117 results about "Radioactive particles" patented technology

The invention discloses an automatic radioactive particle filling device and method. The device comprises a support assembly, a magazine assembly with a containing cavity, a particle conveying assembly and a particle discharging assembly, and the particle conveying assembly comprises a vibration mechanism, a funnel, a channel plate and a pushing assembly; a first channel extending in the vertical direction is formed in the bottom of the funnel, a second channel extending in the vertical direction and a third channel extending in the left-right direction are formed in the channel plate, the second channel communicates with the first channel, the particle conveying assembly further comprises a rotating part rotationally arranged in the channel plate, and a fourth channel is formed in the rotating part; the rotating piece is provided with a first position and a second position, and the fourth channel is communicated with the second channel at the first position; at the second position, the fourth channel is communicated with the third channel, and the pushing assembly can push the radioactive particles out of the channel plate. The device can realize automatic filling of radioactive particles, is high in production efficiency, and can reduce the labor intensity of operators and the risk of radiation.

The invention discloses an intelligent medical management method and system based on malignant tumor radiotherapy. The method comprises the following steps: acquiring holographic image data corresponding to clinical image data of a patient; inputting the holographic image data into a trained deep learning model to identify a malignant tumor target region and attributes thereof; calculating the dose of radioactive particles based on the malignant tumor target region and the attributes thereof; generating a 3D printing instruction according to the malignant tumor target region; obtaining dose distribution monitoring data of radioactive particles in the treatment area; analyzing the uniformity of radioactive particles according to the dose distribution monitoring data; and according to the malignant tumor target region, the attributes and the uniformity of the radioactive particles, generating a treatment scheme and performing treatment risk assessment. Effective connection of all links can be achieved, the treatment time of a patient is shortened, and the treatment effect is improved.

The invention discloses a robot particle implantation actuator capable of rapidly replacing needles, and belongs to the field of medical robots. The problems that an existing particle implantation actuator is inconvenient in needle replacement and mostly does not have a puncture function, and the operation efficiency is affected are solved. The device comprises a shell, an outer needle assembly, an inner needle assembly, a quick release flange, a sensor assembly, a magnetic positioning block and an inner and outer needle assembly transmission mechanism, the top of the inner and outer needle assembly transmission mechanism is provided with a quick-release flange used for being in butt joint with a mechanical arm. The inner and outer needle assembly transmission mechanism is used for the movement of the outer needle assembly and the inner needle assembly, puncturing a cannula outer needle embedded with a puncture inner needle into a human body, replacing an implantation inner needle, sending the implantation inner needle in the inner needle assembly into the particle bin, pushing radioactive particles in the particle bin to the cannula outer needle, and pushing the radioactive particles out of the cannula outer needle; the inner-outer needle assembly is arranged at the lower end of the machine shell and fixedly connected to the bottom of the inner-outer needle assembly transmission mechanism through a magnetic positioning block. The device is mainly used for percutaneous puncture and implantation of radioactive particles.

The utility model belongs to the field of medical instruments, and particularly relates to an integrated radioactive particle protection implanter, which comprises a particle bin for storing a particle short rod, a particle bin seat with a handle, a push needle and a puncture needle, the particle bin seat is connected with the puncture needle through a connecting end, and the particle bin seat comprises an upper bin seat and a lower bin seat. A containing cavity used for containing the particle bin is formed between the upper bin base and the lower bin base, the upper bin base is connected with the handle, the handle, the upper bin base, the particle bin and the lower bin base are sequentially and coaxially provided with material pushing holes allowing the pushing needle to penetrate through, and the discharging ends of the material pushing holes are located on the lower bin base and connected with the connecting end. And the particle bin and the particle bin seat are integrated, so that medical staff are prevented from being affected by radiation in the installation process, and the situation that disputes are generated between hospitals and supply manufacturers due to the fact that the particle short rods are lost is reduced.

The invention discloses a method for removing metal impurities through electrolytic coupling vacuum distillation of tin benzene sulfonate. The method comprises the following steps: step 1, preparing a liquid; step 2, preparing an electrolyte; step 3, electrolysis; 4, copper removal and refining; and step 5, vacuum distillation. According to the method, the crude tin is prepared into the electrolyte, the benzene sulfonate is added for electrolysis, the precipitation potential of lead and tin is changed, the impurity lead element with high difficulty is removed, other impurity elements in the crude tin can also be removed, the lead, copper and other impurity elements are further removed by combining copper removal refining and vacuum distillation, and the 5N or 6N standard high-purity tin is obtained. The content of the lead element and the content of the bismuth element are both smaller than 1 ppm, the content of the uranium element and the content of the thorium element are both smaller than 1 ppb, the requirement of a low-alpha-ray-dose material is met, the problem that radioactive alpha-particle impurity elements in crude tin are difficult to remove through an electrolytic method is effectively solved, the use requirement that the high-purity tin serves as a welding flux is met, and the quality of a semiconductor chip is greatly improved.

The embodiment of the invention provides a radioactive aerosol continuous monitoring device. The radioactive aerosol continuous monitoring device comprises a sampling chamber (1), sampling filter paper (3) and a measuring chamber (2), the sampling chamber (1) is arranged in front of the measuring chamber (2) in the horizontal direction; the sampling chamber (1) comprises a vertically arranged air sampling inlet pipe (13) and a centripetal particle size separation sampler (11) which is arranged below the air sampling inlet pipe (13) and is used for separating radioactive aerosol according to different particle sizes; and the sampling filter paper (3) is arranged below the centripetal particle size separation sampler (11) and is used for receiving the radioactive aerosol separated by the centripetal particle size separation sampler (11). The radioactive aerosol is separated through the centripetal particle size separation sampler, the problem of particle slippage does not exist, the collection efficiency of radioactive particles can be effectively improved, the detection sensitivity and accuracy of the radioactive aerosol are improved, and continuous monitoring of the radioactive aerosol in the air is achieved.

The utility model discloses a multifunctional biliary tract internal and external drainage tube combination device applied to a patient suffering from hilum cholangiocarcinoma. A drainage catheter is transited from a shaping area and an elastic cabin area to an internal drainage area to form a cylindrical cone; side holes are formed in the inner drainage area and the shaping area; a marker point is arranged between the inner drainage area and the missile cabin area, the missile cabin area is distributed between the inner drainage area and the shaping area, a one-way valve is arranged at the contact position between the shaping area and the missile cabin area, a hole channel is formed in the outer wall, extending into the marker point from the missile cabin area along the one-way valve, of the missile cabin area, and the hole channel forms a missile cabin in the missile cabin area. The magazine is used for placing radioactive particles; the hard support is used in cooperation with the drainage catheter, the hard support penetrates into the outer drainage area and then is pulled to the end of the inner drainage area, and the curled part of the shaping area of the hard support is straightened. The utility model can realize internal and external drainage and achieve the purpose of local tumor treatment, and is simple and convenient to operate and easy for medical staff to use.

The utility model discloses an in-vivo indwelling tube for containing radioactive particles and in-vivo indwelling equipment, and relates to the technical field of medical instruments. According to the in-vivo indwelling tube used for containing the radioactive particles, the in-vivo indwelling tube can contain the radioactive particles through the inner cavity, and at least one end of the in-vivo indwelling tube can be closed. The radioactive particles contained in the in-vivo indwelling tube cannot move to the outer side of the in-vivo indwelling tube through at least one end in the closed state. Therefore, the in-vivo indwelling tube can accommodate the radioactive particles, and the radioactive particles can be fixed in the inner cavity of the in-vivo indwelling tube.

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 utility model discloses a hidden particle film-covered esophageal stent which comprises a cylindrical stent body, radioactive particles and a film-covered sleeve matched with the stent body. One or more particle mounting channels are arranged on the peripheral side of the support body in the circumferential direction, and each particle mounting channel extends in the axial direction and is inwards concaved in the outer surface of the support body; one or more particle mounting positions are arranged in each particle mounting channel, the particle mounting positions are used for adding radioactive particles, and after the radioactive particles are mounted in the particle mounting positions, the radioactive particles do not protrude out of the outer surface of the support body; after the radioactive particles are installed on the stent body, the covered sleeve is sleeved on the periphery of the stent body. According to the esophageal stent implantation device, the esophageal wall or a tumor can be prevented from being pressed and directly injured when the esophageal stent is implanted, the esophageal stent can be taken out, and the esophageal mucosa cannot be damaged when the esophageal stent is taken out.

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 a handheld radioactive particle implantation device which comprises an implantation device body, a push needle assembly, a puncture needle assembly, a particle cartridge holder and a connecting assembly, the puncture needle assembly and the particle cartridge holder are detachably installed on the connecting assembly, and the connecting assembly and the push needle assembly are installed on the implantation device body; the push needle assembly comprises a push needle and a push needle mounting seat, and the push needle of the push needle assembly is coaxial with the puncture needle and moves back and forth in the axis direction of the puncture needle; a driving assembly is arranged between the needle pushing assembly and the implanting device main body and drives the needle pushing assembly to linearly move back and forth; a grab handle and an operation button are arranged below the implanting device main body, and the operation button is in control connection with the driving assembly. The method has the beneficial effects that the requirement for the operation proficiency of medical staff is lowered, and finger fatigue and psychological burden of the medical staff are relieved; the risk of clamping stagnation when the push needle is pushed and pulled is reduced, the pain of a patient is reduced to a certain extent, and the operation efficiency is improved.

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 embodiment of the invention is suitable for the technical field of nuclear power, and provides a ventilation system and a control method of the ventilation system, and the ventilation system and the control method are applied to an emergency resident area of a nuclear power plant. Different purification units are mounted in different areas of the emergency residence area; the purification units with different function types are used for filtering different radioactive substances; the radioactive substances comprise radioactive particles, radioactive aerosol and radioactive gas; each purification unit comprises an air inlet module, a purification module and an air exhaust module; the air inlet module is connected with the purification module and used for introducing air in the emergency residence area into the purification module; and the purification module is connected with the exhaust module and is used for filtering radioactive substances corresponding to the function type of the purification unit and exhausting the filtered air into the emergency resident area through the exhaust module. According to the ventilation system provided by the embodiment of the invention, the safety of the emergency resident area can be improved.

The present invention discloses a particle implantation device with double implantation bins, which belongs to the field of medical device technology. The sliding bin seat is slidably installed in the outer shell, and bin-changing push rods are respectively provided on both sides of the sliding bin seat, and through holes are correspondingly provided on both sides of the outer shell, and the bin-changing push rods pass through the through holes; the sliding bin seat is provided with a first bin position and a second bin position, the first bin position is connected to the radioactive particle implantation bin, and the second bin position is connected to the supporting particle implantation bin; the upper joint assembly is connected to the upper plane of the outer shell, and the lower joint assembly is connected to the lower plane of the outer shell, and the lower joint assembly is used to connect with the implantation needle; the upper plane and the lower plane of the outer shell are respectively provided with an upper through hole and a lower through hole; when the sliding bin seat slides to different gears respectively, the upper joint assembly, the upper through hole, the lower through hole and the lower joint assembly can respectively form a through channel with the first bin position or the second bin position. The present invention can conveniently and quickly place radioactive particles and supporting particles alternately into the implantation needle, and accurately control the distance between two adjacent radioactive particles.

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 present application relates to the technical field of tumor radiotherapy and magnetic induction hyperthermia medical devices, and discloses a composite particle magnetic hyperthermia-radiotherapy system implanted via a soft ultrasonic endoscope, comprising a soft ultrasonic endoscope, a puncture needle sliding in a working channel of the soft ultrasonic endoscope, one end of the puncture needle being connected to a particle channel, the particle channel being loaded with composite particles; a propulsion needle pushing the composite particles in the particle channel to the puncture needle; the present application can sequentially implant composite particles, so that it can have magnetic hyperthermia and radiotherapy effects, synergistically enhance sensitivity, and can more efficiently kill diseased tissues and improve treatment effects; and the system is guided by a soft ultrasonic endoscope and intervenes through natural cavities to puncture and implant composite particles in malignant tumors in human cavities such as the digestive tract, thereby broadening the application scenarios of magnetic hyperthermia and radioactive particle therapy; due to the self-temperature-control characteristics of the composite particles, the system does not require a temperature measurement and control device, thereby reducing the complexity of the equipment while ensuring the targeting, safety and efficacy of tumor treatment.

The invention discloses an automatic filling device for radioactive particles, and the device comprises a particle sorting mechanism which is used for sorting the radioactive particles; the cartridge holder mounting mechanism is used for mounting a cartridge holder so as to fill the radioactive particles sequenced by the particle sequencing mechanism; the particle conveying mechanism is used for receiving the radioactive particles sorted by the particle sorting mechanism and conveying the radioactive particles to a filling position of the cartridge holder mounting mechanism; the particle pushing mechanism is used for pushing the radioactive particles conveyed by the particle conveying mechanism into the cartridge holder; the cartridge holder control mechanism is used for enabling the cartridge holder to make a particle filling position so as to receive the radioactive particles pushed by the particle pushing mechanism; the particle blocking mechanism is mounted on the cartridge holder mounting mechanism and is used for opening or closing a discharge hole of the particle sorting mechanism; the particle sorting mechanism, the particle conveying mechanism, the particle pushing mechanism and the cartridge holder control mechanism are in signal connection with the control unit. According to the automatic filling device provided by the invention, the particle filling efficiency and safety can be improved.

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.

The invention discloses a radioactive particle interventional operation device which comprises a positioning needle, a flexible needle, a propelling needle, a fixing assembly, a propelling assembly, a rotating assembly, a feeding assembly and a pushing assembly. The propelling assembly is located on the lower end face of a propelling base, and the pushing assembly is located on the upper end face of the propelling base; the rotating assembly is located on the upper end face of the propelling base and located on the left side of the pushing assembly, the feeding assembly is located on the upper end face of the propelling base and located on the right side of the pushing assembly, and the propelling assembly, the pushing assembly, the rotating assembly and the feeding assembly are all arranged in the front-back direction. The propelling assembly and the fixing assembly can be staggered in the vertical direction, parts such as a cable connected to the fixing assembly cannot interfere with the propelling assembly, installation of the device and the mechanical arm of the surgical robot is better facilitated, meanwhile, limitation of the propelling assembly to the action range of the mechanical arm in the action process of the mechanical arm is reduced, and the mechanical arm is more convenient to use. And the mechanical arm can have a larger movement range.

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 discloses a clinical prediction model construction method and system for treating oligometastatic non-small cell lung cancer through radioactive particle implantation, and relates to the technical field of medical model construction, and the method comprises the steps: obtaining patient data, taking survival time as a main endpoint event, employing a Cox regression model to carry out single-factor analysis on factors affecting patient prognosis, and obtaining a single-factor analysis result; determining the relationship between each clinical feature and survival time, and incorporating the important factors influencing the prognosis into multi-factor Cox regression analysis to determine independent risk factors influencing the survival prognosis of the patient; generating a first clinical prediction model according to each independent risk factor nano-construction; cD3 + AC, CD4 + AC, CD8 + AC, combined treatment, complete treatment and the number of metastatic lesions are taken as variables together to be included in construction of a clinical prediction model, and a second clinical prediction model is manufactured and generated. Independent risk factors influencing the prognosis of a radioactive particle implantation treatment few-metastatic NSCLC patient are confirmed, the clinical prediction model is established, the treatment prognosis can be accurately predicted, and the treatment cost is reduced. And screening of dominant benefit people is facilitated.

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.

Disclosed are a simulation method and device for radioactive particle source distribution in a lumen. The method comprises: marking a target area and a lumen target in an image space, and establishing a three-dimensional model containing the target area and the lumen target in a three-dimensional space; selecting the length and diameter of a stent on the basis of a luminal centerline of a narrowed section of the lumen target caused by the treatment target area, and establishing a stent model in the three-dimensional space; simulating implantation of the stent into the lumen, expanding the target area and the lumen, acquiring a stent-lumen-target area model, and extracting simulation results of the stent-lumen-target area model after stabilization of the stent-lumen-target area model; calculating a relationship matrix between the image space and the three-dimensional space, and inversely mapping the simulation results of the stent-lumen-target area to the image to obtain a simulated postoperative CT; rasterizing an expanded surface of the stent to obtain candidate particle coordinates; and establishing an objective function on the basis of the postoperative target area and the candidate particle coordinates, and performing plan optimization for dose and number of particles using a heuristic method.

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 present invention relates to a device and method for detecting and sorting the appearance quality of radioactive particles. The device includes a vibration system for supplying radioactive particles, an induction system for judging the information of radioactive particles in the vibration system, an escapement system provided with a lifting system, a detection system for detecting the appearance quality of radioactive particles, a first discharge table for collecting qualified products, and a second discharge table for collecting unqualified products. The device further includes a control system installed in an operation box. Under the control of the control system, the escapement system, in cooperation with the lifting system, sequentially completes the operations of sucking radioactive particles from the vibration system, transferring the sucked radioactive particles to the detection system to detect whether the appearance quality is qualified, and releasing the detected radioactive particles into corresponding collection bottles according to whether they are qualified or unqualified. This device can automatically complete the detection and sorting of the appearance quality of radioactive particles, has high production efficiency, and does not damage radioactive particles.