42 results about "Radioactive particles" patented technology

The invention discloses a multi-channel radioactive source implantation system with a needle withdrawing driving function, which comprises a push rod output channel, a push rod, a push rod driving mechanism, a first connecting part, a first motion platform and a needle withdrawing driving mechanism, and is characterized in that the push rod pushes a radioactive source arranged in front of the push rod to be output along the push rod output channel; the first connecting part and one end of the push rod output channel are arranged on the two sides of the first moving platform respectively, the needle pulling driving mechanism and one end of the push rod output channel are arranged side by side, and the first moving platform drives one end of the push rod output channel and the needle pulling driving mechanism to move relative to the first connecting part. The push rod output channel is butted with different hole sites through the relative movement of the push rod output channel and the first connecting part, so that multi-channel implantation of radioactive particles is realized; the puncture needle is automatically pulled out through the needle pulling driving mechanism, the implantation precision and the implantation effect are improved, full-automatic operation is achieved, the radiation risk is avoided, the operation time is short, the structure is simple and reasonable, and driving is convenient and fast.

The present application relates to a kind of nuclear power plant surge line nozzle heat shield sleeve structure and system, comprising: support ring, fluid distribution cover, heat shield sleeve, nuclear power plant surge line nozzle and cladding layer.The nuclear power plant surge line nozzle heat shield sleeve structure and system described above when actually used, through the one end of support ring and the cladding layer of surge line nozzle connection, the other end and fluid distribution cover connection, the one end of heat shield sleeve is inserted into support ring and is connected with support ring, to form gap between the other end of heat shield sleeve and the safety end of surge line nozzle, radioactive particles generated in the annular space between heat shield sleeve and surge line nozzle during reactor operation can be discharged from the gap, thereby avoiding the difficulty and cost of in-service inspection caused by the fact that the safety end of heat shield sleeve surge line nozzle forms a sealed space, so that the risk of high radiation faced by inspection and maintenance personnel is reduced.

This invention discloses a radioactive particle strip implantation system and method, relating to the field of medical device technology. It includes: an implantation gun and a particle strip module; the implantation gun includes: a gun body; a drive assembly disposed within the gun body, including a driver and a thrust control unit; a push rod, drively connected to the power output end of the driver; a particle strip placement slot disposed at the front end of the gun body for placing the particle strip module, and coaxially arranged with the push assembly; the gun body has a docking part at the front end of the particle strip module compartment for connecting an implantation needle; the push rod can pass through the particle strip module to push the particle strip into the implantation needle; the particle strip module includes: a module body; multiple radioactive particles and multiple hemostatic drug units are pre-sealed in an alternating arrangement within the module body; the radioactive particles and hemostatic drug units are coaxially arranged and can be pushed into the implantation needle by the push rod. This invention uses a pre-assembled plate stacking structure to make the spacing of the radioactive particles adjustable, simplifying on-site operation.

The invention discloses an absorbable particle cannula loaded with double radiosensitizers, and aims to effectively improve the internal radiation radiotherapy effect and facilitate implantation of radioactive particles, and the whole material can be degraded and absorbed in vivo and does not need to be taken out through a secondary operation. The absorbable particle sleeve mainly comprises an absorbable particle sleeve body for packaging radioactive particles, a spacer which is arranged in the sleeve body and is used for spacing the radioactive particles, and a polydopamine coating which is loaded with a double radiosensitizer of metal nanoparticles and aromatic ring structure drugs. In the polydopamine coating, the metal nanoparticles are nanoparticles formed by reducing metal ions on the surface of the coating in situ through catechol groups of polydopamine; and the medicine is loaded on the surface of the coating through non-covalent acting force (pi-pi stacking action, hydrophobic interaction and / or electrostatic attraction).

The invention relates to an implantation device for gold labels or radioactive particles, belongs to the technical field of medical instruments, and solves one of the problems that the number of the gold labels or radioactive particles loaded at one time is insufficient and the implantation counting accuracy of the gold labels or radioactive particles is poor in an existing implantation device. The device comprises a puncture outfit, a loader and an implantation needle, and the puncture outfit is used for puncturing into the body of a patient and puncturing to a tumor area; the loader can load a plurality of gold labels or radioactive particles and can be clamped on the puncture outfit; and the implantation needle is used for implanting the gold label or the radioactive particles loaded in the loader into a tumor area. A plurality of gold labels or radioactive particles can be loaded at a time through the loader, one-time filling and multi-batch continuous implantation are achieved, the device does not need to be frequently disassembled to supplement the gold labels or radioactive particles, the interruption frequency of clinical operation is greatly reduced, the operation efficiency and operation continuity are improved, and the large-dose implantation requirement is met.

The application belongs to the technical field of biological medicine, and particularly relates to an ultrathin radioactive patch for skin cancer treatment and a preparation method thereof. The preparation method comprises the following steps: adding a photoinitiator solution into a methyl methacrylate gelatin solution, and performing water bath heating dissolution under light shielding conditions; after the dissolution is completed, mixing the radioactive particles used for external irradiation treatment, stirring to a semi-solid state, smearing to a patch bottom film by using a smearing part, covering the patch anti-adhesion paper on the surface, irradiating and curing by using a light source, and obtaining the ultrathin radioactive patch. The patch prepared by the application can be customized according to the size and shape of a lesion site, a corresponding bottom film is cut out and attached to the lesion site, and smearing is directly performed. Compared with a common radioactive hydrogel, the preparation method is simpler, the preparation time is shorter, and the efficiency is higher.

This invention belongs to the field of nuclear facility radiation monitoring technology and aims to solve the problem of low accuracy in identifying and measuring multiple radioactive particles in mixed radiation fields. It provides a quantitative measurement method for multiple radioactive particles in mixed fields. By building a high-speed waveform data acquisition system, it achieves high-speed, high-precision acquisition of radioactive particle waveform data and reconstruction of the entire waveform under different testing conditions. It also utilizes a convolutional neural network model to complete adaptive feature extraction and accurate classification of radioactive particles from the full waveform data. Simultaneously, it establishes a waveform database covering four types of radioactive particles (α, β, γ, and n) under multiple testing conditions. By combining the database with waveform feature matching, it ultimately achieves rapid, high-precision identification and accurate quantitative measurement of the four types of radioactive particles in complex environments, significantly improving the technical level and practical application effect of nuclear facility radiation monitoring.

The silicone stent with the radioactive particles for the pneumology department comprises a main stent body and a first baffle, connecting shafts are rotationally arranged in the main stent body, a through hole is formed in the surface of the main stent body, the tail ends of the connecting shafts are located in the through hole, and the connecting shafts are symmetrically distributed relative to the center of the through hole; and the sliding blocks are fixedly mounted on the left side and the right side of the clamping block. According to the silicone support with the radioactive particles for the pneumology department, when the main support is used, the first baffle and the second baffle are in a vertical state, normal use of the main support is facilitated, when the connecting support needs to be in butt joint, a shifting block is pulled to drive the tail end of a positioning rod to move out of a deep groove, and at the moment, a connecting shaft rotates under the action of a torsion spring; and finally, the first baffle and the second baffle are in a horizontal state, at the moment, the connecting support can be in butt joint, the positioning blocks enter the positioning grooves, then the clamping blocks enter the clamping grooves, and the overall use range of the device is widened.

The invention belongs to the technical field of radiochemistry, and particularly relates to a nanofiber filter membrane as well as a preparation method and application thereof. The electrostatic spinning technology is adopted, and the nanofiber filter membrane which is uniform in structure, fine in fiber and free of defects is prepared. By regulating and controlling spinning conditions, optimal fiber diameter distribution is obtained, no spindle exists, and the mechanical property of the filter membrane is improved while the trapping efficiency of the filter membrane on ultrafine particles is improved. The obtained nanofiber filter membrane can keep mechanical stability and low resistance while capturing superfine radioactive particles, the average diameter and the pore diameter of nanofibers are extremely small, the nanofiber filter membrane has a larger comparison area and a porous structure, a large number of contact sites can be provided, and especially the nanofiber filter membrane has excellent capturing efficiency on superfine particles smaller than 100 nm.

A radiotherapy delivery device includes a body having a first end and a second end and a catheter having a lumen extending between a proximal end and a distal end. The proximal end of the catheter is coupled to the second end of the body and the distal end of the catheter includes a cutting tip that penetrates a target site. A sealed pouch containing radioactive particles is positioned within the lumen of the catheter, and a puncture shaft is positioned coaxially within the body. The puncture shaft advances in a longitudinal direction into and through the sealed pouch to release the radioactive particles. A syringe is fluidly coupled to the lumen of the catheter, and the radioactive particles released by the sealed pouch are deposited into the target site when fluid is supplied from the syringe and into the lumen of the catheter.

Disclosed in the present invention are a puncture needle and an automatic particle implantation system using the same. The automatic particle implantation system comprises a controller, an angle adjustment apparatus, and a puncture needle assembly. The angle adjustment apparatus is electrically connected to the controller, the puncture needle assembly is mounted on the angle adjustment apparatus, and the puncture needle assembly comprises a puncture needle. The controller is used for controlling the angle adjustment apparatus to adjust a puncture angle of the puncture needle assembly, and the controller is further used for controlling a particle gun to pass through a septum of the puncture needle to enter the puncture needle to implant radioactive particles, and when the particle gun exits, the septum automatically blocks a wide-diameter section of a needle seat, so as to allow the particle gun to implant radioactive particles again. By means of the precise angle adjustment and the special structural design of the puncture needle, the present invention achieves precise positioning of the puncture needle assembly, thereby significantly improving the efficiency and safety of surgery.

The utility model relates to a kind of gastrointestinal tumor endoscopic radioactive particle implantation device, its structure includes operating part, first striker, second striker, catheter, particle bin, particle loading part and puncture needle;The catheter one end is connected with operating part, and the other end is detachably connected with particle loading part, and the puncture needle is located the end of the particle loading part;First channel and second channel are equipped in the catheter, first striker and second striker pass through operating part respectively, and the first striker is inserted into the first channel, and the second striker is inserted into the second channel, particle bin mounting channel for installing particle bin is equipped in the end of the first channel, and the particle loading part is used to transport the particle exported from particle bin to the position corresponding with puncture needle.The utility model solves the problem of repeatedly loading particles in the prior art, simplifies the operation process, and reduces the operation time.

This utility model relates to the field of medical devices, specifically to a ureteral stent capable of carrying particles, comprising: a tube body and a particle chamber structure; the front and rear ends of the tube body are curved into a pigtail shape; the tube body is a single through-hole serving as a drainage cavity; several drainage holes are provided on the curved portions of the front and rear ends of the tube body; a marker ring is provided on the tube body at the junction of the curved portion and the tube body; several radiopaque rings are provided on the tube body between two marker rings; the particle chamber structure is integrally formed with the tube body, and the particle chamber structure includes several particle chambers distributed laterally along the tube body. Each particle chamber is a cylindrical cavity, with one end of the cylindrical cavity serving as a particle placement channel. The entrance to the particle placement channel is sloped, and the bottom of the slope is a baffle to prevent the radioactive particles from slipping out. The cylindrical cavity is filled with radioactive particles. This utility model combines a ureteral stent with radioactive particles, and uses a single particle chamber with several particle chambers arranged laterally, making it simple to operate and convenient to use.

This utility model relates to the technical field of nuclear power plant safety protection facilities, and in particular to a pressure relief device for nuclear power plants with a filtration structure. The device includes a pressure relief pipe with electrically controlled valves installed at both ends, and multiple filters are installed inside the pipe. By installing two filters inside the pressure relief pipe and filling them with different types of filter materials, this device can rapidly release pressure inside the containment vessel while efficiently removing harmful components such as metallic sodium vapor, hydrogen, and radioactive particles from the emitted gas. This effectively reduces harm to the environment and equipment. Compared to traditional pressure relief systems that rely solely on gas recovery bladders to collect gas, this device directly purifies the gas on-site, significantly improving the overall operational safety and environmental protection level of the nuclear power plant.

1. Name of the designed product: filling machine. 2. Use of the designed product: for automatic filling of particle cartridges with radioactive particles. 3. Design points of the designed product: in shape. 4. Picture or photo best showing the design points: perspective view 1.

This invention relates to the field of medical devices, specifically to a radioactive particle implantation needle for interventional radiology of tumors. The needle includes an implantation needle body with a delivery channel along its length. A material storage slot communicating with the delivery channel is located in the middle of the implantation needle body. The material storage slot contains a supply compartment with a particle placement cavity. A sealing mechanism for sealing the particle placement cavity is located at the bottom of the supply compartment. The supply compartment also contains a compression mechanism for compressing radioactive particles towards the bottom of the particle placement cavity. This invention employs a detachable integrated structure for the implantation needle body and supply compartment, allowing for pre-loading of particles before surgery. This eliminates the need for manual loading of particles into the delivery channel during surgery using external tools, reducing intraoperative steps. The fixing bolts and threaded holes enable quick assembly and disassembly, further shortening preoperative preparation and surgical time, and improving operational convenience.

The invention discloses a multi-channel core pulling mechanism which comprises a core pulling mechanism body and a moving platform, and the moving platform can enable the core pulling mechanism body to be in butt joint with the tail portions of different needle cores one by one by adjusting and controlling the positions and / or the distances between the core pulling mechanism body and the tail portions of the different needle cores. The core pulling mechanism pulls out the needle core after being in butt joint with the corresponding needle core. According to the invention, the needle core can be pulled out before particle implantation, so that a radioactive source implantation machine is prevented from being always rigidly connected with a puncture needle, and then radioactive particle implantation is carried out immediately; the normal operation is ensured on the premise of avoiding scratching a patient; the positions and / or the distances between the core pulling mechanism and the tail parts of the different needle cores are regulated and controlled through the motion platform, so that automatic butt joint of the core pulling mechanism and the tail parts of the different needle cores is realized, the core pulling mechanism can pull out the needle cores after being in butt joint with the tail parts of the different needle cores one by one, and multi-channel core pulling is realized.

The utility model relates to the field of medical instruments, in particular to a nasal esophageal tracheal fistula three-balloon nasal feeding tube composite set loaded with radioactive particles, which comprises a tube body, a lower blocking balloon, a particle balloon, an upper blocking balloon, a tube body butt joint structure and a nasal guide structure. The radion-loaded three-balloon nasal feeding tube composite set for the nasal esophageal and tracheal fistula is a medical instrument which is combined with the nasal feeding tube and can be used for blocking and treating a fistula opening of a patient suffering from the esophageal and esophageal fistula and carrying out precise targeted radiotherapy on a cancerous part of esophageal cancer, and feeding nutrition of the patient is convenient to convey. The device is simple in structure, convenient to operate, high in working and operating efficiency, stable in operation, beneficial to popularization and promotion, capable of effectively relieving pain of patients, convenient to mount and dismount, obvious in acting effect, capable of achieving differentiated treatment, stable in whole and high in pertinence, and has wide market prospects.

The utility model relates to the field of medical instruments, in particular to a cervix uteri treatment support carrying radioactive particles, which comprises a tube body, a balloon, a particle support, a cleaning tube, a cleaning joint, a water injection tube, a water injection joint, a push rod and a lifting rod. According to the cervix uteri treatment support carrying the radioactive particles, the balloon and the bowl-shaped particle support are fixed front and back, so that particle radiation of the tube body and the particle support can conduct accurate treatment on a patient part, and radiation damage to other healthy tissue caused by dislocation, slippage, escape and the like can be avoided. The treatment support can be released once until the treatment course is finished without repeated release, so that the time of doctors is saved, the pain of patients is relieved, and the operation is simple, convenient and practical.

The utility model relates to the technical field of medical treatment, and discloses a detachable radioactive 125I particle strip which comprises an implantation tube, the implantation tube is of a cavity structure with one closed end, particles are packaged in the implantation tube, the other end of the implantation tube is open, and a tube sealing piece used for sealing the open end of the implantation tube is installed at the open end of the implantation tube. A pushing device is detachably and fixedly connected to the end, away from the implanting pipe, of the pipe sealing piece and comprises a connecting piece, the connecting piece is detachably and fixedly connected with the pipe sealing piece, a horizontally-arranged push rod is fixedly connected to the end, away from the pipe sealing piece, of the connecting piece, and the center circumference of the push rod in the length direction is parallel to the central axis of the extending direction of the implanting pipe; and a guide device is also arranged at the front end of the implantation tube. The push rod is arranged on the particle strip, so that medical staff can accurately grasp the position of the particle strip in the process of implanting the particle strip, and the implantation accuracy of the particle strip is improved; the pipe sealing piece is detachably and fixedly connected with the connecting piece, so that the push rod is released.

This utility model relates to a radioactive particle implantation device for tumor treatment, belonging to the field of medical device technology, and solves the technical problem of push-and-jam during the delivery of radioactive particles in the prior art. This utility model includes a puncture needle, a receiving cavity, a particle boat, and a push-and-jam assembly. The particle boat includes a particle sleeve, a stabilizing sleeve, and a push-and-jam cover. The particle sleeve has a receiving space to accommodate the radioactive particles, directly carrying the radiation source and protecting the particles from mechanical damage during delivery. The stabilizing sleeve keeps the particle sleeve and the radioactive particles it carries always in the center of the receiving cavity, avoiding delivery jamming due to skewness. By coordinating the particle sleeve, stabilizing sleeve, and push-and-jam cover, the radioactive particles do not directly contact the inner wall of the receiving cavity, thereby reducing frictional resistance. The particle sleeve is always in the center of the receiving cavity, reducing unilateral friction between the particle sleeve and the inner wall of the receiving cavity, thus reducing the occurrence of push-and-jam during the delivery of radioactive particles.

The double-cavity biliary-intestinal nutrient canal capable of loading the radioactive particles comprises a canal body, a canal cavity of the canal body is divided into a main canal of a hollow structure and a branch canal of a hollow structure through a diaphragm, one side of the main canal is connected with the branch canal, one end of the main canal and one end of the branch canal are each provided with a canal head, and the other end of the main canal and the other end of the branch canal are each provided with a catheter head. The pipe cavity of the main pipe is larger than that of the branch pipe; the tube body is fixedly sleeved with a developing ring, the tail end of the main tube is bent to be in a pigtail ring shape, a plurality of side holes are formed in the inner side of the tail end of the main tube, the tip end of the branch tube is a blind end, and a graduated scale is marked on the surface of one side of the branch tube. When the double-cavity biliary-intestinal nutrient canal is applied, radioactive particles can be implanted and stored through the branch tube, local radiotherapy of bile duct cancer is achieved, infusion of nutrition in the jejunum can be achieved through the main tube and the side holes in the pigtail ring, the operation process is simple, and infection and tube disengaging can be avoided.

The invention discloses a full-automatic cartridge holder filling device for iodine radioactive particles, and belongs to the technical field of particle filling, the full-automatic cartridge holder filling device for iodine radioactive particles comprises a bottom plate, and a first supporting seat and a second supporting seat which are located on the bottom plate, and the first supporting seat and the second supporting seat are provided with a full-automatic iodine ion filling mechanism. The full-automatic iodide ion filling mechanism comprises a driving assembly and a filling assembly, the filling assembly is controlled by the driving assembly to achieve annular arrangement of iodide ions and taking and placing of a cartridge holder, the filling assembly is provided with a transposition assembly, the filling assembly is provided with a cartridge holder assembly, and the full-automatic iodide ion filling mechanism is used for rapid filling and implantation operation. By designing the driving assembly, the filling assembly, the transposition assembly and the cartridge holder assembly, when the full-automatic cartridge holder filling device operates, iodine radioactive particles can be rapidly filled into an annular cartridge holder, multiple radioactive particles can be arranged side by side, meanwhile, direct contact of medical staff is reduced, and potential safety hazards are reduced.

The application belongs to the technical field of medical devices, and provides a nasal cavity decontamination device for otolaryngology, which comprises a liquid distribution assembly, a nasal washing tube, a liquid spraying channel, a cleaning brush and a driving mechanism. The hair is washed before formal decontamination of the nasal cavity, so that radioactive fallout, radioactive or chemical toxic dust, etc. entering the nasal cavity can be thoroughly and finely washed and removed from the hair, reducing the risk of internal radiation and reducing chemical toxic residue. At the same time, when the nasal cavity is formally decontaminated later, the hair can effectively prevent radioactive particles, radioactive dust, chemical toxic particles, etc. from blocking the posterior naris when the nasal cavity is directly decontaminated, avoiding affecting the entry of the cleaning waste liquid into the other nasal cavity and the discharge, thereby improving the decontamination efficiency, and avoiding discomfort for the user during decontamination, avoiding secondary pollution, aspiration and even suffocation.

The utility model discloses a flexible needle withdrawing mechanical arm, a needle withdrawing 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 withdrawal device, the needle withdrawal operation efficiency and the needle withdrawal operation effect in the radioactive particle implantation operation can be guaranteed, and radiation injury to doctors is reduced.

A biliary tract stent particle loading device relates to the technical field of auxiliary equipment for biliary tract stents and is characterized in that a moving mechanism is mounted in a sliding groove, clamping mechanisms are mounted on frame walls on two sides of the moving mechanism respectively, a filling mechanism is mounted on a main frame, a pressing end of the filling mechanism corresponds to a clamping end of each clamping mechanism, and a clamping end of the filling mechanism corresponds to a clamping end of each clamping mechanism. A power switch group is mounted on the main body frame, and the input end of the power switch group is connected with the output end of an external power supply; according to the biliary tract stent particle loading device, the biliary tract drainage tube needing to be provided with radioactive particles is clamped through the clamping mechanism, the notch, where the radioactive particles are installed, of the biliary tract drainage tube is adjusted, clamping does not need to be conducted again, operation is convenient for medical staff, and the working efficiency is improved. The clamping mechanism provided with the biliary tract drainage tube is driven by the moving mechanism to move, and radioactive particles are mounted in the biliary tract drainage tube through the filling mechanism, so that a worker can operate conveniently.

The application provides a Monte Carlo dose calculation method and device based on kernel density estimation, equipment and medium, and relates to the technical field of dose calculation; the method comprises the following steps: establishing a corresponding transport model according to three-dimensional image data; establishing a virtual model according to the transport model, the virtual model comprising a plurality of second grids; determining the medium density ratio between each first grid and the corresponding second grid; determining the corresponding deposited energy of each first grid after the corresponding medium has a collision reaction according to the medium density ratio and the kernel density function; determining the target dose value of the radioactive particle according to each deposited energy and the mass of the corresponding medium of each first grid in each first grid; the kernel density estimation is combined with the virtual collision, so that a single collision of particles can contribute to the whole space dose distribution, the number of simulated particles is effectively reduced, the Monte Carlo dose calculation efficiency is improved, and the application of the Monte Carlo dose calculation method in the field of radiotherapy and the like is further promoted.

The utility model relates to the technical field of medical instruments, in particular to a titanium clip capable of carrying radioactive particles. The titanium clamp capable of carrying the radioactive particles comprises a clamping section, a clamping section, the radioactive particles and a locking assembly, the clamping section is composed of a first bending part, a connecting edge and a second bending part, the two ends of the clamping section symmetrically extend to form a first clamping arm and a second clamping arm, and the first clamping arm and the second clamping arm are the same in length. Placing grooves are formed in the inner side of the first clamping arm and the inner side of the second clamping arm, a plurality of radioactive particles are clamped in the placing grooves, short-distance irradiation treatment on tumors can be achieved, the locking assembly further plays a clamping role, the stability of the titanium clamp is improved, and the titanium clamp is prevented from moving or falling off; according to the titanium clip provided by the utility model, the radioactive particles are combined with the titanium clip, so that accurate treatment of tumor cells is realized, side effects are reduced, and a new solution is brought to the field of tumor treatment. Operating forceps use the titanium clip provided by the utility model, continuous quick ligation can be realized, the infection risk is reduced, and the operation efficiency is improved.