59 results about "Radiation hazard" patented technology

The invention discloses a dynamic three-dimensional ultrasonic spine detection method and imaging system, and belongs to the field of medicine.The method adopts a mature three-dimensional spine ultrasonic imaging system to be matched with a wearable wireless ultrasonic probe to collect real-time ultrasonic images, a depth camera records space coordinate changes of spine feature points in real time when the spine of a patient is bent, and the dynamic three-dimensional spine ultrasonic imaging system is obtained. A three-dimensional ultrasonic image, a real-time ultrasonic image and a dynamic three-dimensional image of a back form are fused to obtain a dynamic three-dimensional ultrasonic spine image, and a deep learning algorithm is combined according to the dynamic three-dimensional ultrasonic spine image to carry out Lenke typing parameter measurement and calculation and carry out dynamic comprehensive evaluation on the spine. Scoliosis typing is improved from a traditional X-ray plane evaluation mode based on radiation hazards to non-radiation dynamic three-dimensional ultrasonic analysis, and the problems that in the prior art, the error rate of data collected under the static condition is high, and collection parameters are insufficient are solved.

The invention discloses a target position prediction method and system based on body surface point cloud data, and relates to the technical field of medical signal processing, and the method comprises the steps: obtaining 4DCT reconstruction point cloud data of a plurality of subjects and body surface point cloud data in a respiratory cycle, and building an in-vivo point cloud data set and a body surface point cloud labeling data set; training a body surface and in-vivo point cloud correlation model by using the body surface point cloud labeling data set and the in-vivo point cloud data set, inputting 4DCT reconstruction point cloud data of the patient and the body surface point cloud contour of the current breathing moment into the trained body surface and in-vivo point cloud correlation model, and obtaining a final prediction phase and a final target region transformation matrix; and in combination with the 4DCT reconstructed point cloud data and the body surface point cloud contour at the current breathing moment, obtaining a predicted position of the in-vivo target region on the body surface point cloud contour at the current breathing moment. According to the invention, the position of the target area can be accurately predicted on the body surface contour, the accuracy of radiotherapy irradiation is improved, and radiation hazards are reduced.

The invention relates to the technical field of fusion reactor vacuum leak detection, in particular to an unmanned aerial vehicle leak detection system and method based on array ultrasonic and infrared camera fusion. According to the technical scheme, the system comprises an upper computer and further comprises an unmanned aerial vehicle used for executing a flight task, an infrared camera and an array type ultrasonic detector, and the infrared camera is arranged at the end of the unmanned aerial vehicle and used for obtaining real-time environment information, controlling the flight path and detecting leakage points. According to the invention, non-contact and large-area rapid detection of vacuum chamber negative pressure leakage and fuel gas positive pressure leakage of the fusion device is realized through fusion and complementation of the infrared camera and the array ultrasonic detector in combination with high maneuverability of the unmanned aerial vehicle; the multi-scale ultrasonic array dynamic expansion design improves the detection efficiency and precision, the shielding shell guarantees the equipment stability in a strong radiation environment, the remote wireless control avoids the personnel exposure risk, finally, the safety is ensured, the leakage detection time is remarkably shortened, and the labor cost and the radiation hazard are reduced.

The invention relates to the technical field of accelerator radiation protection, in particular to an induced radioactivity assessment method suitable for a mobile accelerator component. Monte Carlo simulation software is adopted to calculate radionuclide activity concentrations in different areas of an acceleration component before movement, then radionuclides serve as radiation source items, and three-dimensional space dose rate distribution of the component and the periphery when the position of the accelerator component changes is obtained through calculation. And rapid evaluation of the received dose of the staff during maintenance and rapid formulation of a maintenance scheme are realized. The method effectively promotes the application of the Monte Carlo method in the field of radiation protection of the accelerator, provides reference for radiation hazards to workers, and provides technical support for radiation protection and operation maintenance of the accelerator.

The present application relates to a combined inner core for nuclear medicine, comprising inner core assemblies, each of which is provided with at least one aperture of a hot spot hole; the inner core assemblies can be combined at will so that the combined inner core has at least six apertures of hot spot holes. A phantom structure is also provided, comprising a barrel body, the above-mentioned combined inner core and a barrel cover. An automatic bubble-free perfusion method for the phantom structure by means of an automatic perfusion device is also provided. The combined inner core of the present application is flexible to use, and can obtain the required resolution information in a single resolution evaluation. The cumbersome process of replacing the inner core and re-perfusion is avoided. The inner core assemblies of the present application are easy to process, saving production cost and time cost. The perfusion method enables the operator to minimize the risk of possible radiation hazards.

The invention discloses a radiation hazard source identification method with a low counting rate, and relates to the technical field of nuclear technology application. Comprising the following steps: establishing a nuclide library containing radionuclide information; setting a peak position interval corresponding to each radionuclide based on the nuclide library; carrying out statistics on the peak position count of the peak position interval and the high-energy area count of the high-energy area, and caching the peak position count and the high-energy area count obtained through statistics as environment background data; estimating parameters according to the cached environment background data; acquiring a peak position counting rate and a high-energy region counting rate in real time; according to the parameters, the peak position counting rate and the high-energy region counting rate which are obtained in real time, the probability that the peak region is abnormal is calculated; performing early warning sequential test on the abnormal probability of the peak region; and comparing a result of the early warning sequential test with a preset early warning threshold value, and if the result reaches the early warning threshold value, outputting early warning information and identifying a corresponding radiation hazard source. According to the invention, rapid early warning and hazard source identification of abnormal radiation data are realized.

The utility model discloses a foreign matter detection device with a protective structure, which comprises a supporting seat and a conveying belt, the supporting seat is installed and connected on the upper end position of the conveying belt, and the upper end of the conveying belt is provided with a protective cover. When the blocking assembly is installed, firstly, a row of fastening bolts at the upper end of an installation strip are rotated to be rotationally connected to the inlet and outlet of the protective cover, and the blocking assembly is connected and installed in a bolt rotating mode, so that the blocking assembly is more convenient to install and is convenient to disassemble and replace subsequently, and when to-be-detected food enters and exits the protective cover, the blocking assembly is convenient to disassemble and replace. Ray radiation in the protective cover can be blocked through the blocking plates, the ray radiation is prevented from harming workers, the good protective effect is achieved, the anti-radiation coatings are arranged on the end faces of the blocking plates, and the anti-radiation effect can be further enhanced.

The invention provides a fault protection system and method for an MOPA structure fiber laser. Wherein the system comprises: an amplification stage; a main seed source; the detection module is used for monitoring the working state of the amplification stage in real time, determining a fault position in the amplification stage and generating a fault trigger signal when an abnormality is monitored; and the protection module is used for blocking an input light path and an output light path of the fault position through the isolation sub-module within a preset response time after receiving the fault trigger signal, and providing alternative seed light for a downstream amplifier through the seed supply module if the downstream amplifier exists at the fault position, so that the fault position is detected. And at least closing the amplifier corresponding to the fault position through the closing sub-module. According to the invention, the amplifier at the fault position is isolated, signal injection and intelligent closing of the downstream amplifier are maintained, and effective protection of bidirectional amplified spontaneous emission hazards is realized.

The utility model relates to the technical field of heating pads, in particular to a foot bottom heating massage pad. A foot sole heating massage cushion comprises floor leather, a self-temperature-limiting heating assembly, a non-slip mat and a reflecting layer, and the self-temperature-limiting heating assembly is fixedly connected between the floor leather and the non-slip mat; the reflecting layer is fixedly connected to the inner surface, facing the self-temperature-limiting heating assembly, of the non-slip mat. The self-temperature-limiting heating assembly comprises a non-woven fabric heat preservation layer and self-temperature-limiting heating cloth, and the non-woven fabric heat preservation layer is compounded on the upper surface and the lower surface of the non-woven fabric heat preservation layer. A conductive short fiber non-woven fabric layer is arranged in the non-woven fabric heat preservation layer; a self-temperature-limiting heating wire is arranged in the self-temperature-limiting heating cloth; the non-woven fabric thermal insulation layer is fixedly connected with a coupler; and a power supply connecting piece is inserted into the coupler. The heating foot pad overcomes the defects of radiation harmfulness and relatively short service life of a traditional heating foot pad, and the heating mode of releasing infrared rays and far infrared rays is small in skin irritation and has a good foot heating effect.

The application discloses a human variable cross-section bone thickness detection method and system based on ultrasonic guided waves, the system derives a human cortical bone dispersion curve through an anisotropic model, obtains an inverted cortical bone thickness distribution rule by using the dispersion curve, and further obtains a cortical bone two-dimensional thickness distribution image, and the system has no radiation hazard to patients, is low in cost, high in real-time performance, wide in application range, and convenient and fast in obtaining bone thickness measurement results, and takes into account the uneven human bone thickness distribution, and has important value in practice.

The present application relates to the technical field of accelerator radiation protection, and particularly relates to a method for evaluating induced radioactivity suitable for mobile accelerator components; the method is characterized in that the activity concentration of radionuclides in different regions of the accelerator components before movement is calculated by using Monte Carlo simulation software, then the radionuclides are taken as radiation source terms, and the three-dimensional spatial dose rate distribution of the components and the periphery when the position of the accelerator components changes is calculated, so that the rapid evaluation of the dose received by the staff during maintenance and the rapid formulation of the maintenance scheme are realized. The method effectively promotes the application of the Monte Carlo method in the field of accelerator radiation protection, provides a reference for the radiation hazards received by the staff, and provides technical support for the radiation protection and operation and maintenance of the accelerator.

The invention discloses a risk assessment method and device based on radiation hazards and a storage medium. The radiation risk assessment method comprises the following steps: acquiring basic data of a radiation source in a radiation environment; a protection coefficient corresponding to the radiation environment is obtained, and the protection coefficient is used for indicating a grade coefficient of a protection facility in the radiation environment; determining a radiation quantity based on the basic data; on the basis of the radiation quantity and the protection coefficient, the radiation exposure quantity of the sample is determined, and the radiation exposure quantity of the sample is used for indicating the radiation degree of the sample under the influence of the radiation quantity and the protection coefficient; and determining a radiation risk assessment result based on the radiation exposure amount. According to the invention, the technical problem of inaccurate radiation risk assessment result caused by incomplete consideration factors because only the radiation quantity generated by the radiation source is considered in the prior art is solved.

The present invention discloses a pressed detergent with decontamination and radiation shielding functions and a preparation method thereof, wherein the detergent is composed of the following raw materials in mass percentage: composite film-forming emulsion: 40-60%, nano-ceramic dispersion: 5-30%, surfactant: 0.5-15%, complexing agent: 0.5-10%, and auxiliary agent 0.5-5%. The present invention adopts a plurality of emulsions for compounding and modification, shortens the drying film-forming time while ensuring its basic film-forming performance, improves the toughness and structural strength of the coating film to improve the later peeling performance; the nano-ceramic dispersion made of nano-ceramic radiation-proof powder material is added, and the surface effect of the nano-material is used to improve the radiation shielding performance of the material, which can greatly reduce the radiation hazard of harmful rays to operators.

A non-contact cardiogram measurement method is disclosed. The method includes: measuring, by a Doppler radar or a pulse radar, a distance change between the radar and a skin surface through an electromagnetic wave, a light wave and a sound wave; deriving a displacement curve indicating a change in a human heart volume; taking first-order and second-order derivations of the displacement curve to acquire velocity and acceleration curves; taking zero points and extreme points of the velocity and acceleration curves as velocity and acceleration information, and as characteristic points of different stages of atrial and ventricular systole and diastole; acquiring time, volume change, velocity and acceleration information of atrial and ventricular systole and diastole in a cardiac cycle. The present disclosure features low cost and low radiation hazard, avoids direct contact with the human body, and provides a convenient and easy way for daily cardiac diagnostic measurement of special patients.

The application discloses a dynamic three-dimensional ultrasonic spine detection method and an imaging system, and belongs to the medical field. The method adopts a mature three-dimensional spine ultrasonic imaging system, cooperates with a wearable wireless ultrasonic probe to collect real-time ultrasonic images, and uses a depth camera to record the spatial coordinate change of a spine feature point of a patient when the spine is bent. The three-dimensional ultrasonic image, the real-time ultrasonic image and a dynamic three-dimensional image of a back shape are fused to obtain a dynamic three-dimensional ultrasonic spine image. According to the depth learning algorithm, the Lenke classification parameter is calculated, and the spine is dynamically and comprehensively evaluated. The classification of the spine scoliosis is upgraded from the traditional X-ray plane evaluation method based on radiation hazards to the dynamic three-dimensional ultrasonic analysis without radiation. The problems of high error rate of data collected in a static condition and insufficient collection parameters in the prior art are solved.

The utility model discloses a safety device for reducing heat radiation harm in a pellet cooling process in a laboratory, and relates to the technical field of pellet production, the safety device comprises a box body, at least one tray, a smoke exhaust channel and a smoke purification device, the front surface of the box body is provided with an opening, and the two sides of the box body are provided with a plurality of closable ventilation openings; the closable ventilation opening is used for introducing reducing gas or cold air into the box body; refractory bricks are laid at the tops of the trays for placing pellets, the trays are in sliding connection with the box body, and the trays can seal the opening after extending into the box body; the smoke exhaust channel is connected and communicated with the top of the box body; the gas inlet end of the flue gas purification device is connected and communicated with the smoke exhaust channel so that flue gas entering the flue gas purification device from the smoke exhaust channel can be filtered, the flue gas exhausted from the flue gas purification device can meet the emission standard, the structure is simple, use is convenient, heat radiation hazards in the pellet cooling process are effectively reduced, and green pellet production in a laboratory is facilitated.

The present disclosure provides a control method and device of a mobile device, the mobile device and a storage medium. The method comprises: obtaining relative spatial state information of a user and the mobile device, determining antenna configuration information according to the relative spatial state information, and configuring an antenna array in the mobile device according to the antenna configuration information. The method can reduce the radiation hazard of millimeter waves generated by antenna communication to the human body, improve the communication quality and reduce the communication power, and further improve the control effect of the mobile device.

The present invention discloses a radiation-proof curing agent and building materials, wherein the radiation-proof curing agent comprises the following raw materials: 220 to 400 parts of water, 90 to 255 parts of sodium silicate, 10 to 55 parts of sodium hydroxide, 0 to 300 parts of electromagnetic radiation shielding materials, and 0 to 300 parts of neutron shielding materials. The present invention comprehensively utilizes materials such as ilmenite, barite, polyethylene, and boron carbide, and evenly mixes the finely ground radiation shielding materials, activators, and soil materials to form radiation-proof building materials that take into account strength, density, and radiation protection capabilities. The present invention can save construction costs in strong radiation environments such as lunar bases while ensuring that personnel and equipment on the lunar surface are protected from radiation hazards.

The invention discloses an intelligent nondestructive flaw detection device for steel structure, which relates to the technical field of steel structure flaw detection tools, including a tank body; the invention facilitates adjusting the power of X-rays at any time and observing the flaw detection situation at any time through the cooperation of a controller and a connector, thereby improving the flaw detection effect; the thickness and density data of the steel structure are detected by a monitoring module, and the analysis module calculates the ray attenuation coefficient and determines the required X-ray intensity, thereby avoiding the radiation hazard caused by blindly increasing the power; the appearance of the steel structure is detected by a sensor, and the surface defects such as protrusions and depressions are accurately judged, and the influence thereof on X-ray imaging is further analyzed; through a detailed imaging offset analysis step, a coordinate system is established to calculate the change of the ray propagation path and the imaging plane position deviation, and then the ray source translation is calculated to adjust the position, thereby ensuring that complete and accurate imaging can still be obtained when there are protrusions on the surface of the steel structure, thereby improving the adaptability of the flaw detection device to the surface of complex steel structures.

The application provides a kind of chip-level positioning method of orthopedic surgery navigation based on UWB, installs UWB chip-level wireless positioning module on surgical instrument, the biggest advantage of UWB wireless positioning module is that its bandwidth is wider, so it has good anti-interference, only need to communicate with base station and module in the positioning tracking stage to obtain the spatial position of surgical instrument relative to patient, the wireless positioning technology based on UWB is very mature at present, there are diversities in intraoperative visualization means, can be through mobile phone, tablet computer and other equipment to pay attention to the operation state.Compared with the existing optical positioning system, the application has good robustness, high cost performance, strong real-time performance and other advantages.The large bandwidth of UWB ensures low transmission power.In short-range wireless communication applications, the UWB signal power transmitted by the transmitter is less than 1mW, which greatly prolongs the battery life, ensures a longer system working time, and also has less radiation hazard to the human body.

The invention discloses a uranium mine surface radon exhalation rate ex-situ measurement device and a measurement method, the uranium mine surface radon exhalation rate ex-situ measurement device comprises a gas collection hood and a gas extraction piece, a closed-up gas collection channel is arranged above the gas collection hood, the surface of the gas collection channel is provided with two symmetrically arranged connecting pipes, the bottom of the gas extraction piece is provided with insertion holes corresponding to the connecting pipes, and the insertion holes are communicated with the gas collection hood. The air extracting piece is connected with the air collecting channel at the inserting hole through connecting pipes, an air pump is arranged at the end of one connecting pipe, an output pipe extending outwards is arranged on the surface of the air extracting piece, an annular clamping support is arranged in the air collecting channel, a steel wire cage frame is supported above the annular clamping support, and a drying agent is arranged in the steel wire cage frame; the uranium mine surface radon exhalation rate ex-situ measurement device can effectively collect, transfer and precipitate radon gas, is not limited by gas collection positions and environments during measurement, avoids radiation hidden dangers, can efficiently and accurately measure, provides technical support for ecological restoration, and is suitable for popularization and application.

The invention belongs to the technical field of radiochemistry, and particularly relates to an automatic preparation device of a gel type nuclide generator. Comprising a control system, a target cutting system, a stirring reaction system, a filtering and drying system and a washing and column loading system, the control system is connected with the target cutting system, the stirring reaction system, the filtering and drying system and the washing and column loading system so as to send an operation instruction; the target piece cutting system is used for cutting a target tube filled with radioactive substances; the stirring reaction system is communicated with the target cutting system and is used for enabling the radioactive substance and the raw material solution to react to generate a gel solution; the filtering and drying system is communicated with the stirring reaction system and is used for preparing the gel solution into gel particles; and the washing and column loading system is communicated with the filtering and drying system and is used for washing the gel particles, extracting the gel particles and filling the gel particles into the separation column. By using the device, human influence factors in the preparation process are reduced, the repetition rate of generator preparation is improved, the working efficiency is improved, and radiation harm to operators is avoided.

The utility model relates to the technical field of anti-radiation shielding, in particular to an anti-radiation shielding device of medical imaging equipment. The utility model provides an anti-radiation shielding device for medical imaging equipment, which can give an alarm prompt when detecting that the radiation level exceeds a preset value, is convenient for related personnel to take actions quickly, and reduces potential radiation hazards to the greatest extent. An anti-radiation shielding device of medical imaging equipment comprises a mounting frame, an anti-radiation plate and the like, and the mounting frame is connected with the anti-radiation plate. The radiation level in the environment is monitored in real time through the radiation detector, once the detected radiation level exceeds a preset safety threshold value, the alarm lamp is immediately started to send visual and sound alarm signals to on-site personnel, and the purpose of giving an alarm prompt when the detected radiation level exceeds the preset value is achieved. Related personnel can take actions rapidly and conveniently, and potential radiation hazards are reduced to the maximum extent.

This utility model discloses an automatic drug delivery device, relating to the field of reagent injection technology. The automatic drug delivery device includes: a shielded housing forming a first shielded cavity; and a reagent injection assembly, at least a portion of which is disposed within the first shielded cavity. The reagent injection assembly is adapted to connect to a reagent bottle and an infusion device, serving to connect the reagent bottle and the infusion device, and also driving the reagent within the reagent bottle to flow along the reagent injection assembly. This simplifies the injection process and reduces injection costs. The fact that at least a portion of the reagent injection assembly is disposed within the first shielded cavity provides shielding, thereby reducing the radiation hazards of the reagent within the assembly to staff and patients, and effectively protecting their safety.

The utility model discloses a movable industrial X-ray scanner which comprises a driving assembly and a clamping assembly, the driving assembly comprises a placing plate, a movable plate and a hinge rod, the movable plate is arranged at the bottom of the placing plate, the hinge rod is hinged to the bottom of the movable plate, the clamping assembly is arranged on the movable plate and comprises a clamping plate, a movable rod, a driving rod and a driving plate, and the clamping plate is arranged on the movable plate. The clamping plate is arranged at the top of the placing plate, the movable rod is rotationally connected with the bottom of the clamping plate through a rotating shaft, the driving rod is hinged to one side of the movable rod, and the driving plate is hinged to one end of the driving rod. The beneficial effects of the utility model are that the placing table is moved out when the door is opened, and the placing table is moved into the scanning cabinet after the door body is closed, so that an operator does not need to go deep into the scanner to place or take out a detected object, the complexity and inconvenience of operation are reduced, and the operator is prevented from being subjected to potential radiation hazards when operating in the scanner.

The utility model is a purification system for nuclear power radioactive exhaust gas, comprising: a pre-filter, a separator, a first composite separator, a dust filter and a booster fan, the pre-filter air outlet is connected to the separator air inlet through a pipeline, the separator air outlet is connected to the first composite separator first air inlet through a pipeline, the first composite separator first air outlet is connected to the dust filter air inlet through a pipeline, and the dust filter air outlet is connected to the booster fan air inlet through a pipeline. The system can separate solid particles, radioactive waste liquid, aerosol and other impurities contained in the exhaust gas from the gas, thereby achieving the purpose of purifying the gas, avoiding the exhaust gas from carrying radioactive substances to pollute the environment and causing radiation hazards.

The embodiment of the invention relates to the technical field of photon imaging, and discloses an SPECT detector correction method, device, equipment and medium, and the method comprises the steps: carrying out the passive correction of an SPECT detector according to a preset passive energy correction target peak channel address table, so as to obtain a passive energy correction table; the passive energy correction table is used for performing energy correction on gamma photons acted by the SPECT detector when the SPECT detector performs imaging. According to the SPECT detector correction method, device and equipment and the medium, on one hand, correction can be carried out without professionals, doctors or technicians and other users can also carry out correction on the SPECT detector, manpower resources are saved, and on the other hand, ray hazards caused by radioactive sources during correction can be avoided.

The invention provides a polymorphic gaseous tritium on-line measurement system and method, the system comprises a filtering mechanism, a first tritiated water measurement mechanism, an oxidation furnace, a cooler, a second tritiated water measurement mechanism and an air pump, the air inlet end of the filtering mechanism is communicated with an external gas conveying pipeline; the gas inlet end of the first tritiated water measuring mechanism is communicated with the gas outlet end of the filtering mechanism and is used for carrying out enrichment and activity concentration measurement on tritiated water in gas, and the gas inlet end of the oxidizing furnace is communicated with the gas outlet end of the first tritiated water measuring mechanism; the air inlet end of the cooler is communicated with the air outlet end of the oxidizing furnace; the gas inlet end of the second tritiated water measuring mechanism is communicated with the gas outlet end of the cooler, and the second tritiated water measuring mechanism is used for enriching the cooled gas and measuring the activity concentration of non-oxide tritium. And an effective technical support is provided for tritium radiation hazards and tritium leakage hidden dangers of nuclear personnel.

The utility model discloses an array weak magnetic probe welding seam detection device, which belongs to the technical field of nondestructive testing, and comprises a push rod, the surface of the push rod is rotatably connected with a universal joint assembly, the surface of the universal joint assembly is provided with a carriage, the inner wall of the carriage is provided with a non-magnetic rotary encoder, and the non-magnetic rotary encoder is connected with the push rod. The problems that an existing welding seam detection technology has many limitations, although ultrasonic detection has a certain effect on internal defect detection, the sensitivity of surface and near surface defect detection is poor, the result is greatly influenced by experience of detection personnel, internal defects can be clearly presented through ray detection, radiation hazards exist, the cost is high, and the detection efficiency is high are solved. The weak magnetic field detection device solves the problems that the existing weak magnetic field detection device has strict requirements on the detection environment, workpieces need to be cleaned after detection, and in addition, the existing weak magnetic field detection device also has defects, part of probes are unreasonable in structural design, low in detection efficiency and difficult to meet large-scale rapid detection requirements.

The utility model provides a cranial nerve motor dysfunction detection system, which relates to the technical field of cranial nerve motor dysfunction detection and is characterized in that the head of a patient is fixed through a head fixing device, a moving assembly is in sliding connection with an acquisition module, and the acquisition module is adjusted to a proper position; patient facial neural motion image information acquired by the acquisition module does not have radiation, medical indexes with normal or abnormal functions and corresponding video evidences can be provided for doctors, and the problems that in the prior art, the doctors cannot clearly see blink action details due to visual inspection and cannot clearly see blink action details are solved. Radiation hazards are caused by instrument detection.