30 results about "Quantitative ultrasound" patented technology

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.

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.

A surface topology map technique and apparatus are disclosed for determining calcaneus thickness for imaging quantitative ultrasound measurements; improving measurement accuracy, particularly in in vivo applications.

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 move horizontally 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.

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 relates to a positioning ultrasonic testing device and a positioning ultrasonic testing method for a plane welding component and belongs to the field of ultrasonic testing. The structure of the device is as follows: an ultrasonic probe is connected with an ultrasonic testing module through a probe connecting line; the ultrasonic testing module is connected with an industrial computer through a PCI bus; a serial mechanical arm has a mechanical arm structure formed by the connecting rods in serial connection; the ultrasonic probe can realize the plane structure detection; an angle sensor on the serial mechanical arm is used for converting the angle change of each connecting rod 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 method comprises the following steps: treating a workpiece surface and scanning the workpiece surface. The invention has the advantages that the problems of complex ultrasonic scanning mechanism and large floor space can be solved; the quantitative ultrasonic testing of large-size welding component is realized; 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 image.

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.

Microcalcifications can be detected using quantitative ultrasound tomography. Refraction-corrected reflection images generated from a quantitative ultrasound system can be thresholded, and morphologically analyzed to isolate voxels corresponding to microcalcifications.

An ultrasonic sensing technique and a signal interpretation method based on a spectral element multiphase poromechanical approach overcomes critical gaps in permafrost, frozen soil, and saturated soil characterization. Ultrasonic sensing produces high-quality response signals that are sensitive to the soil properties. A transfer function denoting a ratio of induced displacement and applied force in the frequency domain, is independent of the distribution of the stress force applied by the transducer to the sample, and allows interpretation of the measured electrical signal using a theoretical transfer function relation to efficiently determine the most probable properties from response signals using an inverse spectral element multiphase poromechanical approach. This ultrasonic sensing technique enables rapid characterization of soil samples in terms of both physical and mechanical properties. The Quantitative Ultrasound (QUS) system can be used in a laboratory setup or brought on site for in-situ investigation of permafrost, frozen, and saturated soil samples.

In order to carry out longitudinal monitoring of a patient by using quantitative ultrasound (QUS), one or more indicators of region of interest (ROI) position relative to the patient and one or more images from a past QUS imaging for the patient are stored. The indicator is add to an image with the ROI. For the subsequent QUS imaging of the patient, the indicator is used to position the ROI. In QUS monitoring, a same or fixed anatomy is monitored from examination-to-examination based on the placement of the ROI and by using a displayed indicator for the previous placement.

The invention discloses an ultrasonic bone strength evaluating and diagnosing instrument. The ultrasonic bone strength evaluating and diagnosing instrument comprises a transmitting module, a receivingmodule, a detecting region, a processing module, a calculation module and an output module, wherein transmitted signals transmitted by the transmitting module penetrate through the detecting region and are received by the receiving module; the processing module calculates phase velocity c according to sound velocity of the transmitted signals and the received signals; the calculation module calculates bone strength evaluating T indexes through the phase velocity c; and the output module outputs T index results. A quantitative ultrasonic measuring result is in direct contact with the inherentessence and the final result of osteoporosis, troublesomeness which is difficult to measure of BUA is reduced, the manufacturing cost and the using difficulty can be reduced remarkably, promotion andapplication are facilitated, and osteoporosis can be evaluated and diagnosed rapidly and scientifically.