Patent application number | Description | Published |
20080302187 | Vibroacoustic System for Vibration Testing - Forces are applied to a device under test and its mechanical response is measured by a laser vibrometer ( | 12-11-2008 |
20100010346 | System and Method For Non-Invasively Measuring Tissue Viscoelasticity Using Surface Waves - A system and method for assessing tissue health based on the viscoelastic properties of the tissue. Surface waves are induced in the tissue and their propagation characteristics are then measured. The tissue viscoelastic properties are then determined from the surface wave measurements using a surface model. | 01-14-2010 |
20110063950 | VIBRATION GENERATION AND DETECTION IN SHEAR WAVE DISPERSION ULTRASOUND VIBROMETRY WITH LARGE BACKGROUND MOTIONS - A method for measuring a mechanical property of a subject includes using an ultrasonic transducer to apply ultrasonic vibration pulses to a vibration origin in the subject in an on-off time sequence in order to impart a harmonic motion at a prescribed frequency to the subject, and when the vibration pulses are off, preferably using the same transducer to apply ultrasonic detection pulses to a motion detection point and to receive echo signals therefrom in order to sense the harmonic motion on the subject at the motion detection point The ultrasonic detection pulses are interspersed with the vibration pulses and can be applied in a non-uniform manner From the received ultrasonic echo signals, a harmonic signal is detected and a characteristic such as amplitude or phase of the detected harmonic signal is calculated using a Kalman filter or interpolation. | 03-17-2011 |
20110263978 | Method for Shear Wave Ultrasound Vibrometry with Interleaved Push and Detection Pulses - A shear wave dispersion ultrasound vibrometry (“SDUV”) method for measuring a mechanical property of a subject is provided. Particularly, a set of ultrasonic vibration tone bursts is applied to a vibration origin in the subject so that harmonic vibratory motion is imparted to a tissue of interest. The set of vibration tone bursts effectively act like a single vibration pulse that imparts vibratory motion at larger amplitudes than achievable with a single pulse. Multiple ultrasonic detection pulses are then applied to two or more locations in the tissue of interest in order to measure shear waves propagating outward from the vibration origin. From these measurements, phase or amplitude information related to the shear wave propagation is determined and used to calculate a shear wave speed. Using the shear wave speed information, mechanical properties of the tissue are calculated. | 10-27-2011 |
20110319756 | Method for Ultrasound Vibrometry Using Orthogonal Basis Functions - A method for measuring a mechanical property of a subject includes using an ultrasound transducer to apply ultrasonic vibration pulses to a location in a subject in order to induce shear waves at multiple prescribed orthogonal frequencies in the subject. The ultrasound transducer is directed by an excitation signal that is composed of multiple orthogonal basis functions, each having a given frequency component corresponding to the prescribed orthogonal frequencies. The power level of each orthogonal basis function is independently adjustable. The excitation signal can be sparsely sampled, or portions of the excitation signal can be removed in order to improve tissue vibration and to provide for the interleaving ultrasonic vibration and detection pulses. Ultrasonic detection pulses are applied to at least one motion detection point, from which echo signals are received. From the received echo signals, a motion signal is determined, from which mechanical properties of the subject are calculated. | 12-29-2011 |
20120226158 | System and Method for Correcting Errors in Shear Wave Measurements Arising From Ultrasound Beam Geometry - A system and method for measuring mechanical properties of a tissue using an ultrasound system is provided. Ultrasound energy is applied to the tissue using the ultrasound system in order to produce shear waves that propagate in the tissue. Measurement data are then acquired by directing ultrasound detection pulses into the tissue. Information about the intensity field of the ultrasound energy used to produce the shear waves is obtained and used to produce a correction factor. This correction factor is applied to the measurement data to correct the measurement data for errors arising from the geometry of the ultrasound energy used to produce the shear waves. From the corrected measurement data, mechanical properties of the tissue are calculated. | 09-06-2012 |
20130237821 | System and Method for Model-Independent Quantification of Tissue Viscoelastic Properties Using Ultrasound - A model-independent method for producing a viscoelastic tissue property metric using ultrasound is provided. A mechanical stress, such as an acoustic force, is applied to a tissue using an ultrasound system and tissue displacement resulting from the applied acoustic force is measured. From the tissue displacement measurements, a complex modulus, such as a relative complex modulus, is extracted. A loss tangent is calculated from the extracted complex modulus. Using the calculated loss tangent, viscoelastic tissue property metrics may be calculated. | 09-12-2013 |
20140018679 | GENERATION AND ASSESSMENT OF SHEAR WAVES IN ELASTICITY IMAGING - A method for generation and analysis of shear waves in a subject with an ultrasound system. Multiple short ultrasound push pulses are applied, as a set and optionally more than once, to one or more push origins at the subject to produce first and second shear waves of large amplitudes and desired spatial distributions, which are separated in space and time and which have opposite polarity such that initial movements of the subject tissue, respectively caused by the first and second shear waves, occur in opposite directions. At least one mechanical property of the subject (including that represented by shear wave group velocity, phase velocity, and attenuation of a shear wave) is determined based at least in part on a distance between wavefronts of the first and second shear waves. | 01-16-2014 |
20140046173 | ULTRASOUND VIBROMETRY WITH UNFOCUSED ULTRASOUND - Methods for measuring mechanical properties of an object or subject under examination with an ultrasound system and using unfocused ultrasound energy are provided. Shear waves that propagate in the object or subject are produced by applying unfocused ultrasound energy to the object or subject, and measurement data is acquired by applying focused or unfocused ultrasound energy to at least one location in the object or subject at which shear waves are present Mechanical properties are then calculated from the acquired measurement data. | 02-13-2014 |
20140081136 | SYSTEM AND METHOD FOR NON-INVASIVE MEASUREMENT OF CARPAL TUNNEL PRESSURE - Method and system for non-invasive determination of a pressure characteristic associated with carpal tunnel (CT) region of a subject. Speed of a shear wave induced in the tissue of the subject and propagating through the CT region is measured at least once. The pressure characteristic is substantially proportional to determined speed. | 03-20-2014 |
20150216507 | SYSTEM AND METHOD FOR SHEAR WAVE ELASTOGRAPHY BY TRANSMITTING ULTRASOUND WITH SUBGROUPS OF ULTRASOUND TRANDUCER ELEMENTS - Systems and methods for performing shear wave elastography using push and/or detection ultrasound beams that are generated by subsets of the available number of transducer elements in an ultrasound transducer. These techniques provide several advantages over currently available approaches to shear wave elastography, including the ability to use a standard, low frame rate ultrasound imaging system and the ability to measure shear wave speed throughout the entire field-of-view rather than only those regions where the push beams are not generated. | 08-06-2015 |
20150265249 | SYSTEM AND METHOD FOR SHEAR WAVE GENERATION WITH STEERED ULTRASOUND PUSH BEAMS - A system and method for performing a steered push beam (SPB) technique to create multiple foci generated by the interference of different ultrasound push beams to create shear waves and, based thereon, generate a report indicating mechanical properties about an object. | 09-24-2015 |
20150305719 | SHEAR WAVE ATTENUATION FROM K-SPACE ANALYSIS SYSTEM - The present invention provides a system and method for ultrasound processes using wave attenuation derived from k-space analysis by analyzing spatial frequency domain data. | 10-29-2015 |
Patent application number | Description | Published |
20080246492 | Processing tantalum capacitors on assembled PWAs to yield low failure rate - A method of conditioning tantalum capacitors on printed wire assemblies is disclosed. According to the method, each of the capacitors on an assembly is subjected to the same conditioning level during testing. To condition the tantalum capacitors, surge currents are induced in the capacitors in a controlled manner as a means of aging the capacitors so that they can be used without de-rating rating with low failure rates. The level of voltage, timing and current levels are set by circuitry used to perform the testing. The same circuits that are used with the capacitors in a system application are also used for the tantalum capacitor test circuit during the conditioning process. | 10-09-2008 |
20140015571 | SYSTEMS AND METHODS FOR REGULATING SEMICONDUCTOR DEVICES - A system for regulating semiconductor devices may include a current regulator configured to regulate one or more currents provided to an insulated gate bipolar transistor (IGBT). The current regulator may regulate the currents by generating a current profile based at least in part on a collector voltage value associated with the IGBT, a rate of collector voltage change value associated with the IGBT, or any combination thereof The current profile may include one or more current values to be provided to a gate of the IGBT such that the current values are configured to limit the rate of collector voltage change to a first value. The current regulator may then send the one or more current values to a current source configured to supply the gate of the IGBT with one or more currents that correspond to the one or more current values. | 01-16-2014 |
20140097886 | SYSTEMS, METHODS, AND APPARATUS FOR CONTROLLING POWER SEMICONDUCTOR DEVICES - Systems, methods, and apparatus for controlling power semiconductor devices are described. According to one embodiment of the disclosure, there is disclosed a system. The system may include at least one power source for selectively providing power to one or more power semiconductor devices controlled by a gate driver. The gate driver may include at least one controller coupled to at least one power semiconductor device interface via a first channel and a second channel configured to provide galvanic isolation of information communicated between the controller and the at least one power semiconductor device interface. | 04-10-2014 |
20150084337 | SYSTEM AND METHOD FOR CONTROLLING SWITCHING ELEMENTS WITHIN A SINGLE-PHASE BRIDGE CIRCUIT - In one aspect, a method for controlling the operation of switching elements contained within a single-phase bridge circuit of a power convertor may include monitoring gate voltages of a first switching element and a second switching element of the single-phase bridge circuit and controlling the first and second switching elements so that each switching element is alternated between an activated state and a deactivated state. In addition, the method may include transmitting a gating command signal to adjust the first switching element from the deactivated state to the activated state when: a first gate drive command is received that is associated with switching the first switching element to the activated state; a second gate drive command is received that is associated with switching the second switching element to the deactivated state; and the gate voltage of the second switching element is less than a predetermined voltage threshold. | 03-26-2015 |
20150235757 | SYSTEM AND METHOD FOR REDUCING PARTIAL DISCHARGE IN HIGH VOLTAGE PLANAR TRANSFORMERS - A device includes a printed circuit board (PCB). The device may also include a high voltage coil disposed on the PCB and a low voltage coil disposed on the PCB. Further, a conductive shield forms a three-dimensional enclosure around the high voltage coil and confines an electric field generated by the device to the PCB. | 08-20-2015 |
Patent application number | Description | Published |
20100036110 | METHODS AND COMPOSITIONS FOR CONTINUOUS SINGLE-MOLECULE NUCLEIC ACID SEQUENCING BY SYNTHESIS WITH FLUOROGENIC NUCLEOTIDES - The invention features compositions, methods, and systems for single-molecule sequencing of nucleic acids based on the continuous measurement of the incorporation of fluorogenic nucleotides in microreactors. In particular, the invention features fluorogenic compounds for use in nucleic acid sequencing. The invention provides numerous advantages over previous systems such as unambiguous determination of sequence, continuous sequencing, long read lengths, low overall cost, and ease of sample preparation. | 02-11-2010 |
20100227327 | METHODS AND COMPOSITIONS FOR CONTINUOUS SINGLE-MOLECULE NUCLEIC ACID SEQUENCING BY SYNTHESIS WITH FLUOROGENIC NUCLEOTIDES - Disclosed herein are methods and compositions for continuous single-molecule nucleic acid sequencing by synthesis with fluorogenic nucleotides. | 09-09-2010 |
20130053252 | NUCLEIC ACID AMPLIFICATION AND SEQUENCING BY SYNTHESIS WITH FLUOROGENIC NUCLEOTIDES - In general, the invention features methods and systems for sequencing of nucleic acids based on the measurement of the incorporation of fluorogenic nucleotides in microreactors. The invention provides numerous advantages over previous systems such as unambiguous determination of sequence, fast cycle time, long read lengths, low overall cost of reagents, low instrument cost, and high throughput. The invention also features methods and kits for nucleic acid amplification. The amplification and sequencing aspects of the invention may or may not be employed in conjunction with one another. The invention also features fluorogenic nucleotides that may be used in the sequencing methods of the invention. | 02-28-2013 |