Abstract: A method for ultrasound flow imaging includes transmitting a set of transmission beams through a region of interest having a plurality of spatial locations. The method further includes generating demodulated data in response to the set of transmission beams. Further, the method includes obtaining a plurality of wave-number vectors and location response data corresponding to each spatial location. Moreover, the method includes determining a plurality of Doppler frequency values based on the location response data and determining a flow vector for each spatial location based on the plurality of Doppler frequency values and the plurality of wave-number vectors. The method also includes generating a flow vector image based on the flow vectors corresponding to the plurality of spatial locations within the region of interest, where the flow vector image is representative of a magnitude and direction of blood flow in the region of interest.

Abstract: Methods, systems and computer program products for nondestructive ultrasound imaging are provided. An example method defines a plurality of subarrays, each comprising a plurality of ultrasound transducer elements. The method transmits a plurality of ultrasound beams from each of the plurality of subarrays, each ultrasound beam being transmitted at a preset beamsteering angle. Subsequent to each transmit, the method receives, at the array, a plurality of ultrasound reflections corresponding to the plurality of ultrasound beams. For each point to be imaged, the method selects one set of received element data for each of the plurality of subarrays. The selected set of element data corresponds to an ultrasound beam having a focal point closest to the point to be imaged. Finally, the method reconstructs a point to be imaged based on the selected received element data, and constructs an ultrasound image by repeating this process for each point to be imaged.

Abstract: A method and system for geolocation using a street light system having transponding technology. A predetermined band of radio frequencies employing spread spectrum technology is used to identify locations relative to an individual street light.

Abstract: Embodiments presented herein describe a method, a system and a computer program product for ultrasound imaging. The method in one example includes receiving a plurality of ultrasound echo signals from a plurality of transducer elements in response to ultrasound transmit beams. The method computes beam sums of ultrasound echo signals originating from a point to be imaged, for the corresponding ultrasound transmit beams. The method generates a time record comprising a plurality of beam sums, wherein the time record includes beam sums corresponding to multiple instants of time in a time window. The method filters the time record based, at least in part, on a predetermined response function. Finally, the method reconstructs the point to be imaged based on one or more of the filtered time records corresponding to one or more of the plurality of ultrasound transmit beams. The method repeats this process for each point to be imaged.

Abstract: Systems and methods for ultrasound beamforming are provided. One method includes obtaining ultrasound data using receive line spacing that changes as a function of depth, determining a number of transmit events to combine at each of a plurality of points for use in combining the obtained ultrasound data, and aligning the ultrasound data with time delays computed from a probe geometry used to obtain the ultrasound data. The method also includes combining the aligned ultrasound data to generate an ultrasound image.

Abstract: Systems and methods for communicating ultrasound data are provided. One method includes monitoring over time estimates of bandwidth of a channel communicatively coupling an imaging location with another location remote from the imaging location and communicating the estimates to a system at the imaging location. The method also includes identifying at least one of a region-of-interest (ROI) mask or one or more transmission parameters for the channel and adjusting at least one of the ROI mask or the one or more transmission parameters based on the monitored estimates of the bandwidth for communicating the medical images.

Abstract: A method and system for geolocation using a street light system having transponding technology. A predetermined band of radio frequencies employing spread spectrum technology is used to identify locations relative to an individual street light.

Abstract: Systems and methods for ultrasound beamforming are provided. One method includes obtaining ultrasound data using receive line spacing that changes as a function of depth, determining a number of transmit events to combine at each of a plurality of points for use in combining the obtained ultrasound data, and aligning the ultrasound data with time delays computed from a probe geometry used to obtain the ultrasound data. The method also includes combining the aligned ultrasound data to generate an ultrasound image.

Abstract: Systems and methods for communicating ultrasound data are provided. One method includes monitoring over time estimates of bandwidth of a channel communicatively coupling an imaging location with another location remote from the imaging location and communicating the estimates to a system at the imaging location. The method also includes identifying at least one of a region-of-interest (ROI) mask or one or more transmission parameters for the channel and adjusting at least one of the ROI mask or the one or more transmission parameters based on the monitored estimates of the bandwidth for communicating the medical images.

Abstract: A method for continuous non-invasive monitoring of multiple arterial parameters of a patient is provided. The method includes continuously acquiring ultrasound data via an ultrasound transducer attached to the patient for detecting a blood vessel using color flow processing within a monitoring scan plane. Further, the method includes processing the continuously acquired ultrasound data to generate continuous quantitative waveforms based on an estimated cross-sectional area of the blood vessel and an estimated volumetric flow rate of blood through the vessel and displaying the generated continuous quantitative waveforms for monitoring the arterial parameters of the patient in real-time.

Abstract: Systems and methods are presented for increasing the frame rate of real-time 3D ultrasound imaging. In one embodiment, the frame rate for generating a pseudo-shaded 2D projection image may be increased by controlling the image reconstruction process. Rather than beamforming, scan converting, and interpolating a 3D voxelized data set of an entire scanned volume, only samples required for generating the 2D projection image may be reconstructed. The element data measured from each transducer array element may be combined to directly reconstruct those 3D image samples required by the volume rendering algorithm to generate the 2D projection image.

Abstract: A method for producing a three-dimensional image (70) of an object. The method includes providing a model (8) of the object (62) (200), insonifying regions of the object from source transducers (58) external to the object (62) (202), receiving return echoes from the object (62) at receiving transducers (58) external to the object (62), processing the return echoes (204) and generating a hybrid image (70) of the object (62) comprising object regions responsive to the model (8) of the object (62) and object regions responsive to the return echoes (208/212).

Abstract: Embodiments presented herein describe a method, a system and a computer program product for ultrasound imaging. The method in one example includes receiving a plurality of ultrasound echo signals from a plurality of transducer elements in response to ultrasound transmit beams. The method computes beam sums of ultrasound echo signals originating from a point to be imaged, for the corresponding ultrasound transmit beams. The method generates a time record comprising a plurality of beam sums, wherein the time record includes beam sums corresponding to multiple instants of time in a time window. The method filters the time record based, at least in part, on a predetermined response function. Finally, the method reconstructs the point to be imaged based on one or more of the filtered time records corresponding to one or more of the plurality of ultrasound transmit beams. The method repeats this process for each point to be imaged.

Abstract: A technique is provided for computing or monitoring blood viscosity. The technique includes measuring a cross sectional area of a arterial segment and a volumetric flow rate of blood flowing through the arterial segment at two or more locations, estimating a compliance transfer function from blood measurements to scale the arterial cross sectional area into a pressure waveform, deriving a transmission line model of the arterial segment based on the cross sectional area, as scaled by the compliance transfer function, of the arterial segment at the two or more locations and the volumetric flow rate of blood at the two or more locations. The technique also includes computing the blood viscosity based on the transmission line model.

Abstract: A system for controlling a swarm that includes a plurality of autonomous objects may include a processing system and a controller. The processing system may compute the primitives to be applied to each pair of objects in the swarm, and may combine the primitives to generate higher-level primitives. The processing system may generate a graph of the computed primitives, and identify the cliques in the graph. The controller may cause the primitives to be applied between each pair of objects in the swarm, and cause each object to maximize its respective set of primitives so as to induce the desired group behavior. The controller may detect the desired group behavior in the swarm by monitoring the primitives computed by the processing system and the cliques identified by the processing system.

Abstract: Methods and systems and computer program products for reusing radio resources in a medical telemetry networks are provided. The method receives at a server, traffic information for a plurality of mobile transceivers, from a plurality of distributed receivers. The method identifies time slot assignments and frequency channel assignments of the plurality of mobile transceivers based on traffic information. The method then updates one or more time slot assignments and/or one or more frequency channel assignments based, at least in part, on traffic information. Finally, the method broadcasts updated instances of the time slot assignments and updated instances of frequency channel assignments.

Abstract: Methods, systems and computer program products for nondestructive ultrasound imaging are provided. An example method defines a plurality of subarrays, each comprising a plurality of ultrasound transducer elements. The method transmits a plurality of ultrasound beams from each of the plurality of subarrays, each ultrasound beam being transmitted at a preset beamsteering angle. Subsequent to each transmit, the method receives, at the array, a plurality of ultrasound reflections corresponding to the plurality of ultrasound beams. For each point to be imaged, the method selects one set of received element data for each of the plurality of subarrays. The selected set of element data corresponds to an ultrasound beam having a focal point closest to the point to be imaged. Finally, the method reconstructs a point to be imaged based on the selected received element data, and constructs an ultrasound image by repeating this process for each point to be imaged.

Abstract: A method for continuous non-invasive monitoring of multiple arterial parameters of a patient is provided. The method includes continuously acquiring ultrasound data via an ultrasound transducer attached to the patient for detecting a blood vessel using color flow processing within a monitoring scan plane. Further, the method includes processing the continuously acquired ultrasound data to generate continuous quantitative waveforms based on an estimated cross-sectional area of the blood vessel and an estimated volumetric flow rate of blood through the vessel and displaying the generated continuous quantitative waveforms for monitoring the arterial parameters of the patient in real-time.

Abstract: An imaging system includes a platform having mounted thereon an imaging device. The imaging device includes a first detector and a second detector. The imaging system includes a mask having a first pattern of apertures therein, the mask positioned on a first side of the first detector, an anti-mask having a second pattern of apertures therein, wherein the second pattern is derived from the first pattern, the anti-mask positioned on a first side of the second detector, and a computer configured to acquire a plurality of mask datasets and anti-mask datasets of a gamma source, add one of the mask datasets and subtract its respective anti-mask dataset to create a far-field dataset, adjust the far-field image dataset, reconstruct a near-field image of the source using the far-field dataset, and apply an expectation maximization (EM) algorithm to one of the far-field image dataset and the near-field image to enhance contrast.

Abstract: Systems and methods are presented for increasing the frame rate of real-time 3D ultrasound imaging. In one embodiment, the frame rate for generating a pseudo-shaded 2D projection image may be increased by controlling the image reconstruction process. Rather than beamforming, scan converting, and interpolating a 3D voxelized data set of an entire scanned volume, only samples required for generating the 2D projection image may be reconstructed. The element data measured from each transducer array element may be combined to directly reconstruct those 3D image samples required by the volume rendering algorithm to generate the 2D projection image.