING BLOOD FLOW CHARACTERISTICS - Methods and devices are described for estimating blood flow characteristics through an orifice of a subject, such as regurgitant blood flow through a faulty heart valve. Acoustical techniques can be applied to send bursts of energy, such as high repetition pulsed ultrasonic signals, to a sample volume in a region of interest. For example, multiple beams can be formed from the bursts of energy each having a cross sectional area that is smaller than the cross sectional area of the orifice being investigated. By combining the multiple beams, a composite measure of the blood flow characteristics through the orifice can be obtained. In one example, the composite measure can provide an estimate of the cross sectional area of the interrogated orifice. The composite measure can also provide an estimate of the geometry of the orifice. Systems and components for providing such composite measures are also disclosed. | 02-12-2009 |
| 20090062654 | METHOD AND APPARATUS FOR AUTOMATIC OPTIMIZATION OF DOPPLER IMAGING PARAMETERS - A method and apparatus are disclosed for automatic optimization of Doppler imaging parameters. The method includes obtaining and storing at least two characteristic spectral lines at a predetermined pulse repetition frequency. The method further includes optimizing at least one of the Doppler imaging parameters based on the stored at least two characteristic spectral lines and a predetermined mean noise power. In one embodiment, the characteristic spectral lines are obtained by collecting in real time the Doppler spectral lines generated at the predetermined pulse repetition frequency within a predetermined time period, and processing the collected Doppler spectral lines in real time without storing them. | 03-05-2009 |
| 20090088641 | ULTRASONIC IMAGING APPARATUS AND A METHOD FOR GENERATING AN ULTRASONIC IMAGE - A scanner transmits and receives ultrasonic waves at a specified pulse repetition frequency (PRF). A storage stores received signals acquired through the transmission and reception. A calculator generates a Doppler spectrum image by executing frequency analysis on the received signals. A display displays the Doppler spectrum image. When a desired Doppler velocity range for the displayed Doppler spectrum image is inputted, a processor reads out the received signals from the storage, and executes a resampling process on the read-out received signals at a sampling frequency corresponding to the desired Doppler velocity range. The calculator generates a new Doppler spectrum image by executing frequency analysis corresponding to the desired Doppler velocity range on the received signals having been subjected to the resampling process by the processor. The display displays the new Doppler spectrum image. | 04-02-2009 |
| 20090177091 | VELOCITY MEASURING METHOD AND VELOCITY MEASURING DEVICE USING THE SAME - The present invention is to provide a velocity measuring method and a velocity measuring device for carrying out the method. The velocity measuring method includes: a step (S | 07-09-2009 |
| 20090182236 | Noise Reduction And Aliasing Compensation In A Doppler Mode Image - The present invention relates to an ultrasound system and a method of forming a Doppler mode image. The ultrasound system comprises a transmission/reception unit operable to transmit/receive ultrasound signals at a pulse repetition frequency (PRF) to form an n number of Doppler signals. The ultrasound system further comprises a signal processing unit. The signal processing unit computes a first mean frequency based on an n | 07-16-2009 |
| 20090209861 | Ultrasonic Doppler Blood Flow Meter - An ultrasonic Doppler blood flow meter has a clutter component estimation unit | 08-20-2009 |
| 20090264762 | ENHANCED INTRALUMINAL FLOW MEASUREMENT METHOD 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 |
| 20090264763 | ENHANCED INTRALUMINAL FLOW MEASUREMENT METHOD USING PULSED 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 |
| 20100130866 | Method for determining flow and flow volume through a vessel - A method for measuring and displaying flow and flow volume in the vessel of a subject. The method includes acquiring ultrasound data from a subject and producing a color Doppler m-mode image depicting the vessel. A 3D representation of the color Doppler m-mode image is then generated to enable an operator to identify the blood vessel and window the ultrasound data accordingly to a selected range of heart beats. Blood vessel walls are automatically identified from the windowed ultrasound data and blood flow through the vessel lumen is measured using pulsed Doppler ultrasound, which is gated to substantially exclude data from outside the lumen. Volume flow through the vessel is determined by multiplying the measured blood flow with a calculated cross-sectional area of the vessel and an image indicative of the volume is then generated and displayed. | 05-27-2010 |
| 20100262009 | Method and apparatus for enhancing the detecting and tracking of moving objects using ultrasound - An ultrasonic pulse echo apparatus detects an object that is moving with respect to stationary objects. An ultrasonic transducer transmits a series of ultrasound pulses in a direction that intersects a path of the moving object. An ultrasound receiver receives a series of lines of echoes from objects in the field of view of the ultrasonic signal. Each echo line corresponds to one of the ultrasonic pulses. A signal processor processes the echo lines from the moving object. The echo lines are time shifted by different amounts and combined at different time shifts to produce different composite lines. The composite line having an optimal signal-to-noise ratio is selected. Other signal processing enhancements are performed. | 10-14-2010 |
| 20100274134 | METHOD FOR EVALUATION OF RENAL VASCULAR PERFUSION USING POWER DOPPLER ULTRASONOGRAPHY - A method for evaluation of renal perfusion with power Doppler ultrasonography is disclosed in the present invention. Serial renal vascular images at different vascular areas including the whole vascular tree, interlobar, arcuate, and interlobular vessels were captured. Imaging processing software was designed to analyze the changes of power Doppler intensity of colored pixels within regions of interest (ROI). Power Doppler Vascularity index (PDVI) has been defined as the percentage of vascular perfusion within a region of interest (ROI). The renal vascular perfusion index (RVPI) is defined as the maximal power Doppler vascular index divided by minimal power Doppler vascular index (PDVI | 10-28-2010 |
| 20120179047 | METHOD AND APPARATUS FOR AUTOMATIC OPTIMIZATION OF DOPPLER IMAGING PARAMETERS - A method and apparatus are disclosed for automatic optimization of Doppler imaging parameters. The method includes obtaining and storing at least two characteristic spectral lines at a predetermined pulse repetition frequency. The method further includes optimizing at least one of the Doppler imaging parameters based on the stored at least two characteristic spectral lines and a predetermined mean noise power. In one embodiment, the characteristic spectral lines are obtained by collecting in real time the Doppler spectral lines generated at the predetermined pulse repetition frequency within a predetermined time period, and processing the collected Doppler spectral lines in real time without storing them. | 07-12-2012 |
| 20120265076 | MICROFABRICATED CARDIAC SENSOR WITH TACTILE FEEDBACK AND METHOD AND APPARATUS FOR CALIBRATING THE SAME USING A PLURALITY OF SIGNALS - The cross-correlation of corresponding signals facilitates the development of sensor nanotechnologies including a catheter for performing ablation of cardiac arrhythmias and a biocompatible electrical interface with monitoring capabilities. Cross-correlation of data acquired with differing techniques enables system calibration and design, as well as, validation of the data acquired with next generation sensors. In a preferred mode of the invention, novel cardiac nanosensors enable an operator to differentiate one individual patient's cardiac tissue mechanical properties from others by using a sense of touch much as clinicians today use auditory cues with a stethoscope. | 10-18-2012 |
| 20120302889 | INTEGRATED WIRELESS NON-INVASIVE PERFUSION SENSOR - A system and associated method provide tissue perfusion monitoring in a patient. A laser Doppler unit is provided including a coherent laser light source and a photodetector. A processor is configured to receive a signal from the photodetector and determine a tissue perfusion measurement from a Doppler-shifted component of the photodetector signal. A wireless communication circuit transmits the tissue perfusion measurement. A power source provides power to the laser Doppler unit, the processor and the communication circuit. A wireless housing encloses the laser Doppler unit, the processor, the power source and the communication circuit. | 11-29-2012 |
| 20130018268 | Scanning Speed Detection for Freehand High Frequency Ultrasound Transducers - Scanning speed detection for freehand high frequency ultrasound transducers using a multiple element moving array transducer using a pair of elements as a Doppler scanning speed detector. Various aspects of the invention are disclosed. | 01-17-2013 |
| 20140194740 | Emboli detection in the brain using a transcranial doppler photoacoustic device capable of vasculature and perfusion measurement - A device, method, and system for detecting emboli in the brain is disclosed. A transcranial Doppler photoacoustic device transmits a first energy to a region of interest at an internal site of a subject to produce an image and blood flow velocities of a region of interest by outputting an optical excitation energy to said region of interest and heating said region, causing a transient thermoelastic expansion and produce a wideband ultrasonic emission. Detectors receive the wideband ultrasonic emission and then generate an image of said region of interest from said wideband ultrasonic emission. A Doppler ultrasound signal will also be deployed to image the region of interest. Doppler presents changes in velocity to map blood flow. Additionally, a dye can be given to visualize the brain vasculature and a perfusion measurement can be made in various regions of the brain along with the transcranial Doppler and the photoacoustic screening. Systems are taught using resultory medical data for better triage within an enhanced stroke ecosystem. | 07-10-2014 |
| 20150141832 | Apparatus for ultrasound flow vector imaging and methods thereof - Apparatus and methods of use are provided for complex flow imaging and analysis that is non-invasive, accurate, and time-resolved. It is particularly useful in imaging of vascular flow with spatiotemporal fluctuations. This apparatus is an ultrasound-based framework called vector projectile imaging (VPI) that can dynamically render complex flow patterns over an imaging view at millisecond time resolution. The VPI apparatus and methods comprise: (i) high-frame-rate broad-view data acquisition (based on steered plane wave firings); (ii) flow vector estimation derived from multi-angle Doppler analysis (coupled with data regularization and least-squares fitting); and (iii) dynamic visualization of color-encoded vector projectiles (with flow speckles displayed as adjunct). | 05-21-2015 |
| 20150320395 | ULTRASONIC DIAGNOSTIC APPARATUS, IMAGE PROCESSING APPARATUS, AND IMAGE PROCESSING METHOD - An ultrasonic diagnostic apparatus according to one embodiment includes correlation matrix calculating circuitry, calculating circuitry, image generating circuitry, and controlling circuitry. The correlation matrix calculating circuitry calculates a correlation matrix of a scanned region consisting of a plurality of scan lines, from a data array of pieces of reflection wave data collected from the same position by transmitting and receiving ultrasonic waves in the scanned region across a plurality of frames. The calculating circuitry calculates a filter coefficient for suppressing a clutter generated by a tissue, by performing principal component analysis using the correlation matrix, and by performing a matrix operation of approximating a clutter component as a principal component and of suppressing the clutter component. The image generating circuitry generates ultrasound image data from blood flow information estimated using the filter coefficient. The controlling circuitry causes a display to display the ultrasound image data. | 11-12-2015 |
| 20160007951 | VELOCITY ESTIMATION FOR VECTOR FLOW IMAGING (VFI) IN ULTRASOUND | 01-14-2016 |
| 600456000 | With volumetric measurement | 1 |
| 20160000403 | Method and Apparatus for Monitoring Cardiac Output - A new method of measuring the cardiac output is disclosed. The new method uses an ultrasound emitter and one or more receivers placed in the superior vena cava just above the right atrium of the heart so that the ultrasound apparatus can transmit through the wall of the superior vena cava and the juxtaposed wall of the aorta at this location. By measuring the velocity of the blood by its back-scattered Doppler shift, the cardiac output can be determined. The volume of blood flow can also be determined by measuring the diameter of the aorta. | 01-07-2016 |
