204 results about "Two dimensional ultrasound" patented technology

Disclosed are an optical navigation positioning system based on CT (computed tomography) registration results and a navigation method thereby. The system comprises a preoperative CT image guide input module, an image segmentation module, a body surface initial-registration module, a preoperative CT image and intraoperative two-dimensional ultrasound image module and an intraoperative navigation module. By combining virtual reality and intraoperative ultrasound, intraoperative positioning errors caused by factors such as breathing are compensated, and accordingly a target point for coronary artery bypass grafting is accurately positioned and navigated. Cardiac and coronary vessel tree in preoperative cardiac CT image data is manually segmented and reconstructed, an augmented virtual reality environment integrating endoscope and virtual endoscope is built by the aid of optical navigation apparatus and CT-ultrasound-based intraoperative registration error correction, and accordingly the target point of coronary artery bypass grafting is accurately positioned and navigated.

A two-dimensional ultrasound phased array transducer includes an acoustic backing, a first circuit, which may be a flexible circuit disposed over the acoustic backing or a ground plane, an acoustically absorptive interface layer disposed over the flexible circuit, and a piezoelectric layer disposed over the interface layer. A matching layer may be disposed over the piezoelectric layer, and a second circuit, which may be a ground plane or a flexible circuit, may be disposed over the matching layer. The piezoelectric layer and the matching layer are diced by forming kerfs extending through these layers and at least partially into the interface layer. Extending the kerfs into the interface layer reduces cross-talk between elements, electrically isolates the elements, and facilitates manufacturing by reducing the precision required in controlling the depth of the cut. The acoustically absorptive interface layer may have acoustic properties similar to the backing material and may be formed of the same material as the backing material. Electrical interconnection between the piezoelectric elements and the first circuit is provided through the interface layer. The electrical connection may be formed by laser drilled vias in the interface layer, coated with gold or another suitable material.

The invention relates to an ultrasonic imaging system for elasticity measurement. The ultrasonic imaging system comprises a probe, an ultrasonic imaging device, a controlling and processing device and a display device, wherein the probe comprises a low-frequency oscillation driving device for generating oscillation and forming a shearing wave propagating from human body surface to tissues, and an ultrasonic transducer array for sending an ultrasonic signal to the tissues and receiving an ultrasonic echo signal; the ultrasonic imaging device is used for driving the ultrasonic transducer array to send the ultrasonic signal and receive and process the ultrasonic echo signal according to loaded imaging parameters; the controlling and processing device is used for controlling the low-frequency oscillation driving device and the ultrasonic imaging device to process the ultrasonic echo signal so as to obtain a two-dimensional ultrasonic image and elasticity information of the tissues; and the display device is used for displaying the two-dimensional ultrasonic image and the elasticity information. The system and elasticity measuring method can simultaneously obtain the two-dimensional ultrasonic image and the elasticity information of the tissues, thereby improving clinical diagnosis accuracy; and the probe can realize precise positioning under the guiding of the two-dimensional ultrasonic image without considering displacement compensation, thereby improving convenience and accuracy of tissue elasticity measurement.

A system and method for aligning the position of a target within a body of a patient to a predetermined position used in the development of a radiation treatment plan can include an ultrasound probe used for generating live ultrasound images, a position sensing system for indicating the position of the ultrasound probe with respect to the radiation therapy device, and a computer system. The computer system is used to display the live ultrasound images of a target in association with representations of the radiation treatment plan, to align the displayed representations of the radiation treatment plan with the displayed live ultrasound images, to capture and store at least two two-dimensional ultrasound images of the target overlaid with the aligned representations of the treatment plan data, and to determine the difference between the location of the target in the ultrasound images and the location of the target in the representations of the radiation treatment plan.

A system and method for aligning the position of a target within a body of a patient to a predetermined position used in the development of a radiation treatment plan can include an ultrasound probe used for generating live ultrasound images, a position sensing system for indicating the position of the ultrasound probe with respect to the radiation therapy device, and a computer system. The computer system is used to display the live ultrasound images of a target in association with representations of the radiation treatment plan, to align the displayed representations of the radiation treatment plan with the displayed live ultrasound images, to capture and store at least two two-dimensional ultrasound images of the target overlaid with the aligned representations of the treatment plan data, and to determine the difference between the location of the target in the ultrasound images and the location of the target in the representations of the radiation treatment plan.

Segmenting the prostate boundary is essential in determining the dose plan needed for a successful bracytherapy procedure—an effective and commonly used treatment for prostate cancer. However, manual segmentation is time consuming and can introduce inter and intra-operator variability. This present invention describes an algorithm for segmenting the prostate from two dimensional ultrasound (2D US) images, which can be full-automatic, with some assumptions of image acquisition. Segmentation begins with the user assuming the center of the prostate to be at the center of the image for the fully-automatic version. The image is then filtered to identify prostate edge candidates. The next step removes most of the false edges and keeps as many true edges as possible. Then, domain knowledge is used to remove any prostate boundary candidates that are probably false edge pixels. The image is then scanned along radial lines and only the first-detected boundary candidates are kept the final step includes the removal of some remaining false edge pixels by fitting a polynomial to the image points and removing the point with the maximum distance from the fit. The resulting candidate edges form an initial model that is then deformed using the Discrete Dynamic Contour (DDC) model to obtain a closed contour of the prostate boundary.

The invention provides an intraoperative tissue tracking method combined with a preoperative image, which comprises the following sequential steps: the first step: preoperative preparation, including the steps of acquiring a space position of a marking point in the preoperative image and calibration of equipment; and the second step: deformation tracking of an intraoperative tissue, including 1, coordinate system registration which is one of main parts of the invention; and 2. tissue deformation and fusion display which is also one of the main parts of the invention. By using intraoperative real-time two-dimensional ultrasound image and endoscope image and intraoperative electromagnetic or optical positioning system and using algorithm analysis and geometric registration calculation, a tissue structure of an intraoperative interest tissue can be reflected in the image.

A compact ultrasound needle guidance system and method of use is described. The needle guidance system has components to adjustably target a needle's destination in the plane of a two-dimensional ultrasound image before insertion of a needle into a patient. Needle movement is tracked using a position detector that provides a visual display of the needle path on the ultrasonic image.

Systems and methods for performing robotically-assisted surgical procedures on a patient enable an image display device to provide an operator with auxiliary information related to the surgical procedure, in addition to providing an image of the surgical site itself. The systems and methods allow an operator to selectively access and reference auxiliary information on the image display device during the performance of a surgical procedure.

The invention discloses a two-dimensional ultrasound vibration platform and relates to the technical field of non-traditional machining. The two-dimensional ultrasound vibration platform aims at solving the problems that cutting force is large and a tool is worn badly when a common micro milling machine is used for machining hard and brittle materials. The two-dimensional ultrasound vibration platform comprises a bearing plate, an upper vibrating plate, a lower vibrating plate, linear moving guide rails, bow spring pieces, fine adjusting devices, an ultrasonic power supply, ultrasonic amplitude transformers and ultrasonic transducers. The bottom of the bearing plate is directly fixed to a platform of a machine tool through bolts. The lower vibrating plate is mounted on the bearing plate. The middle of one side of the upper vibrating plate and the middle of one side of the lower vibrating plate are each connected with a vibrator. The bow spring pieces are arranged in the middles of the other sides of the vibrating plates. The two ends of each bow spring piece are fixed to the output end of the corresponding fine adjusting device. The amplitude transformers and the transducers are connected through threads to form the vibrators. According to the two-dimensional ultrasound vibration platform, the vibrators produce ultrasonic vibration to drive the upper vibrating plate and the lower vibrating plate to vibrate, different motion tracks can be coupled out according to different demands, and the two-dimensional ultrasound vibration platform is high in transportability and suitable for being popularized in vibration milling or other vibration screening fields.

A method and apparatus for three-dimensional visualization and analysis for automatic non-destructive examination of a solid Rotor using ultrasonic phased array is disclosed. Data is acquired by scanning a solid rotor with a phased array ultrasound transducer producing a plurality of two dimensional ultrasound scans. Each of a plurality of sample points of a plurality of two dimensional ultrasound scans are associated with a corresponding 3D image point of a regular grid. A kernel function for each of the plurality of sample points defining a size and shape of a kernel located at the corresponding image point is determined. A weight is assigned to each kernel which, in one embodiment, is based on the sample point value. A value for each image point of the regular 3D grid is determined based on kernels overlapping each image point. A three-dimensional volume representing the solid rotor is then visualized.

A device is configured for interrogating a blood vessel to derive flow characteristics (S628) and for, responsive to the deriving and based on the derived characteristics, anatomically identifying the vessel. A spatial map of the vessels may be generated based on the interrogating, and specifically the Doppler power computed from data acquired in the interrogating. Subsequent interrogating (S668) may occur, based on the map and on a user-selected set of vessels and / or vessel categories, to derive clinical Doppler indices. The device can be designed to automatically set a sample volume (509) for the subsequent interrogating, and to operate automatically from the user selection to display of the indices. The display may further include an image (524) of the vessels summoned by the set, annotated by their individual anatomical names, and optionally a diagnosis relating to blood flow. The displayed image may be enlarged to zoom in on the user's onscreen selection. The device may feature a two-dimensional ultrasound non-phased array of transducer elements.

According to some embodiments of the invention, an ultrasound imaging system having real-time tracking and image registration includes a fiducial-marker system comprising an ultrasound transmitter structured to provide a localized ultrasound pulse at an optically observable localized spot on a body of interest. The system further includes an optical imaging system, a two-dimensional ultrasound imaging system, an optical image processing system, and an ultrasound image processing system The ultrasound imaging system further includes a registration system configured to communicate with the optical image processing system and the ultrasound image processing system to receive information, the registration system being further configured to determine a coordinate transformation that registers the optical image with the two-dimensional ultrasound image based at least partially on information concerning the spatial locations determined for the combined ultrasound and optical fiducial marker observed in the optical image and in the two-dimensional ultrasound image.

The invention relates to the field of medicine, and in particular relates to an ultrasonic probe calibration device and an ultrasonic probe calibration method based on optical positioning. The ultrasonic probe calibration device based on optical positioning is composed of a visual tracking device, an ultrasonic collecting device, a calibrator and a computer, wherein a tracking identification Marker 1 is fixed on an ultrasonic probe; the calibrator is a water tank with a plurality of trustums of different heights on the bottom, and one side of the calibrator is provided with a tracking identification Marker 2. An ultrasonic probe calibration method based on optical positioning comprises the following steps: segmenting a calibrator ultrasonic image collected by the ultrasonic probe, extracting the bottom picture contour of the calibrator, synchronously acquiring the coordinates of the Marker 1 and Marker 2 and the related position relation according to the visual tracking device, establishing the spatial position relation between the ultrasonic image and visual sense, and carrying out point cloud registration by adopting a coincidence point shift algorithm, and thus the coordinate transformation from the ultrasonic image pixel points to the three-dimensional space is realized. With the device and the method, the transformation precision from two-dimensional ultrasonic image information to three-dimensional space can be improved, and a basis is provided for the surgical navigation system based on the ultrasonic image.

A scanning assembly for a dual-modality automated biological tissue imaging device having first and second compression surfaces is provided. The system comprises a housing defining a scanning / compression surface, an ultrasonic transducer mounted within the housing adjacent the scanning surface for movement in a plane parallel to the scanning surface and imaging the tissue through the scanning surface, an X-ray detector mounted within the housing for forming an X-ray image of the tissue based on X-ray radiation passed through the tissue and scanning surface from an X-ray source, and a drive for moving the transducer across the scanning surface so that the transducer generates a plurality of two-dimensional ultrasound tissue images. The housing is hermetically sealed and filled with non-conductive fluid with acoustic impedance resembling that of the tissue. The scanning surface has acoustic impedance resembling that of the tissue and can substantially withstand compression forces applied to the tissue.

The invention discloses ultrasonic micro grinding and processing equipment and a technology thereof. The equipment comprises a vibration isolation operating table, wherein columns which are in left-right symmetric arrangement are fixed on the vibration isolation operating table, the columns are connected via a beam, a main shaft component which drives a grinding device to rotate at a high speed is arranged on the beam, an ultrasonic vibration platform is arranged below the main shaft component, and the ultrasonic vibration platform is a two-dimensional ultrasonic vibration platform which is driven by a piezoelectric stack actuator and takes a polar coordinate system as an operating coordinate system. According to the single-drive polar coordinate two-dimensional ultrasonic micro grinding and processing equipment, provided by the invention, during processing, the piezoelectric stack actuator is selected for replacing the existing common ultrasonic amplitude transformer as a driving source, amplitude and frequency can be adjusted, and at the same time, the structure of the ultrasonic vibration platform is greatly simplified; besides, multiple grinding modes, such as dry grinding, wet grinding, peripheral grinding, face grinding and the like, are provided, and processing effects are better; after the ultrasonic micro grinding and processing equipment is used for processing workpieces, the processing is simpler and more diversified, and the precision of processed workpieces is higher.

An ultrasound based technique for detecting and imaging vibrations in tissue caused by eddies produced during bleeding through punctured arteries or from organs. A clutter signal, normally suppressed in conventional color flow imaging, is employed to detect and characterize local tissue vibrations, to detect internal bleeding in an image, or as an audible or palpable signal, or a readout. Using a tissue vibration image, the origin and extent of vibrations relative to the underlying anatomy and blood flow can be visualized in real time, enabling measurements of vibration amplitude, frequency, and spatial distribution. Bleeding rate can be determined from the frequency and amplitude of the vibrations. Signal processing algorithms usable to identify tissue vibrations from an ensemble of 2D ultrasound data include those based on phase decomposition, spectral estimation using eigendecomposition, and spectral estimation using autoregressive modeling for isolating vibrations from clutter, blood flow, and noise.

An ultrasound probe and a method for manufacturing the same are provided. More particularly, a one-dimensional or two-dimensional ultrasound probe having a multi-element-type piezoelectric material is easily manufactured by inserting a flat wire in a backing material, wherein the flat wire is used as a signal cable to supply electrical signals, enabling easy and simple arrangement of piezoelectric units as well as the signal cable.

The invention relates to the technical field of image processing, in particular to a fetus head full-automatic segmentation method based on three-dimensional ultrasound, which comprises the followingsteps of firstly, carrying out data enhancement on a three-dimensional ultrasound volume data set of a fetus head to obtain an enhanced data set; inputting the enhanced data set into a full convolutional neural network, and training a model in an end-to-end volume mapping manner to realize pre-segmentation of the data set; and finally, carrying out iterative optimization processing on a pre-segmentation result by adopting a cascade full convolutional neural network based on an automatic context to obtain a final segmentation result. The invention aims to overcome a plurality of defects in fetal head measurement by the existing two-dimensional ultrasound, so that the subsequent diagnosis efficiency of doctors is improved, and more other prenatal studies are promoted.

The invention provides a three-dimensional spiral line grinding method through ultrasonic vibration, which is applicable to high-efficiency precision machining of difficult-to-cut materials. Two-dimensional ultrasonic vibration is applied to a workpiece in the axial direction of a grinding wheel and in the radial direction of the grinding wheel on a common grinder by an ultrasonic transducer, so that the workpiece is in ultrasonic elliptic vibration. As the grinding direction is perpendicular to a plane of ultrasonic elliptic vibration, cutting tracks of abrasive particles relative to the workpiece are three-dimensional spiral lines. The tracks of the abrasive particles on the surface of the workpiece interfere with each other by the aid of the ultrasonic vibration in the axial direction of the grinding wheel, so that roughness is reduced. Besides, the maximum cutting depth of the abrasive particles is increased by the aid of the ultrasonic vibration in the radial direction of the grinding wheel, and the abrasive particles function in intermittent cutting, so that grinding force is reduced, and material removing rate is increased. The method can be used for improving machining surface quality, decreasing surface damage and improving production efficiency, thereby being applicable to high-efficiency precision machining of the difficult-to-cut materials.

Disclosed is a three-dimensional ultrasound image method and apparatus for reducing distortions of ultrasound images by precisely estimating a distance between consecutive two-dimensional frames obtained by a manual scanning. The apparatus comprises a transducer array for transmitting ultrasound signals to a target object and receiving echo signals reflected from the target object; a receive-focusing unit for receive-focusing the echo signals to generate a plurality of consecutive two-dimensional ultrasound image frames; a converter for converting the consecutive two-dimensional ultrasound image frames into a three-dimensional ultrasound image; and a display for displaying the three-dimensional ultrasound image. The method comprises the steps of, a) transmitting and receiving ultrasound signals; b) receive-focusing echo signals to generate a plurality of consecutive two-dimensional ultrasound image frames; c) converting the consecutive two-dimensional ultrasound image frames into a three-dimensional ultrasound image; and d) displaying the three-dimensional ultrasound image.

A system and method for performing registration of a bone structure to align a computerized model of the bone structure with the detected surface of the actual bone structure utilizes a two-dimensional ultrasound array. The array is positioned in a manner such that the position of the array is known relative to the actual bone structure. The array is phased to produce a point-focused beam of acoustic energy which is scanned in three dimensions throughout the volume of interest to map the surface of the bone structure.

A method for controlling an ultrasound imaging system includes defining a sample volume gate on a two-dimensional (2D) ultrasound image, the sample volume gate defining a location at which flow is to be estimated, automatically calculating a SNR for an initial transmit and receive steering position (aperture location) and aperture size, automatically calculating a SNR for a different second transmit and receive steering position (aperture location) and aperture size, automatically comparing the SNR for the first set of apertures to the SNR for the second set of apertures, and automatically adjusting the steering angle and an aperture size of an ultrasound probe's transmit and receive events based on the comparison.

The invention discloses a wireless three-dimensional ultrasound imaging method and device. The device comprises a server terminal mounted on a medical ultrasonic diagnostic instrument and a client mounted in background. The method includes acquiring, in a manner of screen capturing, a plurality of continuous two-dimensional ultrasound images displayed on the medical ultrasonic diagnostic instrument, processing the captured two-dimensional ultrasound images, acquiring patient, diagnosis position, probe type and scanning depth information, and finally extracting an interested area to perform three-dimensional reconstruction. In actual application, corresponding position estimation of adjacent image frames can be performed through image information to perform three-dimensional reconstruction; position information of the two-dimensional ultrasound images can be acquired from a positioning device, and three-dimensional reconstruction can be performed according to the position information and images. According to the method, image data of the commercial medical ultrasound imaging system can be acquired from an interface closed to the outside in the manner of screen capturing, the medical ultrasound imaging system produced by one particular vendor can be avoided, and the method has the advantages of platform crossing and high portability.

A method and apparatus for three-dimensional visualization and analysis for automatic non-destructive examination of a solid Rotor using ultrasonic phased array is disclosed. Data is acquired by scanning a solid rotor with a phased array ultrasound transducer producing a plurality of two dimensional ultrasound scans. Each of a plurality of sample points of a plurality of two dimensional ultrasound scans are associated with a corresponding 3D image point of a regular grid. A kernel function for each of the plurality of sample points defining a size and shape of a kernel located at the corresponding image point is determined. A weight is assigned to each kernel which, in one embodiment, is based on the sample point value. A value for each image point of the regular 3D grid is determined based on kernels overlapping each image point. A three-dimensional volume representing the solid rotor is then visualized.

The invention relates to a method for co-plane judgment for a two-dimensional ultrasound image and a puncture needle. An ultrasonic probe is held by one hand to scan the puncture needle in tissue and preserve the ultrasound image of the puncture needle in the tissue. The method is characterized by comprising the following steps: step 1, extracting an imaging region on the ultrasound image, converting a color image to a gray image, and converting to a binary image after threshold transformation; step 2, carrying out edge detection on the binary image obtained in the step 1, and determining a straight line on which the puncture needle is positioned through Radon transformation; step 3, positioning the position of the needle tip of the puncture needle; step 4, by judging whether a gray value of the intersection point of the straight line, on which the puncture needle is positioned and the ultrasound imaging region boundary is larger than a certain threshold value or not, determining whether the puncture needle is positioned in an imaging plane or not.

The invention provides an image processing system and an image processing method. A breast image processing system includes an image capturing device, a tumor detector, a spine detector and a tumor splitter, wherein the image capturing device is used for capturing a two-dimensional ultrasound breast image; the tumor detector is used for detecting a tumor area with a breast tumor from the two-dimensional ultrasound breast image captured by the image capturing unit; the spine detector is used for detecting the spine information from the captured two-dimensional ultrasound breast image; the tumor splitter is used for splitting the breast tumor from the detected tumor area based on a level set; a level set function is created for the two-dimensional ultrasound breast image in a manner that the detected tumor area serves as an initial contour curve, and the level set evolution of the contour curve is limited iteratively according to the spine information detected by the spine detection unit, so that the energy function of the contour curve can be minimized.

The invention designs an image tracking method based on multi-neighborhood-aided two-dimensional ultrasonic deformed microstructure, which comprises the steps as follows: a two-dimensional ultrasonic cardiogram of a tested heart object is collected under a high frame frequency condition and used for offline analysis firstly; then any visible image is used as a selected initial frame of a region of interest (ROI) so that the ROI includes cardiac muscular tissues, simultaneously the interferences of grey scale signals is eliminated; after the ROI of the initial frame on an initial image I is completely selected, the original ROI is set as a center; moreover, the ROI and eight areas coating the surrounding of the original ROI and having same sizes are used as a new searching source region, the tracking vectors of all subregions with the sizes the same as the size of the original ROI in the searching area are traversed through an SAD (Sum of Absolute Differences) arithmetic; and weighted average is implemented on each tracking vector finally, thus obtaining the tracking result of the original ROI. Compared with the traditional SAD tracking method, the neighborhood tracking result of the ROI is sufficiently considered; therefore, the image tracking method based on multi-neighborhood-aided two-dimensional ultrasonic deformed microstructure has excellent noise immunity, and is especially beneficial for movement estimation and parameter calculation on movement issues.

The invention discloses a three-dimensional ultrasound image scanning device based on rear-end scanning, comprising a probe bracket, a probe clip (7), two stepper motors (4) and a swing mechanism. The probe bracket comprises two side support plates oppositely arranged in parallel; ends of the two side support plates in a same direction are connected through a fixed connecting plate into a whole; the probe clip (7) is arranged in the space between the two side support plates in a swinging manner and is provided with probes (2); the two stepper motors (4) are respectively arranged on the outer sides of the two side support plates for driving the probe clip (7) to swing in a bracket (3); and the swing mechanism is driven by the stepper motors (4) and drives the probe clip (7) to perform a sector scanning movement by adopting an ultrasonic wave emitting surface on the top of the probe (2) as a vertex so as to implement the collection of two-dimensional ultrasound data. The device is simple in structure, low in cost, reasonable in structure and good in imaging effect.

An ultrasound imaging apparatus (10) for inspecting a volume of a subject (12) is disclosed. The ultrasound imaging apparatus comprises an ultrasound probe (14) including a plurality of ultrasound transducer elements for acquiring three-dimensional ultrasound data in a field of view (32), and for providing three-dimensional and two-dimensional ultrasound image data in the field of view. An image processing unit (18) is coupled to the ultrasound probe for receiving the two-dimensional ultrasound image data in an image plane (42, 44) and for determining an anatomical feature (30) in the two-dimensional ultrasound image data. An evaluation unit (20) is provided for evaluating the two-dimensional ultrasound image data and for determining a quality parameter based on a positional relation of the anatomical feature with respect to the image plane, and an alignment unit (28) is provided for aligning or indicating an alignment of the image plane bases on the positional relation and the quality parameter.