125 results about "Ct scanners" patented technology

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 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.

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 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 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.

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.

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 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.

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

In an X-ray CT scanner capable of imaging subjects in both supine and standing positions, the calculated output dose should be adjusted to a value appropriate to the condition of the stand. [Solution] The information processing device according to this embodiment comprises a specification unit, a determination unit, and a calculation unit. The specification unit identifies a stand state information that represents the state of the stand, which includes at least one of posture information that represents the posture of the stand having an opening and object information that represents objects other than the subject present in the opening. The determination unit determines dose parameters to be used to calculate the output dose based on the identified stand state information and parameter information that stores dose parameters for calculating the output dose output by the device in association with the stand state information. The calculation unit calculates the output dose using the determined dose parameters.

The invention relates to the technical field of battery cell detection, and discloses a desktop type CT detection device which comprises a shell, an X-ray tube assembly, a flat plate assembly, a carrier and a four-axis adjusting assembly, a detection cavity is formed in the shell, the X-ray tube assembly and the flat plate assembly are both located in the detection cavity, the carrier is located between the X-ray tube assembly and the flat plate assembly, and the four-axis adjusting assembly is located between the X-ray tube assembly and the flat plate assembly. The four-axis adjusting assembly is arranged in the detection cavity, is detachably connected with the carrier and is used for adjusting the position of the carrier, so that the detection sample corresponds to the X-ray tube assembly and the flat plate assembly; the four-axis adjusting assembly is arranged in the detection cavity and detachably connected with the carrier, when the carrier has position deviation or positioning errors, the three-dimensional space position of the carrier can be accurately adjusted so as to correspond to the X-ray tube assembly and the flat plate assembly, the automatic adjusting effect is achieved, steps can be effectively saved, and the detection efficiency can be effectively improved.

This specification provides a multi-contrast agent combined scanning control system and method, relating to the field of medical device technology. The method includes: after delivering a current contrast agent from a syringe based on a current delivery command, monitoring the contrast agent concentration at a preset monitoring layer to obtain the current CT value; if the current CT value meets a preset trigger condition, generating a next delivery command and sending the next delivery command to the syringe; using the next delivery command as a new current delivery command, and using the next contrast agent to be delivered as a new current contrast agent, repeating the above steps; if the CT value of the target site corresponding to the last delivered contrast agent meets the trigger condition, generating a scanning command to initiate a diagnostic scan, thereby controlling the CT scanner to perform a diagnostic scan and acquire scanning data from multiple target sites. In this way, the amount of diagnostic image information can be increased while reducing the amount of contrast agent used and minimizing radiation.

Methods for reconstructing image data (f), where first projection data (p) were acquired during a relative rotational movement between an X-ray source (C2) of a CT device (C1) and at least one examination object (O) lying partially outside the scanning area (FOV) of the CT device (C1), where contour data (k) of the surface of the object under investigation (O) were recorded using a camera (C13), where the spatial correlation between the first projection data (p) and the contour data (k) is known, wherein the first projection data (p) are supplemented with the contour data (k) to create modified projection data (p'), wherein the reconstruction of image data (f) is carried out using the modified projection data (p'), where the subject of investigation (O) is a patient, wherein at least one anatomical landmark is identified in the contour data (k), where the pixel values ​​in the area of ​​the landmark are modified depending on a typical X-ray absorption of this landmark.

To address such a problem that in radiofrequency ablation surgery, although it is possible to identify a cancerous area using a CT device before surgery, when the cancerous area is small, it is difficult for a surgeon to determine a puncture position of a radiofrequency ablation probe, and to provide a patch for determining a position of foreign objects inside a patient's body, a lesion area and an affected area on a body surface.SOLUTION: When using a CT device, a patch with a plate-shaped radiopaque material is used during internal diagnostic X-ray imaging to mark a position on a body surface, the radiopaque material having a plurality of cutouts C1, C3 and C5 within a radiopaque material x range. A surgical procedure of a surgeon is facilitated by specifying a surgical position in an X-ray irradiation direction from an X-ray image, on the body surface of a patient. The captured CT image shows the affected area and the radiopaque material simultaneously, so that a puncture position of a tip of the radiofrequency ablation probe can be easily determined by a positional relation between the affected part and the X-ray patch, thus facilitating the procedure and improving the treatment efficacy. The patch can be used in diagnosis using both general-purpose X-ray equipment and CT equipment.SELECTED DRAWING: Figure 1

To raise awareness of the risk of interference between the camera bed and the mount when changing shooting modes. [Solution] The X-ray CT apparatus according to the embodiment comprises a stand, a patient table, a moving mechanism, and a control unit. The stand has a scanner and a stand. The moving mechanism moves at least one of the stand and the patient table along the direction of movement. The control unit performs one of the following: a first control that tilts the scanner and controls the moving mechanism so that the stand and the patient table move apart, based on a first signal that transitions from a first positional relationship of the stand and the patient table when performing a first imaging using the patient table to a second positional relationship of the stand and the patient table when performing a second imaging without the patient table; and a second control that tilts the scanner and controls the moving mechanism so that the stand and the patient table move closer together, based on receiving a second signal that transitions from the second positional relationship to the first positional relationship.

This invention discloses a radial permanent magnet levitation bearing system for a high-speed direct-drive CT scanner, belonging to the field of magnetic levitation bearing technology. The bearing system comprises an inner ring system and an outer ring system similar to rolling bearings, consisting of a stator permanent magnet double semi-ring, a rotor permanent magnet ring, left and right auxiliary mechanical control and protection bearings, and multiple integrated bases. The stator permanent magnet double semi-ring is specially cut and rotated, and is concentrically fitted with the rotor permanent magnet ring with a clearance fit. The auxiliary bearings form a preloaded protection system. Stable levitation by permanent magnet force is achieved through mechanical control, eliminating the need for an electronic control system. The CT scanner motor rotor and stator are fixedly connected to the inner and outer ring systems of the radial permanent magnet levitation bearing, respectively, serving as magnetic levitation support for the CT scanner motor rotor. This bearing system ensures high-speed and stable operation of the CT scanner, increases its operating speed and service life, reduces operating noise, shortens CT examination time, and is suitable for medical and health environments, laying a theoretical foundation for the development of magnetic levitation CT scanners.

A method of manufacturing customized ceramic labial / lingual orthodontic brackets by digital light processing, said method comprises measuring dentition data of a profile of teeth of a patient, wherein measuring dentition data is performed using a CT scanner or intra-oral scanner, based on the dentition data, creating a three dimensional computer-assisted design (3D CAD) model of the patient's teeth using reverse engineering, and saving the 3D CAD model on a computer, designing a 3D CAD bracket structure model for a single labial or lingual bracket structure, importing the 3D CAD bracket structure model into a Digital Light Processing (DLP) machine, directly producing the bracket by layer manufacturing.

To provide a resource allocation system and method for managing the use of local and remote resources for medical image processing tasks.SOLUTION: A simplified medical imaging ecosystem 100 including various networked medical facilities includes a first medical facility 102 and a second medical facility 103 that are operated as part of a medical system 106. The medical facility 102 includes a CT scanner 110, which includes a LCI112 used to process acquired projections to reconstruct CT images, and an MR scanner 120, which includes a LCI122 and processes acquired projections to reconstruct MR images. Medical facility 103 includes a computed tomography (CT) scanner 130 that includes a LCI132 used to process acquired projections to reconstruct CT images and a positron emission tomography (PET) scanner 140 that includes a LCI142 used to process acquired projections to reconstruct PET images.SELECTED DRAWING: Figure 1

The invention discloses a tungsten-rhenium alloy preparation method for controlling the size of a second phase, and belongs to the technical field of medical CT machine anode target material preparation. W-10wt% Re-x Al2O3 precursor powder is synthesized by adopting a wet chemical method, wherein the content of Al2O3 is realized by regulating and controlling the addition amount of aluminum nitrate pentahydrate in the precursor. And the precursor powder is subjected to reduction treatment through a tubular furnace, and alloy powder is obtained. And then, powder densification is achieved through SPS sintering, and then the overall performance of the block is improved through rolling. According to the method, the influence of the content of the second phase (Al2O3) on the alloy performance and the influence of different processes on the size of the second phase are explored, and the purpose is to determine the optimal content interval so as to meet the strict working condition requirement of the medical CT machine target material. According to the method, an effective way for preparing the high-performance W-10wt% Re alloy by combining SPS and second phase introduction is determined through experiments, and the way has the advantages of process simplification and microscopic structure regulation and control.

To efficiently recover abrasion powder.SOLUTION: A wear debris collection device according to the present embodiment includes a dust collection device and an airflow passage. The dust collector has a dust collecting box provided in the vicinity of a brush base plate which is provided in a frame fixing part of the CT apparatus and supports a brush column, and a dust collecting fan communicating with the inside of the dust collecting box. The airflow passage is disposed on the brush base plate such that one end of the airflow passage is connected to the dust collector and the other end of the airflow passage is located near at least one of the brush post and the pin. When the dust collection fan operates, an airflow flowing from the vicinity of at least one of the brush post and the pin into the dust collection box is formed in the airflow passage. According to the present embodiment, by the operation of the dust collection fan, an air flow for moving the abrasion powder from the surface of the brush board into the dust collection box is formed in the vicinity of at least one of the brush column and the pin, and the abrasion powder accumulated in the vicinity of at least one of the brush column and the pin is reduced, so that the risk of short circuit between the W-phase, the V-phase, and the U-phase can be reduced.SELECTED DRAWING: Figure 7