Abstract:
In one aspect, the invention relates to an ultrasound imaging system that includes an ultrasound receiver configured to receive ultrasound signals scattered from a sample in real time; an acoustic beam former; and an ultrasound data demodulation system. In one embodiment, the ultrasound imaging system further includes a processing system configured to process demodulated scan data and perform ultrasound image generation and flow processing and a display configured to show ultrasound image data and blood flow velocity data relative to such image data. Signals that include positive flow information and negative flow information are separated from received signals using phase-filters and analytic signal transforms such that a first and a second autocorrelation signal processing stage is used to generate mean positive flow, mean negative flow, and variance data for such flows.
Abstract:
An ultrasonic image scanning system for scanning an organic object includes a container for containing a coupling medium for transmitting an ultrasonic signal to the organic object disposed therein whereby a simultaneous multiple direction scanning process may be carried out without physically contacting the organic object. The ultrasonic image scanning system further includes ultrasound transducers for transmitting the ultrasonic signal to the organic object through the coupling medium without asserting an image deforming pressure to the organic object. These transducers distributed substantially around a two-dimensional perimeter of the container and substantially at symmetrical angular positions at approximately equal divisions of 360 degrees over a two-dimensional perimeter of the container. The transducers are further movable over a vertical direction alone sidewalls of the container for a real time three dimensional (3D) image data acquisition. The container further includes sidewalls covered with a baffle layer for reducing an acoustic reverberation.
Abstract:
In an embodiment, there is an apparatus for facilitating ultrasound medical image acquisition. There is a guide to help guide an ultrasound probe during a scanning operation. The guide resists at least some undesired movement of the ultrasound probe. The at least some undesired movement is otherwise possible, without the guide, under freehand probing. In another embodiment, there is a method for facilitating ultrasound image acquisition. The method includes providing a guide; guiding an ultrasound probe during a scanning operation using the guide, including resisting at least some undesired movement of the ultrasound probe; wherein the at least some undesired movement is otherwise possible, without the guide, under freehand probing. The guide and guiding are especially beneficial for three-dimensional or panoramic ultrasound imaging.
Abstract:
An instrument guide is described for mounting an invasive instrument such as a biopsy needle to an imaging probe, controlling its position, monitoring its position, and/or predictively displaying its position on a user display of the medical imaging system. A plurality of substantially rigid segments are hingeably connected to the probe, to an instrument handle, and to each other such that movement of the biopsy needle is restricted to within the imaged plane. However, substantial freedom of movement within the imaged plane is provided such that the instrument may be inserted into the patient over a wide range of angles. In one preferred embodiment, angle detectors are provided at each segment intersection and measurements provided for computing and displaying the instrument position and orientation on the user display. The instrument guide/position monitor is preferably made with low-cost components such that it is disposable after a single use. A predictive user display is provided in which the throw of a spring-loaded instrument is shown on the user display, the throw corresponding to the space that the instrument will occupy after a spring trigger is activated.
Abstract:
An architecture and protocol are provided for allowing flexible, low cost, and upgradable ultrasound information processing systems. Ultrasound information processing functions are performed by a plurality of ultrasound modules coupled to a high-speed, multiple-drop serial ultrasound information bus. The ultrasound information bus is used for packetized data transfer among the ultrasound modules in accordance with an ultrasound information exchange protocol. Additional or upgraded ultrasound modules are designed to connect to the ultrasound information bus and to communicate using the ultrasound information exchange protocol. Thus, according to a preferred embodiment, as improvements in hardware technology or software algorithms are made, additional or upgraded ultrasound modules are simply “plugged in” to the ultrasound information bus, hereby reducing costs and increasing system versatility and upgradability.
Abstract:
An extended view ultrasound imaging system in which a position sensor is used to detect the location and orientation of a ultrasound transducer for each scan frame as the ultrasound transducer is swept across the surface of a target. The contents of the successive scan frames, together with their location and orientation information, are processed to generate an extended view ultrasound image of the target region. An output array representing the extended view image is first initialized, and then successively updated as each scan frame is received. In a preferred embodiment, an alpha-blending algorithm is used to combine the information in the current scan frame with previous output array values to generate the current output array values. Because the content of the successive image frames is not relied upon to piece them together, system processing requirements are substantially reduced and the output image is robust against increased transducer speed, bumps in the transducer path, and departures of the transducer from a common plane. In an additional preferred embodiment, the alpha-blending weighting factor can be user-adjustable and/or can be dynamically adjusted on a per-location basis based on acoustic reflectivity, edge motion, or other factors. Also in an additional preferred embodiment, the amount of departure from a common plane during the movement of the transducer across the target can be displayed to the user for assistance in interpreting the extended view image.
Abstract:
In one aspect the invention relates to a shear wave generator. The shear wave generator includes a first piezoelectric element having a first polarity in electrical communication with a first electrode; a second piezoelectric element having a second polarity in electrical communication with a second electrode, wherein the second polarity is an inverse of the first polarity; a boundary layer disposed behind both the first piezoelectric element and the second piezoelectric element; and an excitation signal generator in electrical communication with the first electrode and the second electrode, wherein the first piezoelectric element vibrates in a first direction and the second piezoelectric element vibrates in a second direction in response to an excitation signal. In one embodiment, the piezoelectric elements are disposed within an ultrasound imaging probe.
Abstract:
In one embodiment of the invention, there is an ultrasound processing system that communicates images over a single asynchronous serial channel according to a scheme that does not require an isochronous serial channel and that switches among ultrasound imaging modes robustly. For example, the system is configured to packetize ultrasound image data of at least one ultrasound imaging mode into a stream of data frames and to convey the stream of data frames via the asynchronous channel. Each data frame includes indication of the ultrasound imaging mode and includes ultrasound-imaging-mode-specific imaging parameters. Other embodiments exist.
Abstract:
A method for generating a dedicated M beam profile which allows the user to offset the beam origin or steering angle for the cardiology application; display the M line with or without the B mode on the screen; and the M line does not use any of the same beam profile from B line, or is created out of the acquired B lines as a virtual M line.
Abstract:
An ultrasonic image scanning system for scanning an organic object includes a beam former that provides a phase velocity adjustment function for producing an ultrasonic image with a programmable phase velocity. The ultrasonic image scanning system further includes a beam profile analysis function for calculating an optimal phase velocity with a user controller to adjust the phase velocity until a scan image of best image quality is achieved. Alternately, the system may provide an automatic phase velocity-scanning controller for automatically scanning through a range of phase velocities and selecting a best phase velocity generating a scanning image of a best quality. The system further includes a region of interest (ROI) controller for a user to select a region for scanning with a specific focal area for optimizing the phase velocity. The system may further provide a maximum gradient analyzer for selecting an image of a best quality in optimizing the phase velocity. A digital controller may also provide a real time programmable control by applying different control algorithms with combination of phase velocity and attenuation adjustment. A hardness computational processor is implemented to determine a tissue hardness using the phase velocity and in combination with the attenuation parameter.