| Patent application number | Description | Published |
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| 20100056897 | System For Non-Uniform Image Scanning and Acquisition - A system employs non-uniform and nonlinear patient monitoring signals in automatically adaptively varying image resolution, image scanning frequency and acquisition speed and gates and synchronizes the image scanning and acquisition of an imaging system. A system acquires medical images of patient anatomy using a trigger generator. The trigger generator generates a trigger signal comprising a non-periodic sequence of pulses in a first signal portion within individual heart beat cycles. The first signal portion is periodically repeated for multiple sequential individual heart beat cycles. An image acquisition device acquires multiple images of a patient anatomical portion in response to corresponding multiple individual pulses of the non-periodic sequence of pulses. A display processor presents acquired images on a display for review by a user. | 03-04-2010 |
| 20100060350 | Adaptive Filtering System for Patient Signal Monitoring - A system provides a high quality, and intuitive multi-band filter that adapts when noise frequencies or noise amplitudes change. A system for adaptively filtering patient monitoring signals, comprises a filter controller for adaptively determining the number of, and individual filter bandwidth of, multiple adaptive signal filters to be used in filtering multiple bandwidths within an encompassing signal filtering bandwidth. The filter controller does this in response to, (a) noise data indicating noise source frequencies and (b) configuration data determining medical signal or noise source characteristics, to provide programming data for programming a plurality of adaptive signal filters. The system includes multiple adaptive signal filters individually having a filtering bandwidth and filtering characteristic programmable in response to received programming data. A noise detector automatically identifies a noise component in a received patient monitoring signal and generates the noise data. | 03-11-2010 |
| 20100081917 | SYSTEM FOR MULTI-DIMENSIONAL ANATOMICAL FUNCTIONAL IMAGING - A cardiac functional analysis system reconstructs a 3D anatomical image volume using image frames acquired at predetermined cardiac phases over multiple cardiac cycles in response to a trigger derived from hemodynamic signals. A medical imaging system generates 3D anatomical imaging volume datasets from acquired 2D anatomical images. The system includes an image acquisition device for acquiring 2D anatomical images of a portion of patient anatomy in selectable angularly variable imaging planes in response to a synchronization signal derived from a patient blood flow related parameter. A synchronization processor provides the synchronization signal derived from the patient blood flow related parameter. An image processor processes 2D images acquired by the image acquisition device of the portion of patient anatomy in multiple different imaging planes having relative angular separation, to provide a 3D image reconstruction of the portion of patient anatomy. | 04-01-2010 |
| 20100097259 | SYSTEM FOR PROCESSING PATIENT MONITORING SIGNALS - A patient monitoring signal processing system adaptively varies medical signal data rate. The system uses an analog to digital converter for digitizing an analog cyclically varying input signal derived from a patient in response to a sampling clock input. The sampling clock determines frequency of analog to digital sampling of the analog input signal by the analog to digital converter. A detector detects first and second different signal portions within a cycle of the cyclically varying input signal. A control processor coupled to the analog to digital converter and the detector, provides the sampling clock and adaptively determines first and second different frequencies of the sampling clock to be used in sampling within detected corresponding first and second different signal portions of the cyclically varying input signal in response to predetermined information indicating a frequency of a signal component of the cyclically varying input signal in the first signal portion is higher than a frequency of a signal component of the cyclically varying input signal in the second signal portion. Also the first frequency is higher than the second frequency of the first and second different frequencies. | 04-22-2010 |
| 20100152598 | System for Heart Performance Characterization and Abnormality Detection - A system for heart performance characterization and abnormality detection, includes an acquisition device for acquiring an electrophysiological signal representing a heart beat cycle of a patient heart. A detector detects multiple parameters of the electrophysiological signal comprising at least one of, (a) amplitude, (b) time duration, (c) frequency and (d) time-frequency, representative parameters. A signal analyzer calculates at least one ratio of the detected parameters from ratios including, (i) ratio of T wave amplitude to P wave amplitude, (ii) ratio of time duration of ST wave to time duration of PR wave, (iii) ratio of a frequency of a PR wave to a frequency of a RT wave and (iv) ratio of a time-frequency measure of a PR wave to a time-frequency measure of a RT wave. A comparator determines whether a calculated ratio exceeds a predetermined upper limit threshold or a predetermined lower limit threshold. An output processor generates data representing an alert message in response to the calculated ratio exceeding a predetermined threshold. | 06-17-2010 |
| 20100185084 | Non-invasive Cardiac Characteristic Determination System - A system uses non-invasive laser, ultrasound or electro-magnetic monitoring, to derive CO/SV, CO/SV deviation, and related cardiac function parameters. The non-invasive system determines cardiac stroke volume and includes an input processor for receiving determined values provided using a measurement processor. The determined values comprise, a blood vessel internal diameter and rate of flow of blood through the blood vessel in a heart cycle. A computation processor calculates a vessel stroke volume comprising volume of blood transferred through the blood vessel in a heart cycle using the measured blood vessel internal diameter and the rate of flow of blood. The computation processor determines cardiac stroke volume by determining a factor for use in adjusting the vessel stroke volume to provide a cardiac stroke volume and adjusting the vessel stroke volume using the determined factor to provide the cardiac stroke volume. An output processor provides data representing the determined cardiac stroke volume to a destination. | 07-22-2010 |
| 20100204585 | System for Heart Performance Characterization and Abnormality Detection - A system for heart performance characterization receives an electrical signal indicating heart electrical activity of a patient over a heart beat cycle. The electrical signal is acquired at a particular anatomical location. A gating signal generator generates a gating signal for use in identifying a particular portion of the heart beat cycle. An acquisition device, responsive to the gating signal, derives first and second voltage potentials from the received electrical signal. The first voltage potential comprises a voltage potential derived over a time period comprising a heart beat cycle and the second voltage potential comprises a voltage potential derived over a time period comprising a particular portion of the heart beat cycle. A computation processor derives a dynamic impedance representative value by adjusting a baseline impedance value by a ratio of the first and second voltage potentials. The dynamic impedance represents an average impedance at the particular anatomical location over a time period comprising the particular portion of the heart beat cycle. | 08-12-2010 |
| 20100210945 | System for Cardiac Ultrasound Image Acquisition - An ultrasound image acquisition device initiates acquisition of anatomical images of a portion of patient anatomy in response to a heart rate related synchronization signal. The ultrasound image acquisition device includes multiple ultrasound transducers for generating sound waves. The ultrasound transducers are arranged in different transducer groups oriented to enable acquisition of different ultrasound imaging information used in generating a single composite ultrasound image. A synchronization processor derives the heart rate related synchronization signal from a patient cardiac function blood flow related parameter. The synchronization signal enables adaptive activation of a particular group of the different transducer groups for acquisition of ultrasound imaging information used in generating the single composite ultrasound image. A display processor presents the single composite ultrasound image, acquired by the ultrasound image acquisition device, to a user on a reproduction device. | 08-19-2010 |
| 20100280396 | System for Cardiac Pathology Detection and Characterization - A system for heart performance characterization and abnormality detection includes an interface for receiving an electrical signal comprising a pressure indicative waveform indicating a heart blood pressure of a patient over a heart beat cycle. A timing detector determines multiple different time periods in at least one heart cycle from the pressure indicative waveform. A patient monitor monitors the multiple different time periods and in response to detection of a variation in at least one of the multiple different time periods exceeding a predetermined threshold or range, generates an alert message associated with the variation. | 11-04-2010 |
| 20100312125 | System for Cardiac Pathology Detection and Characterization - A system for heart performance characterization and abnormality detection includes an interface for receiving digitized electrical signals representing blood pressure waveforms over one or more heart beat cycles. The digitized electrical signals comprise, a first digital data sequence representing normal blood pressure of a patient, a second digital data sequence representing random blood pressure of a normal patient and a third digital data sequence representing a potentially abnormal blood pressure of a patient. A complexity processor calculates first, second and third complexity indices for the corresponding first, second and third digital data sequences respectively. A correlation processor uses the calculated first, second and third complexity indices to calculate one or more measures indicating deviation of the potentially abnormal blood pressure of the patient from a normal value. | 12-09-2010 |
| 20110015532 | Denoising and Artifact Rejection For Cardiac Signal in a Sensis System - A system denoises and rejects artifacts from cardiac signals, by accepting a cardiac signal from a patient, processing the cardiac signal from the patient using a frequency band width controllable choke to separate the cardiac signal into predefined frequencies, filtering each of the predefined frequencies to remove dynamic common noise, joining each of the predefined frequencies into a cardiac signal without the dynamic common noise, and providing feedback control of the filtering of each of the predefined frequencies. | 01-20-2011 |
| 20110028856 | System for Heart Performance Characterization and Abnormality Detection - A system improves analysis, diagnosis and characterization of cardiac function signals (including surface ECG signals and intra-cardiac electrograms) based on cardiac electrophysiological activity momentum computation, characterization and mapping. The system calculates an electrophysiological signal momentum of different portions of cardiac signals including a timing, location and severity of cardiac pathology and improves reliability of diagnosis, detection, mapping to an identified medical condition, and characterization. The system improves identification of cardiac disorders, differentiation of cardiac arrhythmias, characterization of pathological severity, prediction of life-threatening events and supports evaluation of drug administration effects. | 02-03-2011 |
| 20110054335 | System for Cardiac Pathology Detection and Characterization - A system improves characterization and diagnosis of cardiac electrophysiological activities by analyzing and characterizing cardiac function signals (including surface ECG signals and intra-cardiac electrograms) based on cardiac electrophysiological energy mode and pattern identification and mapping. The system accurately determines a time stamp, location and severity of cardiac pathology and clinical events by calculating a cardiac signal energy mode and energy variation and distribution. The system identifies cardiac disorders, differentiates cardiac arrhythmias, characterizes pathological severity, predicts life-threatening events, and supports evaluation of administration of drugs. | 03-03-2011 |
| 20110087121 | System for Continuous cardiac pathology detection and characterization - A system determines fractal values, a nonlinear fractal ratio and fractal data patterns in a heart and maps determined fractal values to medical conditions. A system for heart performance characterization and abnormality detection includes an interface for receiving sampled data representing an electrical signal indicating electrical activity of a patient heart over at least one heart beat cycle. A signal processor calculates, a first signal characteristic value comprising a first fractal dimension value derived from the sampled data over at least a portion of a heart beat cycle, a second signal characteristic value representing a computed derivative of the first fractal dimension value and a ratio of the first and second signal characteristic values. A comparator compares the calculated ratio with a threshold value to provide a comparison indicator. A patient monitor, in response to the comparison indicator indicating the calculated signal characteristic value exceeds the threshold value, generates an alert message associated with the threshold. | 04-14-2011 |
| 20110118590 | System For Continuous Cardiac Imaging And Mapping - A system improves precision and reliability of intra-cardiac catheter position tracking and monitoring. An interventional system for internal anatomical examination includes a catheterization device for internal anatomical insertion. The catheterization device includes, at least one magnetic field sensor for generating an electrical signal in response to rotational movement of the at least one sensor about an axis through the catheterization device within a magnetic field applied externally to patient anatomy and a signal interface for buffering the electrical signal for further processing. A signal processor processes the buffered electrical signal to derive a signal indicative of angle of rotation of the catheterization device relative to a reference. The angle of rotation is about an axis through the catheterization device. A reproduction device presents a user with data indicating the angle of rotation of the catheterization device. | 05-19-2011 |
| 20110166618 | System for Cardiac Arrhythmia Detection - A system for heart performance characterization and abnormality detection includes an interface for receiving sampled data representing an electrical signal indicating electrical activity of a patient heart over multiple heart beat cycles and for receiving a pace signal indicating occurrence of a heart pace pulse applied to the heart. A signal processor uses the received sampled data and pace signal in calculating, a first signal characteristic value comprising a time interval between occurrence of the pace pulse and a cardiac cycle characteristic and a second signal characteristic comprising an average of the time intervals determined over a multiple heart cycles. A comparator compares at least one of the first and second characteristic values with a threshold value to provide a comparison indicator. A patient monitor generates an alert message associated with the threshold in response to the comparison indicator indicating a calculated signal characteristic value exceeds the threshold value. | 07-07-2011 |
