177 results about "Ct scanners" patented technology

The invention relates to the technical field of deep underground engineering, in particular to a deep underground engineering surrounding rock loose circle evolution process visualization method and related equipment. According to the technical scheme, the method comprises the steps that rock samples collected on site are scanned at different loading stages through a CT scanner, CT scanning images are obtained, meanwhile, monitoring sections and monitoring points are arranged on the deep underground engineering site, displacement, stress and strain sensors are installed, and surrounding rock information is obtained through the drilling camera shooting technology; finite element software is used for establishing a numerical model of deep underground engineering, a viscoelastic-plastic constitutive model considering rock damage and rheological characteristics is selected, model parameters are assigned according to CT scanning images and rock mechanical test results, and corrected numerical simulation data are obtained through parameter inversion correction. According to the method, reliable surrounding rock information is obtained by comprehensively applying multiple data acquisition means, and the accuracy of a numerical simulation result is improved by adopting the viscoelastic-plastic constitutive model considering rock damage and rheological characteristics.

The invention belongs to but is not limited to the technical field of petroleum engineering, and particularly relates to a shale reservoir polymer fracturing fluid retention characteristic analysis method and system, and the method comprises the following steps: S1, carrying out a displacement experiment by using polymer solutions with different molecular weights and concentrations; s2, the retention condition of polymers in the rock core before and after displacement is observed through a micron CT and scanning electron microscope technology; and S3, analyzing the influence of the polymer solutions with different molecular weights and concentrations on the retention characteristics in the shale reservoir. The invention aims to carry out a displacement experiment on the rock core by using polymer solutions with different molecular weights and concentrations, and then observe and compare the polymer solutions of the rock core before and after displacement by using equipment such as a CT scanner and an electron microscope, so as to obtain the retention and migration conditions of the polymer in the hole seam of the rock core. The retention characteristics of fracturing fluid polymer molecules in a microporous structure and a matrix are studied, so that a correct polymer molecular weight range is provided for reservoir transformation, fracturing fluid reservoir damage is reduced, and the fracturing yield increasing effect is finally improved.

The invention discloses a real-time monitoring method and system for the breakage rate and flow conductivity of a propping agent based on CT scanning. The real-time monitoring method comprises the steps that a CT scanner is externally connected to a quartz glass observation window of a flow guide chamber through a mechanical arm; performing initial scanning on the propping agent in the flow guide chamber through a CT scanner to obtain initial particle volume distribution and determine an initial volume and a minimum volume threshold value; setting the temperature and overburden pressure of the flow guide chamber, and injecting fluid through a constant-speed constant-pressure pump; cT dynamic scanning is triggered at a fixed time interval, and the real-time breakage rate is calculated; when the real-time breakage rate is larger than 5%, the pressure difference, the flow and the crack width are obtained; calculating the flow conductivity by combining the fluid viscosity and the length of the flow guide chamber; when the real-time breakage rate is smaller than or equal to 5%, returning to scan again; and when the pressure difference is greater than 5MPa, the experiment is automatically stopped. According to the invention, the three-dimensional image data in the experiment process can be rapidly obtained and processed and analyzed in real time, so that the measurement time is remarkably shortened, and the measurement efficiency is improved.

The invention discloses a copper wire tinning method for tinned copper stranded wire production, which relates to the technical field of metal surface treatment, and comprises the following steps: releasing a copper wire to an ionic liquid electrophoresis tank, applying an electric field to strip surface oxides, and then carrying out three-stage countercurrent rinsing to generate a clean copper wire; putting the clean copper wire into a composite plating tank, monitoring the tin liquid viscosity and the copper wire linear speed in real time, calculating the magnetic field gradient, and controlling tin crystal oriented growth according to the magnetic field gradient to generate an oriented crystallization tinned copper wire; the surface temperature of the directionally crystallized tinned copper wire is monitored in real time and compared with a preset temperature threshold value, a temperature permission trigger signal is generated, the annular array spray gun is triggered to work according to the temperature permission trigger signal, and a densified tinned copper wire is generated; and the densified tinned copper wire is scanned through a micro-focus CT scanner, a gap three-dimensional point cloud picture is generated, the gap size and the normal angle of the gap three-dimensional point cloud picture are analyzed, the optimal spraying parameters are recognized, and the passivation film tinned copper wire is generated.

A high-temperature and high-pressure core displacement test system includes a CT scanner configured to perform CT scanning, a gripper system configured to grip a core, a machine tool configured to move the gripper system to the CT scanner for CT scanning, a gripper load control system configured to heat and input a fluid into or / and receive a fluid output from the gripper system, and an acquisition and data analysis system configured to acquire a temperature and a pressure within a core gripping cavity, and detection data of the CT scanner and strain rosettes for analysis. According to the high-temperature and high-pressure core displacement test system and method, the strength of the gripper system in a high-temperature and high-pressure environment is improved, the projection performance of CT rays is ensured, and the optical fiber positioning precision and the core deformation measurement precision in a CT rapid scanning state are improved.

A method of motion correction image reconstruction for photon-counting CT images includes scanning a subject via a photon-counting CT scanner device to obtain measured projection data; performing, via motion correction circuitry of the motion correction system, a LLE motion correction algorithm on the measured projection data to obtain motion correction data; generating, via reconstruction circuitry of the motion correction system, reconstructed image data from the motion correction data; and outputting corrected image data based, at least in part, on the reconstructed image data. A binary bad pixel mask is applied to exclude contributions from the bad pixels to the measured projection data. An unreliable volume mask is applied to exclude contributions from X-ray beams that passed through unreliable portions of the reconstructed image data. A virtual static object removal algorithm is performed to remove a static object from the measured projection data.

A controller and method are for configuring operation of a kVp-s witching spectral CT imaging apparatus which, in at least one mode, aims to mimic the user-side operating workflow of a conventional non-spectral CT scanner. The controller receives user-defined settings associated with operation of a non-spectral CT system, comprising a desired peak tube voltage and desired tube current. Based on these user-specified inputs, the controller performs a conversion procedure to derive a set of spectral CT operating parameters which are estimated to result in administration of the same dose of X-ray radiation over a single kVp switching cycle as would be administered by the conventional scanner over a same time duration. Thus, the user can acquire CT projection and image data using a spectral CT scanner, without a need to change their own operating workflow, and furthermore in a way that will administer the same radiographic density as they would expect to achieve with the same user-specified settings on a conventional scanner.

A CT scanner for performing a brain scan performs a low-dose 3D scan in a first field of view. By analyzing the low-dose 3D scan, for example using landmark detection, a proposed field of view for a full-dose 3D brain scan is obtained. A representation of the proposed field of view is displayed and a final field of view is generated as the proposed field of view or an updated version of the proposed field of view provided by a user of the CT scanner.

This invention discloses a two-dimensional physical simulation experimental device and method for CO2 utilization and storage in gas reservoirs. This experimental method enhances natural gas recovery by injecting CO2 and conducts storage simulation experiments. In this experiment, CO2 with an extracted indicator is injected into a sand-filled model saturated with natural gas to conduct a gas drive experiment. Then, an X-CT scanner is used to scan the long core model at different times. The attenuated X-rays are projected onto developing paper, and high-definition cameras are used to capture images of the developing paper at different times. The light intensity at each point in the developing paper images at different times is statistically processed to obtain the CO2 concentration at different points at different times. This allows for real-time monitoring of the CO2 distribution in the core model at different times, and the study of CO2 driving mechanism, migration, and storage laws.

The invention relates to a metal artifact removal method based on multi-energy-level broad-spectrum X-ray data. The method comprises the following steps: acquiring double-energy-level CT image data and multi-energy-level CT image data of a plurality of patients containing metal artifacts, and standard image data after removing the metal artifacts, and constructing a training sample set; based on the CT image data of different energy levels corresponding to the same patient in the training sample set, performing metal region segmentation to obtain a metal region mask image; utilizing the training sample set and the metal area mask image training model to obtain a convergent metal artifact removal model; and inputting the to-be-processed CT image data of any energy level into the metal artifact removal model to obtain the CT image data after metal artifacts are removed. The metal artifact removing method solves the problems that in the prior art, a metal artifact removing method depends on a high-end CT scanner, or analog data are adopted, the data energy level is single, and consequently the existing method is poor in generalization ability and poor in low-energy-level CT scanning image processing effect.

The utility model discloses a CT (computed tomography) device capable of adjusting irradiation measurement according to local weight distribution. The CT device comprises a scanning bed and a scanning device. The scanning bed comprises a bed frame and a bed board, and the bed board is slidably connected to the bed frame and can go deep into and out of the scanning cavity of the scanning device in the Z direction. The bed frame is designed to be of a supporting, lifting and telescopic structure for the bed board. The bed plate comprises a supporting plate and a sensor layer, and the supporting plate is designed to be of a supporting structure of the bed plate and is slidably connected with the bed frame. The sensor layer comprises a base layer, a plurality of pressure sensors and a sensor interface, the base layer is designed as a supporting and insulating structure of the pressure sensors, the plurality of pressure sensors are distributed on the base layer in an array shape, each pressure sensor is connected to the sensor interface through a flat cable, and the flat cable is arranged along the base layer. According to the CT equipment provided by the utility model, the pressure distribution data of the scanned object on the scanning bed is obtained through the pressure sensor arranged on the scanning bed, and the irradiation dose of each scanned fault is optimized according to the weight distribution characteristics.

The present invention relates to the field of clinical radiotherapy technology, and in particular to a test system and method for the effect of an iodized oil area on photon radiotherapy dose. The system comprises: a plurality of iodized oil samples, each of which is made by mixing minced pig liver and iodized oil in different proportions; a cylindrical sample tube, each of which is composed of a plurality of detachably connected sample chambers, each of which is provided with the iodized oil samples in the sample chambers, each corresponding to the iodized oil sample. The linear accelerator irradiates an abdominal simulation phantom into which the sample tube is inserted. The CT scanner is connected to a radiotherapy planning system, which simulates the irradiation of the sample tube with a photon beam based on a CT image and obtains a simulated dose of electron density. The present application can characterize the effect of the iodized oil area on the photon radiotherapy dose by comparing the simulated dose of electron density obtained by the radiotherapy planning system with the actual dose of electron density obtained by an ionization chamber detector.

The computed tomography (CT) scanner gantry rotates relative to the fixed substrate of the CT scanner. During gantry rotation, digital data is transmitted from a data source via a modulator, transmission channel, and demodulator to a data receiver between the gantry and the substrate. A predistortion device located upstream of the transmission channel predistorts the transmitted signal generated by the modulator from the data source through modulation according to a predistortion rule. Only the predistorted transmitted signal is transmitted to the transmission channel. Alternatively or additionally, a postdistortion device located downstream of the transmission channel postdistorts the signal transmitted via the transmission channel according to a postdistortion rule, and only the postdistorted signal is transmitted to the demodulator. The predistortion rule and / or postdistortion rule are repeatedly reset by a setting device during gantry rotation.

The application provides a production method of a CT scanner plug, comprising the following steps: step 1: installing a sealing ring into a groove of a positioning disc; assembling a positioning shaft and a pin together; combining the positioning shaft and the positioning disc together; placing a shell into an annular groove of the positioning disc and fastening by means of an inner hexagonal screw; inserting a tail sleeve accessory into the shell, and welding a wire core of the tail sleeve accessory with the pin; inserting a front end of a shielding sleeve into a gap between the positioning shaft and the positioning disc, and completing assembly of the plug accessory and a mold; step 2: pouring epoxy resin into the shell, then placing the plug accessory together with the mold into a vacuum barrel, and performing vacuumizing; step 3: placing the plug accessory and the mold into an oven for curing, removing the mold after the epoxy resin is cured, and obtaining a CT scanner plug product. The application can accurately position each accessory of the CT scanner plug, ensure smooth pouring of the epoxy resin, and ensure that there is no air bubble in the poured epoxy resin, thereby ensuring product quality.

The invention relates to the technical field of power battery testing, and discloses a corner drop testing system and method under a power lithium battery monomer transportation environment. The system comprises a falling control module, a falling table capable of adjusting the falling height and angle of a battery, a positioning clamp and a parameter control unit, and the parameter control unit sets the falling height according to different transportation types such as highways, railways, waterways and aviation and classic falling scenes; the environment simulation module is used for simulating a transportation high-low temperature environment by using a temperature control box, and a falling table and a positioning clamp are arranged in the environment simulation module; the damage analysis module is used for scanning the fallen battery by using an industrial CT code scanner to generate a three-dimensional reconstructed image, quantifying internal damage characteristics and judging the safety of the battery under the transportation type corresponding to the test height; the technical problem that in an existing power battery drop test, deviation exists between test design and an actual transportation environment, and blind areas exist in evaluation indexes, so that the effectiveness of a test result is low is solved.

The present invention relates to an image processing apparatus, method, and program that reduce the difference in image quality between high-absorbent regions and adjacent regions in a tomographic image. [Solution] The system includes a processor, which identifies high-absorbent regions in a projection image obtained by imaging a subject containing high-absorbent materials using a CT scanner, and derives a corrected projection image by performing a correction on the high-absorbent regions in the projection image to suppress the image quality difference between the high-absorbent regions and other regions other than the high-absorbent regions.

The invention discloses a detector which is not provided with an external collimator and can be used for SPECT (single photon emission computed tomography) and PET (positron emission tomography). The detector comprises a crystal unit and a photoelectric detection layer, a plurality of gaps are formed in the top of the crystal unit, the non-gap structure part in the crystal unit is used for blocking gamma photons emitted by SPECT nuclides, and the gaps are used for collimating the incident gamma photons emitted by the SPECT nuclides and then enabling the gamma photons to enter the bottom of the crystal unit; the photoelectric detection layer is used for detecting scintillation light excited by the gamma photons in the crystal unit and converting the scintillation light into electric signals. The imaging system comprises a plurality of detectors which are arranged according to a set rule. According to the invention, the problems of high cost, heavy system and lack of multi-nuclide simultaneous imaging capability of traditional nuclear medicine imaging are solved, and a solution is expected to be provided for a next-generation high-performance PET / SPECT / CT scanner.

This invention relates to a bone mineral density measurement system and method. The system includes a CT scanner with a quantitative computed tomography (QCT) module, an independent single-calibration phantom, and a QCT data image processing program. The devices can exchange data via network or mobile storage. The data receiving module of the QCT data image processing program receives medical digital images from the CT scanner and measures the patient's bone mineral density through the bone mineral density analysis module. This invention combines a CT scanner, QCT, and a single-calibration phantom, employing an asynchronous scanning method that separates the phantom and the patient. This results in higher measurement accuracy, greater convenience, and improved patient comfort.

Technologies for computed tomography (CT) image reconstruction of moving objects include a computing device coupled to a CT scanner. The computing device captures sinogram data indicative of one or more moving objects and determines a trajectory for each object. The trajectory may be determined as a function of the sinogram data. To do so, the computing device may determine an enveloping curve from a set of intersections of sequential projections and identify a tangent line that touches the enveloping curve at two points. The computing device determines a trajectory sum as a function of the sinogram and the trajectory of each object. Determining the trajectory sum includes calculating a line integral along the trajectory in the sinogram space. The computing device may splice or interpolate combined sinogram data to generate sinogram data for each object. The computing device generates an image of each object based on the trajectory sum.

1. Name of the product in this design: Cone-beam CT scanner (SAXG1010A). 2. Intended use of this design: for dental medical applications. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model provides a structure of a CT scanning device, and relates to the technical field of CT scanning, the structure comprises a CT scanner and a multi-axis mechanical arm connected with the CT scanner, the CT scanner is driven by the multi-axis mechanical arm to move so as to adjust a scanning path according to the body type of a patient, the structure further comprises a supporting mechanism, the supporting mechanism is used for supporting the patient, and the supporting mechanism is used for supporting the patient. And a fan is mounted on the CT scanner. Through the arrangement of the CT scanner and the multi-axis mechanical arm, the CT scanner is driven by the multi-axis mechanical arm to move, so that the CT scanner can adjust the scanning path according to the body type of the patient, the scanning effect on the patient is improved, and the scanning flexibility and adaptability are greatly improved; and the conditions of image distortion or key information omission caused by improper scanning paths are reduced.

The invention discloses a health management and control method based on medical equipment, and relates to the field of medical equipment, and the method comprises the steps: collecting running state parameters of a CT scanner in real time, creating a cloud database, and storing the collected running state parameters of the CT scanner based on the cloud database; position sensors are deployed on moving parts of the CT scanner, in the running process of the CT scanner, the position sensors are controlled to run synchronously, position information is sensed in real time, and the motion trails of the moving parts on the CT scanner are constructed based on the sensed position information; according to the method, the running state parameters of the CT scanner are collected in real time and stored in the cloud database, the position sensor is combined to construct the motion trail of the motion part, the running state health of the CT scanner is comprehensively evaluated from the two dimensions of the running state parameters and the motion trail, and whether equipment is healthy or not can be accurately judged. And the running state parameters are marked with timestamps before being stored, and data are updated after each time of maintenance, so that tracing and management are facilitated.

The application discloses a CT dose self-adaptive optimization system and method thereof, and belongs to the technical field of medical images, which comprises a CT scanner, an image data processing workstation, a high-risk population analysis device, a dose parameter self-adaptive optimization device, a dose parameter automatic adjustment device and an intelligent learning unit, and based on the theory of information geometry, the dose parameter optimization problem is promoted from the Euclidean space to the Riemannian manifold space, the dose parameter manifold and the image quality manifold are constructed, the geodesic line is calculated on the manifold through the Fisher information matrix as the Riemannian metric, and the optimal dose path is found. The system adopts a double-manifold collaborative optimization mechanism, establishes a mapping relationship between the two manifolds, and realizes accurate optimization of parameters in combination with a geometric-guided genetic algorithm, and through pre-scanning, high-risk population analysis, information geometry optimization and automatic parameter adjustment, individualized dose control is realized, the radiation dose is additionally reduced by 30-45% compared with a traditional method, the image quality is maintained or improved, and the safety of CT examination is remarkably improved.

The present invention relates to the technical field of salt crust detection, and discloses a method and system for detecting soil salt crust in coastal areas. The method comprises: obtaining the soil surface albedo of a target detection area to determine whether the target detection area is an area with high coverage of soil salt crust; if it is determined to be an area with high coverage of soil salt crust, collecting several groups of soil salt crust samples; scanning the soil salt crust samples using a CT scanner to obtain porosity vertical distribution data, and then determining the first salt crust thickness of the soil salt crust samples; detecting the soil salt crust samples using a spectrometer to obtain spectral vertical distribution data, and then determining the second salt crust thickness of the soil salt crust samples; and determining the soil salt crust thickness in the target detection area based on the first salt crust thickness and the second salt crust thickness. By combining porosity data and spectral data, the present invention can more accurately assess the thickness of the soil salt crust, thereby improving the accuracy of detection.

Systems for evaluating a plurality of medical devices over an at least one network are provided. The systems may include an event detection controller, a plurality of network access devices, and a plurality of technician mobile computing devices. Each network access device may be operatively coupled to a respective one of the plurality of medical devices. Each network access device may receive log data from the respective medical device and process the log data to provide a collection of device data to the event detection controller over the at least one network. The event detection controller may evaluate the collection of device data to identify a plurality of events and generate one or more work orders based on the plurality of events. An exemplary event may be an air bubble event for a CT scanner.

The utility model discloses a quantitative CT scanner propelling device which comprises a supporting seat, and a supporting table is arranged on the top of the supporting seat. The moving table is located above the supporting table, and pushing components are arranged on the moving table and the supporting table; the propelling part comprises a containing groove formed in the supporting table, two bearings installed at the bottom of the containing groove, lead screws connected with the two bearings, a servo motor installed at a groove opening of the containing groove, and two belt wheels arranged on the two lead screws, and an output shaft of the servo motor is connected with one lead screw; the quantitative CT scanner has the advantages that through the designed propelling component, the moving table can be driven to be close to or away from the quantitative CT scanner body, a patient on the moving table can be rapidly adjusted to the optimal detection position of the scanner, and therefore the detection efficiency of the CT scanner is remarkably improved, the problem that a traditional moving table is inconvenient to move is solved, and the workload of the patient is reduced. And flexible, rapid and accurate movement of the mobile station is realized.

The invention discloses a method for measuring the position degree of a pocket of a plastic retainer based on a CT (Computed Tomography) sensor, relates to the technical field of measurement of the pocket of the plastic retainer, and aims to solve the problems that a traditional measurement means is limited by the characteristics of a non-metal material and is easy to deform after being clamped in a three-coordinate measurement process, so that the measurement is inaccurate, and nondestructive accurate detection is difficult to realize. The method comprises the following steps that 1, a plastic retainer is placed in polystyrene foam to be fixed, and a fixing base material and the plastic retainer are placed in the center of a rotary table of a CT scanner; 2, a filter disc is placed on a collimation partition plate filter disc support at the front end of rays of the CT scanner, and the filter disc is a copper filter disc; and step 3, setting the voltage of the CT scanner to be 150-210 KV, the current to be 290-380 [mu] A, the exposure time to be 420-570 ms and the gain to be 8.0. The method is used for measuring the position degree of the pocket of the plastic retainer.

This invention relates to the field of blood vessel wall thickness identification technology and provides a method for identifying and recording blood vessel wall thickness, comprising the following steps: S1, injecting a contrast agent intravenously into the patient; S2, placing the patient on a CT scanner bed; S3, starting the scanning module; S4, the image processing module receiving the scanning data transmitted by the scanning module; S5, the blood flow monitoring module receiving the scanning data; S6, the interactive representation module receiving the image model transmitted by the image processing module, analyzing and processing the image model, receiving the blood flow data packet from the blood flow monitoring module, analyzing and processing the blood flow data packet, and packaging it into a total data group. The interactive representation module includes an image representation unit that represents the image. This method solves the problem in the prior art that it is impossible to accurately compare and locate the longitudinal and transverse thickness of the blood vessel wall, and achieves the purpose of representing the longitudinal and transverse cross-sectional graphics and cross-sectional data of the blood vessel through the interactive representation module.

To improve image quality.SOLUTION: An X-ray CT device according to the embodiment includes: an X-ray irradiation unit; a photon count detector; an acquisition unit; an estimation unit; and a calculation unit. The X-ray irradiation unit executes a first scan and a second scan. The photon count detector detects a signal related to the first scan and the second scan. The acquisition unit acquires a count of an energy bin detected by the photon count detector. The estimation unit estimates an energy bin response function which depends on the energy based on the count of the first scan, and estimates a pileup correction term per current intensity of the second scan based on the count of the second scan and the energy bin response function. The calculation unit performs a substance discrimination.SELECTED DRAWING: Figure 1

Technologies for computed tomography (CT) image reconstruction of moving objects include a computing device coupled to a CT scanner. The computing device captures sinogram data indicative of one or more moving objects and determines a trajectory for each object. The trajectory may be determined as a function of the sinogram data. To do so, the computing device may determine an enveloping curve from a set of intersections of sequential projections and identify a tangent line that touches the enveloping curve at two points. The computing device determines a trajectory sum as a function of the sinogram and the trajectory of each object. Determining the trajectory sum includes calculating a line integral along the trajectory in the sinogram space. The computing device may splice or interpolate combined sinogram data to generate sinogram data for each object. The computing device generates an image of each object based on the trajectory sum.