30 results about "Quantitative ultrasound" patented technology

A thin film piezoelectric material employs a metallic backer plate to provide high output, non-resonant ultrasonic transmissions suitable for quantitative ultrasonic measurement and / or imaging.

Methods and systems for displaying ultrasound data are provided. One method (50) includes acquiring (5) ultrasound image data and physiological monitoring data during an ultrasound imaging scan, generating (56) quantitative ultrasound data from the acquired ultrasound image data and correlating (60) the quantitative ultrasound data with the physiological monitoring data. The method also includes displaying (62) the correlated quantitative ultrasound data and physiological monitoring data time aligned on a display.

The invention relates to region of interest placement for quantitative ultrasound imaging. For region of interest (ROI) placement in quantitative ultrasound imaging with an ultrasound scanner (30), the ROI is automatically placed (14) using anatomy detection (10) specific to the quantification, signal processing (11) for clutter, attenuation, or noise, and / or identification (12) of regions of fluid. For quantification, multiple ROIs may be positioned automatically (14). The automatic placement (14) may improve consistency of measures over time and between sonographers and may provide for better image quality with less influence from undesired signals. As a result, diagnosis and / or treatment may be improved.

A method is described for acquiring 3D quantitative ultrasound elastography volumes. A 2D ultrasound transducer scans a volume of tissue through which shear waves are created using an external vibration source, the synchronized measurement of tissue motion within the plane of the ultrasound transducer with the measurement of the transducer location in space, the reconstruction of tissue displacements and / or tissue velocities in time and space over a volume from this synchronized measurement, and the computation of one or several mechanical properties of tissue from this volumetric measurement of displacements. The tissue motion in the plane of the transducer may be measured at a high effective frame rate in the axial direction of the transducer, or in the axial and lateral directions of the transducer. The tissue displacements and / or tissue velocities over the measured volume may be interpolated over a regular grid in order to facilitate computation of mechanical properties.

Systems and methods for classifying tissue using quantitative ultrasound techniques. Parameters are calculated directly from raw echo signal data acquired from a region of interest during an ultrasound scan and used to generate a parameter map. These parameters were calculated after normalizing the echo signal data with reference data to reduce the influence of variations in instrument settings, ultrasound beam diffraction and attenuation effects. First and second order statistical measures are computed from these parametric maps and used to classify the tissue or tissues in the region of interest. Using these systems and methods, organizations can be classified using different classification levels. For example, tissue characterized as malignant cancer can be additionally graded (eg, grade I, II or III).

An electronic phantom and method for electronically controlling a phantom for a quantitative ultrasound device are provided. The electronic phantom includes a housing, a first transducer element within the housing configured to receive an ultrasonic signal from a quantitative ultrasound device and a second transducer element within the housing connected to the first transducer element. The second transducer element is configured to transmit a modified ultrasonic sound wave to the quantitative ultrasound device based on the received ultrasonic signal. The first and second transducer elements are positioned in a back to back configuration within the housing.

The invention discloses a constant-temperature numerical-control ultrasonic cleaning method and device. The constant-temperature numerical-control ultrasonic cleaning method includes the steps that the temperature of ultrasonic liquid inside the constant-temperature numerical-control ultrasonic cleaning device is detected, when the temperature of the ultrasonic liquid is higher than a set value, a certain amount of low-temperature ultrasonic liquid is added into the constant-temperature numerical-control ultrasonic cleaning device and evenly stirred, meanwhile, a certain amount of ultrasonic liquid is discharged out of the constant-temperature numerical-control ultrasonic cleaning device, and when the temperature of the ultrasonic liquid is lower than the set value, the ultrasonic liquid is heated to the set value. By means of the operation, constant-temperature and constant-amount dynamic balance of the ultrasonic liquid in the constant-temperature numerical-control ultrasonic cleaning device is maintained so as to achieve the aim of constant-temperature ultrasonic cleaning. The constant-temperature numerical-control ultrasonic cleaning device comprises a liquid storage tank. A technological material frame (1) is arranged on the upper portion of the liquid storage tank, a liquid inlet pipe is arranged on the lateral side of the liquid storage tank, a liquid outlet pipe is arranged on the bottom face of the liquid storage tank, a temperature sensor (2) and a heater (3) are arranged inside the liquid storage tank, and a magnetic stirring apparatus (7) and an ultrasonic transducer (8) are arranged below the liquid storage tank. According to the constant-temperature numerical-control ultrasonic cleaning method and device, a refrigerating system in a traditional constant-temperature ultrasonic cleaning device is eliminated, the production cost is greatly reduced, and the size of the constant-temperature ultrasonic cleaning device is reduced.

The invention discloses a tissue microstructure detection method based on empirical mode decomposition in a quantitative ultrasound system. The detection method comprises the steps that firstly, biological tissue ultrasound back-scattered signals are obtained; secondly, the back-scattered signals in a DOI are intercepted to serve as input data; thirdly, EMD is conducted on the input data so as to obtain a three-order intrinsic mode function and a residual term; fourthly, the energy spectrum of the three-order intrinsic mode function is extracted, similarity analysis is conducted on the energy spectrum of the three-order intrinsic mode function and the energy spectrum of the original signals, and a BIMF containing tissue microstructure information is determined; fifthly, the determined BIMF is estimated, and tissue scatterer spacing information is worked out. The method has the advantages that the BIMF is extracted, and useless information in non-coherent mode function items is removed; signals and noise interference of dispersion scatterers are eliminated, an interference peak value in a cepstrum is restrained, and the estimation accuracy of MSS is improved and can reach 90%-95%.

The invention relates to a positioning ultrasonic testing device and a positioning ultrasonic testing method for a curved welding component and belongs to the field of ultrasonic testing. An ultrasonic probe of a testing device is connected with an ultrasonic testing module; the ultrasonic testing module is connected with an industrial computer through a PCI bus; a multi-connecting rod mechanical arm is connected with the ultrasonic probe; the ultrasonic probe can realize the test for different spatial positions and postures; five angle sensors on the multi-connecting rod mechanical arm are used for converting the angle change of each connecting rod in the multi-connecting rod mechanical arm into an electric signal and feeding back to a data collecting card; the electric signal is inputted to the industrial computer through a USB connecting line. The testing method comprises the following steps: treating a workpiece surface, arranging the position of a multi-connecting rod mechanical arm base and scanning the workpiece surface. The problem of difficulty in realizing the quantitative ultrasonic testing of the complex surface of the ultrasonic probe driven by a mechanical mechanism is solved. The high-precision online quantitative scanning is performed on an internal defect of the workpiece and the computer is used for fitting and forming numerical value and feeding back the image.

The invention discloses a high-real-time quantitative ultrasonic detection method based on multi-angle stereo matching. Aiming at a serious restriction bottleneck between the fine quantitative representation capacity and detection instantaneity of defects of existing ultrasonic detection devices, a basic idea of a finite element is firstly introduced to rasterize a to-be-detected test piece, a plurality of ultrasonic transducers distributed in different directions of a space are utilized for sequentially irradiating grid cells, and a shifting relation between the fine quantitative representation capacity of the flexible coordinating defects and the detection instantaneity is realized by utilizing the wavelet-transform-based multi-resolution stereo matching correlation based on the acquisition of multichannel ultrasonic reflection echo signals. By collecting the multi-angle ultrasonic reflection echo signals, the high-real-time quantitative ultrasonic detection method has the advantage of complete carried information amount and is more beneficial to realization of the quantitative detection; by utilizing a basic theory of wavelet transform, the method has multi-resolution and time-frequency domain conjoint analysis capacities and is particularly suitable for time frequency signals such as ultrasonic waves and the like.

The invention discloses a measurement device and a detection method for detecting bone density by using an axial quantitative ultrasonic method in the technical field of medicinal instruments. A shell is fixedly connected with one end of a spring set, the other end of the spring set is connected with a side pad, an arm measurement groove is formed in the upper space of the side pad, and the opposite side of the side pad is provided with two same transmitting probes and a receiving probe; the two transmitting probes and the receiving probe are positioned on the same plane on one side of a partition board, and the bottom end of the receiving probe is connected with a transmission component; and a measured arm is put into the arm measurement groove, the spring set drives the side pad to movehorizontally in the arm measurement groove, a rotating shaft of a step motor drives a screw to rotate so as to drive the receiving probe to move, the two transmitting probes transmit ultrasonic slow wave in turn, and the receiving probe converts the ultrasonic slow wave received twice into electrical signals for subsequent processing. The device and the method avoid the measurement error caused by the thickness of soft tissues on the bone, accurately position the position of the receiving probe, and improve the measurement precision.