46results about How to "Avoid exposure to radiation" patented technology

The invention relates to a registration and navigation method based on a three-dimensional point cloud of bones, which is characterized in that: based on DICOM data images, a virtual coordinate system of X, Y, and Z three-dimensional point clouds is formed. At the same time, the robot can pass through the probe to achieve balanced data collection on both sides of the bone, and establish the X, Y, Z three-dimensional midpoint cloud world coordinate system. In the X, Y, Z three-dimensional point cloud virtual coordinate system and the world coordinate system dynamic fast registration navigation calculation, including acceleration for rigid registration and flexible registration. Finally, the parameters such as navigation position and angle are corrected. As a result, the robot can realize dynamic registration and navigation of X, Y, and Z three-dimensional point clouds, solve the current problems of unsatisfactory registration accuracy and excessive ray exposure, improve navigation accuracy and efficiency, and make the registration and navigation accuracy of orthopedic robots ≤ 0.5 mm, can avoid radiation exposure and further improve navigation accuracy. The method provided by the invention can be realized by cooperating with software programming, which meets the requirement of automatic implementation and adjustment.

A chemical liquid injection system with which a chemical liquid in a chemical liquid container can be directly injected into a patient without using an intervening liquid syringe or the like.A trailing end of chemical liquid injection tube 120 that its leading end is connected to the patient is placed at a lower position within chemical liquid container 200. A leading end of liquid supply tube 110 is placed at a upper position within chemical liquid container 200 and a trailing end of liquid supply tube 110 is connected to liquid container 300. Since liquid pressure-feeding mechanism 131 feeds the liquid in liquid container 300 into chemical liquid container 200 from liquid supply tube 110 with pressure, the chemical liquid is directly injected into the patient from chemical liquid container 200 through chemical liquid tube 120.

The invention relates to an autonomously controllable pull wire injection catheter comprising an outer catheter guide having an outer catheter guide casing and an inner operating catheter having an inner operating catheter casing, wherein the inner operating catheter comprises a catheter handle, a catheter tip, at least one needle that is connected to at least one source of medicinal solution viaat least one needle channel, at least one contact force sensor, at least one electrode, at least four actuator driven pull wires for moving the tip of the inner operating catheter, wherein the inner diameter of the outer catheter guide casing is larger than the outer diameter of the inner operating catheter casing, wherein the inner operating catheter is adapted to be controlled by a microcontroller, wherein the at least one electrode and the at least one contact force sensor are adapted for data exchange with the microcontroller, and wherein the at least four actuator driven pull wires are attached inside the inner operating catheter perpendicular to each other at a pre-defined distance from the tip in the distal region. The invention also relates to a robotic system comprising said autonomously controllable pull wire injection catheter and a method for operating the same.

The invention provides a steering gear applied to a high temperature gas cooled reactor. The steering gear comprises a box body component, a power component, a shaft seal connecting component and a rotor component, wherein the shaft seal connecting component also having the function of steering shielding is arranged; the box body is provided with a first straight through hole and a first side through hole; the rotating drum of the rotor is provided with a second straight through hole and a second side through hole; the inclined angles of the axle of the second straight through hole and the second side through hole is equal to the included angle of the axle of the first straight through hole and the first side through hole, so that a straight through ball path and a side through ball path which can be mutually switched according to rotation of the rotor are formed. The steering gear has the function of ball flow distribution that one is divided into two, is simple in structure and small in pipeline mounting space, and the requirements on reliability in long-term operation in a strong radiation working environment are met.

The invention discloses a reference temperature T0 test method for an irradiated RPV steel 0.5T-CT sample. The method includes the steps of: S1. sample installation; S2. test execution; S3. sample pre-cracking inspection; and S4. data analysis. The method provided by the invention selects irradiated RPV steel 0.5T-CT sample as the research object, makes a reasonable and reliable reference temperature T0 test method that is carried out under the circumstance of very strong gamma rays, the whole test process adopts manipulator operation, avoids radiation of workers in the operation process, meets the radiation protection requirement, and improves postirradiation examination means and technological reserve.

An X-ray fluoroscopy and imaging and apparatus prevents error in a foot switch having a sensor. The detection sensor detects whether the operator is contacting each switch installed on the foot-switch. The information detected by the sensor is displayed as a textual format and / or an image that are visually recognizable, so that the operator can confirm the accuracy of a contacted-switch indication. Accordingly, the operator can comprehend instantly and accurately information relative to the switch currently selected.

The invention discloses a foot-ankle fixator for osteotomy around knee joint, comprising a base and a fixator, wherein, a height adjusting assembly is arranged on the base, a universal ball is arranged on the top of the height adjusting assembly and a pressing bolt for tightening or loosening the universal ball, a connecting rod is fixed on the universal ball, and the bottom of the fixator is fixedly connected with the connecting rod. A fixture includes a fixture base plate, one end of the fixture bottom plate is provided with a heel support plate, A first fixing plate and a second fixing plate are spaced apart on both sides of the top of the fixture bottom plate, Between that two side of the first fixing plate and between the two sides of the second fixing plate are connected powerful line adjusting crossbars, a plurality of grooves are distribute on the force line adjusting crossbars at intervals, a plurality of protrusions are arranged on both sides of the bottom of the fixer bottomplate, and two protrusions adjacent to each other form bandage winding grooves. The invention can not only ensure the accuracy of the target force line measurement of the affected limb in the osteotomy around the knee joint, but also enable the operator to avoid the harm of radiation exposure, save the human resources and have high practicability.

The invention relates to a red blood cell average life detection method based on HbA1c and blood glucose concentration as sensing variables, which comprises the following steps: (1) measuring the concentration HbA1c (%) and the blood glucose concentration [G] of HbA1c in blood sample blood, (2) substituting the measured HbA1c (%) and blood glucose concentration [G] into a formula to calculate thered blood cell average life MRBCl,wherein MRBCl is the average life of red blood cells in a blood sample, HbA1c (%) is the concentration of glycosylated hemoglobin in blood, [G] is the concentration of blood glucose, and K is a correction coefficient. Compared with the prior art, the method provided by the invention has the advantages of simple operation, time and labor saving, low cost, low sample demand, avoidance of potential radioactive exposure, infection and allergic harm, avoidance of numerous influence interferences and the like, and has wider adaptability.

The invention discloses a radiography assisting apparatus suitable for radiography department. The radiography assisting apparatus suitable for the radiography department comprises support feet; two horizontal plates are arranged at the tops of the support feet; a lying board is fixed on the two horizontal plates; a lying mattress is placed on an upper surface of the lying board; a sliding assembly A is arranged, along the x-axis, at the bottom of the lying board; a support is vertically arranged at the top of the sliding assembly A; a sliding assembly B is arranged, along the y-axis, at the top of the support; a telescopic assembly is arranged, along the z-axis, at the bottom of the sliding assembly B; and a swing assembly is arranged at the end of the telescopic assembly. When the radiography assisting apparatus is in operation, the sliding assembly A, the sliding assembly B, the telescopic assembly and the swing assembly mutually cooperate so as to achieve the purpose of pressing stoma, thereby avoiding unnecessary exposure of medical staff to radiation due to requirement of manual pressing.

The invention relates to a vehicle detection system. The system comprises a barrier gate, a vehicle detection unit, a license plate recognition unit, a ray scanning unit, an inspection unit and a control center unit. The barrier gate comprises a barrier gate 1 arranged at the entrance of a passage and a barrier gate 2 arranged at the exit of the passage. The vehicle detection unit comprises a vehicle detection unit 1, a vehicle detection unit 2, a vehicle detection unit 3 and a vehicle detection unit 4. The inspection unit is used to acquire and display the internal image of a vehicle compartment for a staff to inspect. The control center unit is used to receive state information of the barrier gate, vehicle information, license plate information and internal image information of the vehicle compartment, associate and storage the vehicle information, the license plate information and the internal image information of the vehicle compartment. The control mode of the control center unitcomprises a vehicle-one inspection mode and an anti-reverse detection mode. The vehicle detection system is provided with a plurality of operation modes, multiple detections and linkage protection measures to prevent field staffs from entering a detection area to be irradiated with radiation.

The invention discloses a radiation protection system for the image section. The radiation protection system is capable of performing radiographic examination and protection for a patient suffering from the radiographic examination; a protection control system is connected with the radiation protection system and used for controlling the radiation protection system and performing radiation protection for medical staff. The radiation protection system for the image section provides the maximum radiation protection to the medical staff, the influence of harmful radiation factors and product thereof in the surrounding environment on an operator can be effectively removed, a comfortable operation environment is created, and the medical staff can be reminded to reasonably handle the radiation quantity in a shield room and effectively avoid on real time; the intelligent degree is improved, thus the maintenance cost is decreased, the service life is prolonged, and the damage of ray to human body can be minimized; meanwhile, a fixed perspective viewport and a movable perspective viewport in the radiation protection system can perform protection; other healthy tissue and organ of the patient can be avoided radiation with a lead shield, and thus the pain of the patient can be relieved.

The invention discloses a dynamic sealing device of a reactor top cover of a heavy metal cooling reactor. The dynamic sealing device comprises a base, an electrical heating system, a reactor top plug cock and a top bolt, wherein an annular dynamic sealing groove is formed in the top of the base; a bismuth-tin alloy is placed in the dynamic sealing groove; one end of the electrical heating system is inserted into the bismuth-tin alloy in the dynamic sealing groove; the reactor top plug cock is used for bearing a refueling mechanism; at least one groove-shaped edge is formed in the reactor top plug cock; the groove-shaped edge is matched with the dynamic sealing groove in the base and is inserted into the bismuth-tin alloy in the dynamic sealing groove; the top bolt adopts a hollow structure and is used for sealing and fixing a temperature sensor; a thermocouple in the temperature sensor is inserted from the middle of the bolt into the dynamic sealing groove and is immersed in the bismuth-tin alloy. The invention also discloses a corresponding method. Through the adoption of the dynamic sealing device of the reactor top cover of the heavy metal cooling reactor, the sealing performance of the reactor top plug cock can be improved, and the safety performance of the reactor can be enhanced.

The invention discloses an anti-radiation automatic flaw-inspecting machine comprising a detecting platform, a flaw-inspecting platform, a feeding platform, a conveying device, a discharging platform,a discharging device and a mechanical arm clamping device. The feeding platform and the discharging platform are located on the two sides of the detecting platform correspondingly. The flaw-inspecting device is arranged on the upper side of the detecting platform. The conveying device is arranged between the flaw-inspecting device and the discharging platform. The mechanical arm clamping device is arranged among the feeding platform, the flaw-inspecting device and the conveying device. The discharging device is arranged at the connection position between the tail end of the conveying device and the discharging platform. Compared with the prior art, the anti-radiation automatic flaw-inspecting machine has the beneficial effects that by the adoption of the mechanical automation technology,labor productive power is freed, the situation that people make contact with radiation is avoided; and meanwhile, the overall structure of the anti-radiation automatic flaw-inspecting machine has goodanti-radiation performance, and the protective capacity of the anti-radiation automatic flaw-inspecting machine is better improved.

The invention discloses a pulmonary nodule positioning method. The method comprises the following steps: S0, determining the position of a pulmonary nodule in a lung; s1, establishing a thoracic three-dimensional model; s2, marking a virtual puncture positioning point; s3, marking the position of the pulmonary nodule on the surface of the lung. According to the positioning method of the pulmonary nodule, accurate positioning and real-time registration are performed on the CT three-dimensional reconstruction image and the thoracoscope image by virtue of a computer-aided diagnosis technology and a computer deep learning model based on artificial intelligence, so that accurate positioning of the pulmonary nodule is realized. Meanwhile, interventional or radiative positioning steps harmful to the human body of the patient are reduced, complications after positioning can be reduced, and the positioning cost is reduced.

The invention provides an automatic bone cement propelling device and a bone cement filling method, and relates to the technical field of medical equipment.The automatic bone cement propelling device comprises an automatic driving device and a bone cement propelling device.The bone cement propelling device comprises a piston used for propelling bone cement into cancellous bones with osteoporosis and osteolysis change of the human body; the automatic driving device can drive the piston to move, the automatic driving device is provided with a plurality of pushing gears, and the pushing force of the automatic driving device is different when different pushing gears are adopted. According to the automatic bone cement propelling device provided by the invention, controllable and continuous automatic propelling of the bone cement is realized when medical personnel are far away from an operating table and under strict radiation protection, and long-time ray radiation of the medical personnel in a traditional operation is avoided; and different pushing gears can be selected according to the preoperative bone destruction degree, so that the bone cement injection safety and the operation quality are greatly improved.

The invention relates to an automatic production method of an [18F] aluminum fluoride and NOTA labeling method. By reforming an existing domestic module PET-MF-2V-IT-I, a one-pot one-step method is used to automatically complete the complexing labeling of [18F]ALF and NOTA, a reaction solution obtains a high-purity imaging agent through two different separation methods of semi-preparative HPLC orsolid phase extraction, so that radioactive exposure is avoided, and high-dose production and clinical application of 18F-ALF-NOTA tracer agents are ensured.

The invention discloses a spent fuel storage tank vacuumizing method and system. The method comprises the steps: obtaining vacuumizing setting parameters which comprise a target vacuum degree value and / or a target vacuumizing rate; acquiring a current vacuum degree value,acquired by a vacuum meter, in a spent fuel storage tank and a current valve opening degree, acquired by a detector, of a vacuumizing regulating valve of the spent fuel storage tank, and determining a driving parameter according to the current vacuum degree value, the current valve opening degree and the target vacuum degree value; and outputting the driving parameter to a driving device, driving a valve rod of the vacuumizing regulating valve of the spent fuel storage tank to move through a driving shaft, and adjusting the valve opening degree of the vacuumizing adjusting valve.

The invention relates to a shielding device for radioactive sample neutron residual stress measurement. The shielding device for the radioactive sample neutron residual stress measurement comprises a device main body (1), the device main body (1) is of a three-layer box-type combined structure, and a middle box (2) is internally provided with a hollow area (3) used for containing a sample clamping device body (4); an incidence pore channel (5), an emergent pore channel (6) and a diffraction pore channel (7) are formed in the side wall of the middle box (2), and the incidence pore channel (5), the emergent pore channel (6) and the diffraction pore channel (7) are all communicated with the hollow area (3). The shielding device for the radioactive sample neutron residual stress measurement not only meets the measurement of radioactive sample three-dimensional lossless depth residual stress but also meets the safety requirement on radioactive sample radiation shielding, and the convenience and the practicability are achieved.

The invention discloses a radioactive substance detection device, comprising: an online detector which comprises a mobile shielding frame body; shielding tools which are mounted on the movable shielding frame body and are provided with detection channels; and detection probes which are mounted on the shielding tools and located at the top ends of the detection channels, and are connected with a data processor through a data line. The device is reasonable in design and simple in structure. The online detector is reasonably designed, and the plurality of shielding tools are arranged on the online detector. The shielding tools enable workers to conveniently drain radioactive substances to the closed detection channels, and the detection probes conduct qualitative or quantitative detection on the radioactive substances in the detection channels. In the process, radioactive substances cannot leak, and the personal safety of workers is guaranteed. A to-be-detected material is detected circularly, the mass or the size of the to-be-detected material cannot be changed in the process, and the detection efficiency and the detection accuracy are higher.

The invention relates to the field of radiation measurement and nuclear electronics, and provides a containment pressure relief and exhaust activity monitoring system, which comprises a safety valve used for active pressure relief, a snakelike segmented cascade filter used for steam-water separation and aerosol filtration, a high-temperature flowmeter used for flow measurement and a detection device used for activity concentration measurement. The safety valve is communicated with a containment vessel, gas is subjected to pressure relief from the containment vessel through the safety valve and flows through the snakelike segmented cascade filter to realize gas-water separation and aerosol filtration, the filtered gas is measured by the flowmeter and then is measured by the detection device through the measuring pipe section, and the detection device gives radioactive activity concentration information. The monitoring system provided by the invention can effectively realize nuclear signal acquisition, processing, uploading and storage in a high-temperature, high-pressure and high-radiation environment, and solves the problems that a radiation monitoring system loses efficacy and radioactivity is difficult to measure in the high-temperature, high-pressure and high-radiation environment in the containment vessel.

The invention discloses a low-temperature sterilization device for food production. The low-temperature sterilization device comprises a workbench, a sterilization box and a control cabinet are arranged on the outer surface of the upper end of the workbench, the control cabinet is located on one side of the sterilization box, and an exhaust device is arranged on the outer surface of the upper end of the sterilization box. According to the low-temperature sterilization device for food production, through the arrangement of a material storage device, a material storage outer shell, a protection plate, a movable cover plate, a handle, a material storage box and moving wheels, a discharge port can be protected, radiation is prevented from being transmitted out, meanwhile, sterilized products can be stored, and the sterilization effect is good. Through the arrangement of a staggered conveying device, an upper conveying belt, a lower conveying belt, a driving roller, a transmission chain and a synchronous driving device, the positions and postures of products can be adjusted when the products are sterilized, the food sterilization effect is improved, and the equipment is simple in structure and convenient to operate and brings better use prospects.