273 results about "Radiation damage" patented technology

The invention discloses an alloy high-temperature and high-pressure environment simulation method under radiation action based on molecular dynamics, which comprises the following steps: establishing a molecular structure framework of an alloy according to a crystal structure and a lattice constant of the alloy, and setting initial parameters to construct an initial simulation model; performing relaxation operation on the molecular structure model in a high-temperature and high-pressure environment; performing irradiation damage simulation on the relaxed model based on molecular dynamics, selecting a central atom as a primary off-site atom, and setting incident energy and incident direction of the primary off-site atom to simulate atom cascade collision; keeping the incident direction unchanged, and adjusting the incident energy of the primary off-site atoms to obtain defect distribution and defect density under different energies; and analyzing the defect evolution law of the alloy in the high-temperature and high-pressure environment according to the simulation result. According to the method, the alloy material is observed from a microscopic atomic scale, so that a powerful support is provided for simulating a defect evolution process in a high-temperature and high-pressure environment and reflecting atomic collision of the alloy in a real radiation environment.

The invention relates to the technical field of image processing, and discloses a plastic package material defect detection method and system in a radiation environment based on machine vision. The method comprises the following steps: acquiring an anti-radiation image in a gamma-ray environment through a lead-tungsten alloy shielding high-radiation tolerance type image sensor, and performing adaptive contrast enhancement. Defect features including microcracks, bubbles, deformation and chromatic aberration are extracted by using dual-tree complex wavelet transform and an HSV color space; and inputting the multi-dimensional features into an AR-DCNN network to carry out multi-task learning, identifying defect types and carrying out scoring. Based on Weibull distribution and a random forest algorithm, the radiation-resistant life of the plastic package material is predicted, and a material degradation curve and safety threshold early warning are obtained. According to the invention, standardized processing of the radiation damage quantitative index is realized, and the prediction accuracy is effectively improved.

Method for investigating at least one nano-scale biological sample (1), said method comprising a step a) (100) of preparing an embedding liquid (3) containing a plurality of nano-scale biological samples (1) wherein the nano-scale biological samples (1) have a maximum diameter MD wherein MD < = 30 nm, a step b) (200) of preparing a film (2) of the embedding liquid (3) on an electrically conductive substrate (4) in an application zone (22), the substrate (4) is wetted by the embedding liquid (3) in the application zone (22), and wherein the film (2) of the embedding liquid (3) has an average thickness AT, where AT < = 30 nm; step c) (300) adjusting the film (2) on the substrate (4) to a measurement temperature MT, wherein-100 DEG C < = MT < =-1 DEG C; step d) (400) measures at least one of the nanoscale biological samples (1) within the film (2) on the substrate (4) in an electron beam device (32) at a measurement temperature MT, where the at least one nanoscale biological sample (1) is exposed to an electron beam (41, 44). The present invention provides a method for studying nanoscale biological samples, wherein single nanoscale biological samples can be studied in a simple manner at high spatial resolution.

The utility model provides a sub-packaging protection box for medical isotopes and drugs thereof, which comprises a material front chamber, a sub-packaging main chamber and a packaging rear chamber, the packaging rear chamber is divided into an upper layer space and a lower layer space, the lower layer space comprises a lead tank automatic packaging cabin and a radioactive solid waste temporary storage cabin, a buffer chamber I is arranged between the material front chamber and the sub-packaging main chamber, and a buffer chamber II is arranged between the material front chamber and the sub-packaging main chamber. And a buffer chamber II is arranged between the sub-packaging main chamber and the upper-layer space of the packaging rear chamber. According to the split charging protection box provided by the utility model, each functional zone can keep a reasonable differential pressure gradient, and the split charging protection box has the functions of clean ventilation, sterilization and disinfection, on-line monitoring and the like, and meets the requirements of relevant laws and regulations such as GMP (Good Manufacturing Practice) in China on clean environment, on-line monitoring, data auditing and tracking and the like in the production process. And meanwhile, the automatic lead tank packaging and solid waste collecting and storing functions are achieved, operation convenience and safety are improved, and radiation damage to operators is reduced to the minimum.

The invention provides a rare earth silicon germanate scintillating material and a preparation method and application thereof, in particular to a rare earth silicon germanate scintillating material with high thermal stability and strong radiation resistance and a preparation method and application thereof, the general formula of the rare earth silicon germanate scintillating material with high thermal stability and strong radiation resistance is RE2 (1-x-delta / 2) Ce2xGedeltaSi (1-y + delta) Gey-deltaOz, in the formula, 0 lt; x is more than or equal to 0.05, y is more than or equal to 0.15 and less than or equal to 0.5, delta is more than or equal to 0 and less than or equal to 10 <-4 >, z is more than or equal to 4.95 and less than or equal to 5.05, RE represents a rare earth element, and the rare earth element is selected from at least one of lanthanum (La), lutetium (Lu), yttrium (Y) and gadolinium (Gd). The rare earth silicon germanate scintillating material provided by the invention has the characteristics of strong radiation damage resistance, high scintillation light output, low afterglow and the like while greatly improving the thermal stability, and can be used in occasions with extremely high requirements on the thermal stability or radiation resistance of the material, such as high-energy physical experiments, nuclear medicine imaging, oil exploration wells and the like.

The utility model discloses a sample preparation device for detecting the residual rate of the aluminum layer after punching a pit on an aluminum-plastic film, and belongs to the technical field of battery processing. The sample preparation device comprises: a sample table, a clamp, a bracket, a tool holder, a cutter and a magnifying glass. The clamp and the bracket are installed on the sample table, the tool holder and the magnifying glass are installed on the bracket, and the cutter is installed on the tool holder. The clamp is used to fix the aluminum-plastic film, and the cutter is arranged between the magnifying glass and the clamp. The tool holder is rotatably installed on the bracket so that the cutter can move toward the clamp. The utility model cuts the aluminum-plastic film at the position to be inspected by the cutter, and can quickly and effectively test the residual amount of the aluminum layer after punching a pit. The measurement accuracy is high and there is no radiation damage, which solves the problem that the prior art epoxy curing measurement method is time-consuming and labor-intensive and the success rate of sample preparation is low.

The invention relates to a molecular probe for targeting a prostate specific membrane antigen and application, and belongs to the technical field of nuclear medicine. The invention provides a molecular probe for targeting a prostate specific membrane antigen, and the molecular probe successfully obtains a PSMA targeting molecular probe by introducing iodobenzene butyric acid and a PEG4 group on the basis of a PSMA-617 molecular structure on the basis of a double-ligand covalent coupling technology. The molecular probe has the advantages that the residence time of the molecular probe in a tumor area is obviously prolonged, the treatment effect is improved, the requirement for radioactive dose is reduced, and radiation damage to surrounding normal tissues is reduced; the specificity is excellent, a tumor area with high PSMA expression can be accurately targeted, and tumors with different PSMA expression levels can be effectively distinguished; the speed of reaching a target tumor is high, and an ideal imaging effect can be realized only in 20 minutes. In conclusion, the molecular probe has great advantages in diagnosis and treatment of PSMA high-expression tumors, and has high specificity and high efficiency.

The utility model discloses a shielding plugging piece of a synchrotron radiation device beam line station wall outlet hole, which is characterized by comprising a square stepped hole embedded part used for being inserted into the synchrotron radiation device beam line station wall outlet hole, and a lead layer, a polyethylene layer, a lead layer and a polyethylene layer are sequentially filled in the square stepped hole embedded part along the beam direction; the lead layer comprises a plurality of lead bricks with different sizes, the polyethylene layer comprises a plurality of polyethylene bricks with different sizes, each layer of materials are arranged and stacked in a staggered joint manner, and gaps of adjacent layers of materials are not in the same straight line. According to the utility model, bremsstrahlung radiation outside the wall outlet hole at the inner side of the storage ring tunnel can be efficiently shielded, radiation in the storage ring tunnel reaching the downstream of a beam line station through the wall outlet hole is reduced, the radiation dose rate in a downstream experiment hall is further effectively reduced, and workers are prevented from being damaged by radiation.

The invention discloses a single-bond polymer irradiation damage calculation method, device, equipment and medium, and relates to the technical field of polymer irradiation damage calculation, and the method comprises the following steps: determining the microscopic section type of gamma ray and single-bond polymer; the irradiation damage of the gamma ray to the single-bond polymer is equivalent to the action probability of the gamma ray to the covalent bond; according to the bond forming structure data of the different covalent bonds, the bond breaking probability of the gamma ray to the different covalent bonds is obtained; and obtaining the initial free radical concentration according to the total deposition energy and the bond breaking probabilities of different covalent bonds. According to the method, the action probability of gamma rays on extranuclear electrons of nuclide atoms forming covalent bonds in the single-bond polymer is established, distribution of irradiation damage of the gamma rays in the polymer on various covalent bonds can be calculated, and the probability of covalent bond breaking caused by the irradiation damage can be accurately calculated; and the quantitative relation between the free radical concentration and the material absorbed dose is obtained.

The invention discloses an electron beam spot intensity distribution characterization method based on a suspended nano film, and belongs to the technical field of micro-nano machining. In order to solve the problems of radiation damage, poor repeatability, introduction of additional scattering interference and the like in the application of an electron beam lithography machine in the prior art, a suspended nano film structure is mainly manufactured by adopting a standard microelectronic process based on a silicon wafer, and the intensity distribution of electron beam spots is represented through exposure and development. According to the method, on the basis of being compatible with the original electron beam lithography machine process environment, accurate characterization of the electron beam spots is achieved, back exposure is not needed, the process steps are simplified, and interference of electron scattering and edge sputtering is effectively avoided.

The invention relates to the technical field of radiology department, in particular to a medical image reconstruction method and system for radiology department, and the method comprises the following steps: S1, carrying out the collection and preprocessing of multi-modal data; s2, image initial reconstruction based on sparse representation and compressed sensing; s3, deep learning is carried out to enhance the image quality; s4, real-time reconstruction and image post-processing are carried out; through the multi-modal sensor fusion and deep learning enhancement technology, the resolution, contrast and definition of medical images are remarkably improved, artifacts and noise are reduced, more accurate and clearer diagnosis basis is provided for doctors, early-stage minimal lesions can be found, diagnosis accuracy is improved, and the diagnosis efficiency is improved. A low-dose X-ray detector and ultrasonic sensor fusion technology is introduced into CT imaging, so that the radiation dose of X-rays can be effectively reduced on the premise of ensuring the image quality, radiation injury to a patient due to frequent examination is reduced, and the medical safety is improved.

The invention discloses a position precision compensation method for an irradiation-resistant absolute photoelectric encoder. The position precision compensation method mainly comprises a dual-sensing Kalman filtering method and a Double Deep Q-Network reinforcement learning method. The dual-sensing module of the photoelectric encoder can start the auxiliary sensor after the main sensor is damaged due to radiation damage, so that the overall radiation resistance of the encoder is improved. According to the method, position data obtained by the auxiliary sensor is used as parameters of a state estimation equation in the double-sensor Kalman filtering method and used for compensating position errors of the main sensor in radiation damage, and hyper-parameters in the Kalman filtering algorithm are optimized through the DDQN reinforcement learning method. According to the position precision compensation method for the radiation-resistant absolute photoelectric encoder, the radiation resistance of the absolute photoelectric encoder can be improved, precision reduction caused by radiation damage is compensated, and the problem of position loss occurring when a main sensor is switched to an auxiliary sensor is solved.

The present invention discloses an intelligent infrared radiation recognition method for the damage and failure state of coal and rock under load, belonging to the field of water-preserved mining and strata control. Using the infrared radiation monitoring technology of coal and rock, from the perspective of computer vision, first obtain the stress-strain and infrared radiation time series data during the damage and failure process of coal and rock under load, and establish an infrared radiation grayscale image classification data set for different progressive damage and failure stages based on the crack strain model method; build a convolutional neural network CNN classifier, input the prepared data set into the CNN model for training; finally, use the trained model for the intelligent recognition of the damage and failure stage of coal and rock under load. It realizes non-destructive and real-time intelligent monitoring and judgment of the damage and failure stage of coal and rock under load, and has certain practical significance for infrared radiation damage monitoring and early warning in mining engineering and geotechnical engineering.

The invention discloses a particle implantation system based on external mechanical arm needle withdrawal and a using method thereof.The particle implantation system comprises a radioactive source implantation machine, a needle withdrawal robot, a needle withdrawal device and an external device for guiding and / or clamping a puncture needle, and the radioactive source implantation machine is connected with the puncture needle through a conveying catheter; the radioactive source implanting machine can convey a radioactive source to the puncture needle along the conveying catheter so as to output the radioactive source from the front end of the puncture needle and implant the radioactive source into a target object, the needle withdrawing device comprises a base and a clamping mechanism, the clamping mechanism is used for clamping or hooking the puncture needle, and the needle withdrawing robot realizes the movement of the needle withdrawing device in at least three degrees of freedom in the space. And the needle pulling robot drives the needle pulling device to move in the axial direction of the puncture needle, so that the puncture needle is pulled out by a target distance. The needle withdrawing precision of the puncture needle and the implantation effect of the particles in the radioactive particle implantation operation can be guaranteed, and radiation injury to doctors is reduced.

The invention relates to the technical field of biomedical materials, in particular to hydrogel as well as a preparation method and application thereof. The hydrogel is obtained by crosslinking a polymer framework material, a functional additive and a shielding agent, the polymer framework material comprises any one or more of gelatin, carboxymethyl chitosan, hyaluronic acid, chitosan, collagen, polyvinyl alcohol, sodium carboxymethyl cellulose and sodium alginate; the functional additive comprises any one or more of tannic acid, tea polyphenol, vitamin C and procyanidine; the shielding agent comprises any one or more of barium sulfate, bismuth simple substance and bismuth-containing compound. The hydrogel provided by the invention can effectively isolate radiotherapy rays, reduce oxidative stress reaction, provide a protective barrier for normal tissues in a radiotherapy process and reduce radiation damage, has excellent tissue repair promotion capability, is safe in components, fast in metabolism and adjustable in flowability and adhesion, and is more beneficial to adaptation in rectum or skin tissues.

The present application relates to the field of medicine, and particularly to the application of schisantherin B in the preparation of a medicine for preventing or treating radiation damage of the intestinal tract. The present application finds that schisantherin B has a protective effect on the intestinal tract after irradiation, and experiments prove that schisantherin B can reduce the pathological damage degree of the intestinal tract after irradiation, including increasing the length of intestinal villi and the number of crypts, maintaining the stability of the intestinal mucosal barrier, reducing the content of inflammatory factors in the intestinal tissue, restoring the activity of the intestinal epithelial cells after irradiation, and inhibiting the apoptosis. Meanwhile, schisantherin B can reduce the iron death caused by irradiation. Therefore, schisantherin B has a wide application prospect as a potential radiation protection agent in the treatment of radiation-induced intestinal injury and drug development.

The utility model provides an interactive experience teaching aid simulating a level gage for science popularization. The interactive experience teaching aid comprises an experiment container and a U-shaped pipe communicated with the bottom of the experiment container. The immersion liquid sensor is arranged on the side of the U-shaped pipe, and a sensing head of the immersion liquid sensor can be inserted into the U-shaped pipe; the simulated radioactive source and the simulated detector are detachably connected with the container support frame of the experimental container; the experiment container is communicated with a U-shaped pipe, so that the experiment container is flush with the liquid level of an inner cavity of the U-shaped pipe, when the amount of the injected liquid material reaches a threshold value set for science popularization demonstration teaching, an induction head of the immersion inductor makes contact with the liquid material in the inner cavity of the U-shaped pipe, and then the immersion inductor sends a signal to the simulated detector electrically connected with the immersion inductor. The buzzer and the light of the simulated detector flicker to remind an operator that injection of liquid materials is stopped when the threshold value set by teaching is reached, and the simulated radioactive source is only the same as a real radioactive source in appearance and does not have radioactivity, so that radiation damage to the operator is avoided.

The application discloses an online proton imaging ion spectrometer diagnosis system, relates to the fields of plasma physics and nuclear detection, and comprises an online proton imaging module, an online Thomson ion spectrometer module and a shielding aiming module; the shielding aiming module comprises a shielding cavity and an aiming laser pen; the online proton imaging module comprises a metal filter, a first scintillator and two proton imaging acquisition assemblies; the proton imaging acquisition assembly comprises a first optical fiber panel attached to the first scintillator and a first CMOS sensor attached to the first optical fiber panel; the online Thomson ion spectrometer module comprises an ion beam deflection mechanism and an ion spectrum diagnosis acquisition assembly; the ion spectrum diagnosis acquisition assembly comprises a light-proof aluminum film, a second scintillator, a second optical fiber panel and a second CMOS sensor which are sequentially and superposedly arranged. The application reduces the size of the whole system, can simultaneously carry out online proton imaging and ion energy spectrum diagnosis, and can effectively prevent radiation damage to the CMOS chip.

The invention discloses application of ellagic acid in preparation of a medicine or a biological product for preventing or relieving ultraviolet radiation damage and aging, and belongs to the technical field of biological medicine and radiation protection. Experimental verification shows that ellagic acid with effective concentration can promote expression of antioxidant related genes, reduce expression of inflammation response genes and expression of apoptosis related genes, eliminate active oxygen and inhibit lipid peroxidation reaction, so that oxidative damage, inflammatory reaction and apoptosis caused by ultraviolet radiation are effectively relieved, and the anti-inflammatory effect of ellagic acid is improved. The stress tolerance of an organism is improved, and the aging health risk induced by ultraviolet radiation is relieved; the medicine or biological product can be applied before and / or after exposure of ultraviolet radiation, and is suitable for preventing or relieving oxidative damage and cell aging caused by ultraviolet radiation. The invention provides a new way for developing safe and effective ultraviolet radiation protection and anti-aging preparations.

The invention relates to an evaluation method and system for a non-metallic material irradiation damage effect. The evaluation method comprises the following steps: constructing a geometric model according to material attributes of the non-metallic material, wherein the material attributes comprise chemical bonds; performing a simulation irradiation test on the geometric model by using a preset irradiation simulation environment and a preset irradiation physical model; calculating the bond breaking probability of the chemical bond according to the energy deposition information in the simulated irradiation test process; and obtaining the damage index of the non-metallic material according to the bond breaking probability. The evaluation efficiency and accuracy of the irradiation damage effect of the non-metallic material in the complex irradiation environment can be improved.

The application discloses a method, device and equipment for detecting the operation state of a ventricular assist device, and belongs to the technical field of medical instruments. The ventricular assist device comprises a driving device and an intervention pump. The driving device is used for driving the intervention pump to operate. The method comprises the following steps: acquiring current data of the driving device in a working state; in the case that the current data indicates that the load of the driving device is increased, performing operation state classification identification on the ventricular assist device according to the change condition of the current data in a first time period; and issuing alarm information corresponding to an identification result, wherein the identification result indicates an abnormal operation state causing the load increase. The method can timely prompt the cause of the abnormal load increase without the aid of a medical contrast imaging device, realizes automatic identification of the abnormal operation state, reduces the safety risk and protects the life safety of an assisted object, and reduces the radiation damage to the human body when the medical contrast imaging device is working.

The method comprises the following steps: locally heating the inner wall of an oil pipe by using an electromagnetic coil, and recording the temperature change of the inner wall of the oil pipe through a temperature probe at the position where the center of the electromagnetic coil clings to the wall of the oil pipe; the oil pipe casing pipe is filled with water, when the water in the oil sleeve annulus flows at different flows, the relation between the flow and the temperature change of the inner wall of the oil pipe is obtained, and instrument calibration is completed; measuring points are carefully selected, the oil pipe is heated, and the corresponding flow outside the pipe is obtained according to the obtained instrument scales. By measuring the flow velocity outside the oil pipe, personnel can be prevented from radiation injury during well logging, a method for measuring the flow velocity outside the pipe by using an isotope radioactivity method is completely eliminated, the well logging precision is improved, and the quality is improved.

The application provides a heterojunction bipolar transistor defect detection method, which comprises the following steps: acquiring a C-V curve and a 1 / C 2 -V curve of a heterojunction bipolar transistor at a preset voltage; determining the change of the C-V curve and the 1 / C 2 -V curve in a first preset voltage range; and controlling a C-V test module or an I-V test module of deep level transient spectroscopy to detect defects of the heterojunction bipolar transistor according to the change. The heterojunction bipolar transistor defect detection method has the beneficial effects that the different test modules of deep level transient spectroscopy can detect the defect types and defect states of the heterojunction bipolar transistor, and the internal defect properties and radiation damage mechanisms of the heterojunction bipolar transistor can be analyzed in depth.

The utility model relates to a medical scanning system and a water mold tool for SPECT correction of the medical scanning system. Comprising a water mold, a skeleton and a radioactive source. The framework comprises a plurality of supporting pieces, the supporting pieces are connected with one another and define a polyhedral geometric structure with a containing cavity, and the water mold is arranged in the containing cavity; the radioactive source comprises a long line source, a point source and a short line source, one of the long line source, the point source and the short line source is selected to be arranged on the framework, and the long line source is longer than the short line source; wherein the support piece comprises a first support piece, the length of the first support piece is adjustable, a fixed point is formed at the joint of any two connected support pieces, and one of the long line source, the point source and the short line source is selectively fixed on the first support piece or the fixed point. According to the water mold tool, uniformity calibration of the probe or the collimator, registration correction of the SPECT equipment and the CT equipment and posture and sensitivity correction of the probe can be achieved at the same time, time and labor are saved during calibration, and radiation damage to operators can be reduced.

The utility model discloses an anti-radiation screen for shaking up a PET quality control model, which is provided with an anti-radiation door, a shaking-up device and a bottle rack, an operator can drive a shaking-up transmission mechanism through a driving piece of the shaking-up device to shake up the bottle rack and the quality control model in the bottle rack, and the shaking-up transmission mechanism can drive the shaking-up transmission mechanism to shake up the bottle rack and the quality control model in the bottle rack in the shaking-up process. An operator and a driving part are located right in front of the radiation-proof door, and the radiation-proof door can be utilized to avoid radiation injury of a radioactive isotope 18F solution in the quality control model located right behind the radiation-proof door to the operator. Therefore, the safety of the shaking operation of the quality control model can be improved, and the problem of misoperation when the quality control model is shaken up manually is avoided. Moreover, compared with a manual shaking-up quality control model, the shaking-up device adopted by the utility model has the advantages that the radioactive isotope 18F solution can be mixed more uniformly, the shaking-up action is stable, the transmission efficiency is high, the physical strength is saved, and no noise is generated.

The invention relates to the technical field of terminal sterilization and filtration in a radiopharmaceutical preparation process, in particular to a filter membrane sterilization and filtration device and system. Comprising the steps that a state sensing module collects liquid medicine radioactive activity data and filter membrane structure strain data and generates real-time data flow; the twinborn modeling module constructs a filter membrane digital twinborn body, and outputs an accumulated radiation damage prediction result through data assimilation; the prediction decision module generates a filtering parameter optimization sequence by using a deep reinforcement learning agent; the control execution module adjusts the flow velocity of the liquid medicine through fuzzy self-adaptive PID control and feed-forward compensation; and the verification feedback module performs an integrity test and transmits data back to the twin modeling module to realize model parameter correction. All the modules form a closed-loop control system through a high-speed data bus, so that the damage of radiation to a filter membrane material is effectively inhibited, and the integrity and the sterile guarantee level of a membrane structure in the filtering process are maintained.

The invention discloses application of ellagic acid in preparation of a medicine for preventing or treating ionizing radiation injury, and belongs to the technical field of biological medicine and radiation protection. Experiments prove that ellagic acid with an effective concentration can inhibit lipid peroxidation, enhance the activity of glutathione transferase and superoxide dismutase and promote the expression of antioxidant related genes such as sod-1, sod-2, gst-1 and gst-29 and immune related genes such as lys-1, irg-1, irg-2 and mul-1, so that the ellagic acid with an effective concentration can inhibit lipid peroxidation and improve the activity of glutathione transferase and superoxide dismutase. Therefore, oxidative damage, inflammatory response, reduced stress tolerance, accelerated aging and shortened service life caused by ionizing radiation exposure are relieved, and the compound can be applied to preparation of drugs for preventing or treating ionizing radiation damage and is suitable for nuclear accident emergency protection, space radiation protection of astronauts and adjuvant therapy of tumor radiotherapy patients. The invention provides a theoretical basis for developing an efficient and low-toxicity ionizing radiation protective agent based on ellagic acid, and has a wide application prospect.

A kind of quick bag sealing device and method for narrow space radioactive atmosphere isolation, including quick detachable inspection area, equipment back loading area, disassembly operation area;Wherein quick detachable inspection area, equipment back loading area, disassembly operation area all have sealing;And the top of quick detachable inspection area, equipment back loading area is equipped with crane hook reserved interface;Disassembly operation area side has PE operation glove, bottom has operation hole reserved interface.This application can significantly reduce the risk of radioactive material leakage by effective sealing mechanism, protect the operating personnel from radiation damage, while preventing radioactive aerosol from polluting the external environment.Using multiple sealing technology, including buckle and heat sealing, ensures zero leakage of radioactive atmosphere, meets strict radiation protection standards.Effective sealing and isolation measures reduce the possibility of radioactive material release into the environment, help maintain ecological safety.

The invention provides a strain capable of resisting radiation damage as well as a product and application thereof, and relates to the technical field of probiotics capable of resisting radiation damage. The probiotic strains are separated from healthy breast milk and comprise lactobacillus gasseri LG02, lactococcus lactis LL6 and bifidobacterium adolescentis BA18, and the three probiotic strains can improve the survival rate after ionizing radiation; the LG02 or LL6 strain relieves damage of ionizing radiation to tissue structures of the heart, the liver, the spleen, the lung, the kidney, the stomach, the small intestine, the colon and the femur, the physiological function of an organism is maintained, and recovery of the tissue structures is accelerated; the LG02 or LL6 strain accelerates the body repair after radiotherapy, reduces the side reactions of diarrhea, stomachache, constipation and cough, and reduces the incidence rate of hematochezia and radiation pneumonitis; the LG02 or LL6 strain increases or recovers the number of leukocytes, and improves the hematopoietic ability and immunity of the organism; the LG02 or LL6 strain has the effects of inhibiting harmful bacteria, improving the anti-infection and anti-inflammation capability of the body and improving the resistance; the LG02 or LL6 strain can improve the oxidation resistance of the body and enhance the aging resistance of the body.

The flexible needle pulling mechanical arm comprises a needle pulling device and a mechanical arm body, the needle pulling device comprises a base and a clamping mechanism, the clamping mechanism is used for clamping or hooking a puncture needle, and the free end of the base is connected with the clamping mechanism through a flexible extension rod; the mechanical arm realizes the movement of at least three degrees of freedom of the needle pulling device in the space, and drives the needle pulling device to move in the axial direction of the puncture needle, so that the puncture needle is pulled out by a target distance; a supporting adjusting mechanism is further arranged at the free end of the base, and the supporting adjusting mechanism conducts axial supporting operation on the flexible extension rod before the clamping mechanism and the puncture needle are in butt joint, so that the flexible extension rod is in a hard supporting state, and accurate butt joint of the clamping mechanism and the puncture needle is achieved; after the clamping mechanism and the puncture needle are in butt joint, the supporting and adjusting mechanism can enable the flexible extending rod to restore to the flexible state. According to the needle withdrawing device, the needle withdrawing operation efficiency and the needle withdrawing operation effect in the radioactive particle implantation operation can be guaranteed, and radiation injury to doctors is reduced.