237results about How to "Avoid radiation damage" patented technology

Stabilized radiopharmaceutical formulations are disclosed. Methods of making and using stabilized radiopharmaceutical formulations are also disclosed. The invention relates to stabilizers that improve the radiostability of radiotherapeutic and radiodiagnostic compounds, and formulations containing them. In particular, it relates to stabilizers useful in the preparation and stabilization of targeted radiodiagnostic and radiotherapeutic compounds, and, in a preferred embodiment, to the preparation and stabilization of radiodiagnostic and radiotherapeutic compounds that are targeted to the Gastrin Releasing Peptide Receptor (GRP-Receptor).

The invention provides a small-diameter pipe inside weld surface defect identification device. The device comprises a computer, an industrial camera, an adapter, an industrial endoscope, a mobile portable light source, an endoscope fixing clamp and a pipe fitting to be detected. The industrial camera is connected with the computer. One end of the adapter is connected with the industrial camera, the other end is connected with the industrial endoscope, and the adapter can be used for acquiring weld images. The mobile portable light source is connected with the industrial endoscope and used for providing lighting inside the pipe. The endoscope fixing clamp is connected with the endoscope and used for center positioning, upward and downward adjustment and positioning and 360 degrees of rotation of the endoscope. Identification detection of the weld surface defects inside the pipe fitting to be detected is completed.

The invention discloses a proton therapy system based on a compact superconducting cyclotron. The proton therapy system includes a superconducting cyclotron system, an energy selection system and a beam transportation system, a fixed treatment room subsystem and a rotary frame treatment subsystem; the fixed energy proton beam led out by the superconducting cyclotron in the superconducting cyclotron system can be a continuously adjusting proton beam of 70-200MeV via the energy selection system, so that the longitudinal adjustment of the range during the proton therapy of tumors can be met; thebeam is transmitted to the fixed treatment room subsystem and the rotary frame treatment subsystem via the beam transportation system; the superconducting cyclotron system, the energy selection system, the beam transportation system and a treatment head are subjected to cooperative control to realize the transverse expansion of the proton beam, so that the intensity modulation treatment of the tumor can be completed. According to the invention, the innovation is good, the practicability is high, the beam intensity of the superconducting cyclotron is adjustable, and the intensity modulation treatment can be realized; and the system has an extremely important promotion effect on the accuracy, effectiveness and high efficiency of tumor treatment of a patient.

A method for removing a particle from a substrate includes forming a layer of a fluid on a surface of an optical element and positioning the optical element in proximity to a location of the particle on the substrate. A pulse of electromagnetic radiation is directed to impinge on the surface of the optical element so as to induce explosive evaporation of the fluid thereon, whereby a pressure wave is emitted toward the location of the particle.

The invention provides a sterilization and deodorization device for a refrigerator and the refrigerator. The sterilization and deodorization device comprises a housing, a sterilization module and a deodorization filtration module filled with sepiolite, wherein an air inlet and an air outlet are formed in the housing, an airflow channel communicated with the air inlet and the air outlet are defined in the housing, the sterilization module is arranged in the airflow channel and used for sterilizing air flowing through the airflow channel at least, and the deodorization filtration module is arranged in the downstream airflow channel of the sterilization module and used for deodorizing the air flowing through the airflow channel at least. The sterilization and deodorization device conducts sterilization and deodorization on the air flowing through the airflow channel through the sterilization module arranged in the airflow channel and the deodorization filtration module filled with sepiolite and arranged in the airflow channel and accordingly conducts sterilization and deodorization on the air in the outside environment of the sterilization and deodorization device indirectly.

The invention discloses milk protein blending regenerating cellulose fiber, and a preparation process and application thereof. The process comprises the following steps of: (1) pulping; (2) dipping; (3) squeezing and crushing; (4) ageing; (5) yellowing; (6) dissolving; (7) ripening; (8) preparing milk protein spinning solution; (9) spinning; and (10) performing aftertreatment to obtain a finished product. The milk protein blending regenerating cellulose fiber can be used for preparing viscose short fiber and viscose filament yarn and has the characteristics of skin affinity, skin-nourishing property, moisture absorption, air permeability, soft handfeel, gloss, brightness, luxury appearance, excellent physical and mechanical properties and the like.

The invention discloses a CT (computed tomography) positioning system implemented by using visible light and infrared light and a CT positioning method. The CT positioning system comprises multiple visible light and infrared cameras and a computer system, the computer system comprises a three-dimensional reconstruction module, a human model database, a matching and positioning output module and an attribute input module; the three-dimensional reconstruction model reconstructs outer human contour models according to image information acquired by the visible light and infrared cameras; the human model databases stores multiple default three-dimensional human models; the attribute input module inputs attribute information of the outer human contour models; the matching and positioning output determines the three-dimensional human models matched with the attribute information from the human model database according to the attribute information, matches the outer human contour models with the three-dimensional human models matched with the attribute information and positions positional information of specific parts of human body. With the system and method, X-ray scanning is not needed, and damage caused to the human body by X-ray can be reduced.

The invention discloses a near-distance image navigation full-automatic radioactive particle implanting device which comprises a puncture needle puncture module, a radioactive particle implanting module and a puncture needle rotating module. The puncture needle rotating module comprises a puncture needle, a puncture needle clamping head and a puncture needle rotating wheel which are coaxially arranged, a puncture needle rotating wire is wound on the puncture needle rotating wheel, the radioactive particle implanting module comprises a fixing barrel which supports the puncture needle rotating wheel and is in rotatable connection with the same, a radioactive particle clip is fixed on one side of the fixing barrel and communicated with the puncture needle, the front portion of a flexible probe wound on a probe driving wheel body is mounted in the puncture needle in an inserted manner, a probe driving wire is wound on a probe driving wheel, the puncture needle puncture module comprises a slider fixedly connected with the fixing sleeve, and the slider is connected with a spiral transmission module which is driven by a screw rotating wire. The near-distance image navigation full-automatic radioactive particle implanting device is high in radioactive particle implanting accuracy and high in speed, and damage to doctors by radioactive operating environment can be lowered.

The invention relates to a catheter intervention device with the conveying resistance feedback function, belonging to a catheter intervention device, and aiming at solving the problems that the existing catheter intervention device is not compact in structure, does not have the conveying resistance feedback function and is operated at the surgical site by doctors getting involved the surgery. Output shafts of a left and a right motors are fixedly sheathed with a left side driving gear and a first-stage driving gear; the left side driving gear is meshed with a left side driven gear; the first-stage driving gear is meshed with a first-stage driven gear; a second-stage driving bevel gear is fixedly connected with the first-stage driven gear; the second-stage driving bevel gear is meshed with a second-stage driven bevel gear; a third-stage driving gear is fixedly connected with the second-stage driven bevel gear; the third-stage driving gear is meshed with a third-stage driven gear; a driving friction inner wheel is fixedly provided with a touch force sensor; the driving friction inner wheel is connected with a driving friction outer wheel by the touch force sensor; a signal output end of the touch force sensor is connected with a signal input end of an amplification circuit board; and an amplifying signal output end of the amplification circuit board is connected with a signal input end of an inner ring of a second electric conduction sliding ring. The catheter intervention device is used for continuously conveying a catheter and feedback of the force.

A thermion-photoelectric-thermoelectricity combined type isotope cell comprises a radioactive source and an energy transition structure; two ends of the energy transition structure are respectively assembled with a cell anode and a cell cathode; the energy transition structure comprises an emission pole plate, a filling medium and a transparent charge collection plate arranged in sequence from inside-out and compactly stacked; the emission pole plate is arranged on the radioactive source side surface; the energy transition structure also comprises a first transparent insulation substrate, a photoelectric assembly, a second transparent insulation substrate and a thermoelectricity assembly arranged in sequence from inside-out and compactly stacked, wherein the first transparent insulation substrate is arranged on the transparent charge collection plate side surface; two ends of the photoelectric assembly are provided with a first electricity output electrode; two ends of the thermoelectricity assembly are provided with a second electricity output electrode; the energy transition structure side surface and cell anode and cathode on two ends are wrapped by a buffer pad; an inner package and an outer package heat radiation layers are arranged on the outer surface of the buffer pad. The thermion-photoelectric-thermoelectricity combined type isotope cell is high in energy conversion efficiency, large in output power, strong in environment applicability, good in work stability, and long in service life.

The invention relates to a non-radiation perspective visual navigation method and a non-radiation perspective visual navigation system for assisting the orthopedic surgery. According to the system, the integral three-dimensional shape of a surgical site is acquired by utilizing conventional three-dimensional scanning data before the surgery, and the operation path of a surgical instrument is planned in advance; during the surgery process, a three-dimensional reconstruction device on the surgical instrument reconstructs the local three-dimensional shape of the exposed surgical site in real time, the local three-dimensional shape is matched with the integral three-dimensional shape, and thus the position relation between the surgical instrument and the operation path is determined; the surgical instrument is guided to carry out surgical operation along the pre-planned operation path according to the position relation. The invention provides the navigation method and the navigation system for the orthopedic surgery, which are simple and accurate, and are free of radiation injuries; with the navigation method and the navigation system, the accuracy of internal fixation placement of the orthopedic department can be obviously improved, the navigation process is simplified, the navigation matching time is shortened, the cost of navigation equipment is reduced, the radiation injuries during the surgery are avoided, and thus the accuracy and success rate of the internal fixation technology of the orthopedic department are comprehensively improved.

The invention provides an embolism material composition as well as preparation method and use thereof, and the embolism material is prepared from reactant raw materials through polymerization, wherein the reactant raw materials comprise a magnetic resonance imaging substance, and a monomer containing unsaturated double bonds and anion groups; in the polymer produced through the polymerization of the reactant raw materials, the magnetic resonance imaging substance is combined to the anion group of the produced polymer or dispersed in the polymer. According to the embolism material provided by the invention, a doctor is capable of monitoring and positioning the embolism material through the MRI in and after the embolization, thereby improving the curative effect and security of the embolization therapeutic.

The invention relates to the field of grape wine, in particular to grape wine added with procyanidin B2 and a preparation method. The invention is characterized in that the addition quantity of a grape pip extract in the wine is 0.01-20mg / mL, the content of the procyanidin B2 in the extract is 20-98%, the addition quantity of the procyanidin B2 in the wine is ensured to reach 0.002-19.6mg / mL, the addition quantity of sucrose in the wine is 20-200mg / mL, and the addition quantity of zymosan in the wine is 0.2-0.3mg / mL. After the husks of grape raw materials are broken, the peduncles of the grape raw materials are removed and the grape raw materials are pulped, the grape pip extract, the sucrose and the zymosan are added into the grape pulp according to the above addition quantity, and the grape wine is prepared by fermentation, deposit, filtration, filling and aging. The invention enhances the content of the procyanidin B2 in the grape wine, reinforces the health-care function of the grape wine, improves the production technique procedures simultaneously and improves a product in various aspects of the appearance, the colour, the fragrance, the mouth feel, the aftertaste and the like.

The invention discloses an LED ultraviolet sterilizing lamp, which comprises a connecting base, a lamp body fixedly arranged on the connecting base and a light emitting source in the lamp body, wherein the light emitting source comprises a UVC semiconductor driver board, a UVC semiconductor, a reflector, an LED driver circuit board, an LED lamp bead, a light-transmitting window and a lens; the UVC semiconductor driver board is inlaid with and connected to the connecting base; a radiating substrate is arranged on the connecting base; the wavelength of ultraviolet emitted by the UVC semiconductor is 250-270nm; the reflector is represented as a hollow round platform with upside bigger than downside and is arranged around the UVC semiconductor; lower bottom corners on two sides of the reflector form included angles of 30 degrees with the horizontal surface; ultraviolet is reflected by the reflector and is emitted by an emission angle of 120 degrees; and light of the LED lamp bead radiates the reflector, and is reflected on the lens and intensively emitted from a transparent shade. The sterilizing lamp disclosed by the invention is simple and reasonable in structural setting, relatively low in manufacturing cost, high in ultraviolet emission efficiency and long in service life of LED lamp; and the sterilizing lamp can realize controllable sterilizing angle and improve sterilizing effect.

The invention relates to the field of drying devices, in particular to sand core drying equipment. The sand core drying equipment comprises a roller way conveying device, a control electric cabinet and a drying furnace main body, wherein the roller way conveying device includes an external high-load roller way, a tray, a travel switch a, a travel switch b, a power roller, an aluminum stop edge, a chain wheel and a speed reducing motor; and the drying furnace main body includes such components as a moisture discharge fan, a temperature sensor, a ventilation pipe, a rectangular wave guider, a magnetic control pipe module and a sealing door. The sand core drying equipment applies a microwave heating technology, can shorten the heating time and improve the efficiency, realizes continuous and quick drying of sand cores and paint and mechanization and automation of core making parts, adopts a metal plate labyrinth structure, adds silicon rubber bars capable of absorbing microwaves in structural gaps, reduces the microwave leakage to the greatest extent, and prevents the radiation injury of the microwave leakage to human bodies.

A method for non-contact measuring of the tumor position in chest and abdomen in order to conduct radiotherapy includes laying a patient on the bed, CT scanning to obtain the thoracico-abdominal profile, inputting it to memory module and using it as reference, laying the patient on the therapeutic bed before radiotherapy, taking its thoracico-abdominal image, inputting it to image acquiring module, extracting the thoracico-abdominal profile, comparing it with said reference, and radiotherapy if a match is found.

The invention provides polyvinyl alcohol magnetic particles as well as a preparation method and an application of the polyvinyl alcohol magnetic particles. The polyvinyl alcohol magnetic particles are prepared by reaction among the polyvinyl alcohol magnetic particles, magnetic metal ions and alkaline matter. According to the polyvinyl alcohol magnetic particles, reaction between magnetic materials and hydrogen ions in an acid catalyst can be avoided in the preparation process, thus improving the mangnetic responsiveness and the dispersibility of the polyvinyl alcohol magnetic particles.

The invention discloses an efficient isotope battery based on a gas radioactive source. The isotope battery comprises a battery base with an embedment groove, a radioactive light source support put in the embedment groove of the battery base, at least one radioactive source radiation light-emitting unit put on the radioactive light source support, a lens buckled on the embedment groove of the battery base and isolating the inside and the outside of the embedment groove, an output end support connected with the battery base, and a photovoltaic conversion unit put on the output end support, matched with the lens in position and used for outputting electric energy, wherein light rays emitted by all the radioactive source radiation light-emitting units are projected to the photovoltaic conversion unit after being gathered by the lens. A gas isotope radioactive source is ingeniously used for stimulating a radioactive light-emitting material to emit light, light rays are gathered on the photovoltaic conversion unit by the lens through the combination of an optics principle so that electric energy can be output, the light intensity on the photovoltaic conversion unit is greatly improved, the efficiency of the photovoltaic conversion unit is greatly improved, and the output power and the energy conversion efficiency of the isotope battery are improved.

An automatic pallet loading / unloading method for radioactive waste drums is disclosed, which comprises the steps of: (a) providing a conveying pallet accommodating six radioactive waste drums; (b) arranging the pallet on an specific importing carrier; (c) performing a two-dimensional fetching position adjustment upon the pallet by the importing carrier; and (d) using a grabber crane to grab and carry the radioactive waste drums in a specific order so as to apply an continuous inspection process upon each radioactive waste drum successively. In a preferred aspect, the two-dimensional fetching position adjustment uses a transverse positioning operation cooperating with a lengthwise positioning operation to successively place each radioactive waste drum in a specific position to be grabbed by the grabber crane and thus to be inspected by the inspection process. In addition, an exporting carrier with two-dimensional position adjustment ability similar to that of the importing carrier is provided for receiving those radioactive waste drums after each has completed the inspection process, whereas an empty pallet placed on the carrier is moved with respect to the two-dimensional position adjustment of the exporting carrier so as to enable the radioactive waste drums after being inspected to set on the pallet in order appropriately. By the method of the invention, an automatic inspection process for radioactive waste drums can be achieved so as to prevent operators from getting radiation damage due to the exposure in radiation environment while operating inspection.

The invention relates to the technical field of medical instruments, in particular to a guide robot for conveying and reclaiming intervention catheters. The guide robot comprises a base, a rotary driver and a travelling driver; the travelling driver is used for clamping a catheter and controlling it to travel; a guide sleeve is nested in the base in the horizontal direction; the travelling driver is mounted within the guide sleeve; the rotary driver is mounted within the base; the rotary driver controls the guide sleeve to rotate relative to the base. During surgery, a distribution path of a vessel to be catheterized is observed in real time through an imaging apparatus, and the catheter is automatically conveyed through the travelling driver which clamps the catheter; in case of a branch, the rotary driver controls the guide sleeve to rotate relative to the base so that the end of the catheter in the guide sleeve is turned; medical staff can stay away from the imaging apparatus and operate the robot, so that radiation harm is effectively avoided for medical staff, and surgical quality, efficiency and safety is greatly improved.

The invention relates to a radioactive source loading and pouring-out driving device of a radio therapeutic machine, which is used for moving a radioactive source. A guiding groove corresponding to a source channel in the radio therapeutic machine and a source drawer channel of a source pouring container is provided, and a push-pull rod which reciprocates is correspondingly arranged at one end of a source drawer. The source drawer can be conveniently moved to a preset position with the help of the guiding groove and through the push-pull rod so as to pour out and load the radioactive source and to lay a foundation for automatic control, therefore, the automatic control can be easily realized, to completely replace manual operation. The driving device is simple, convenient and accurate, and can be operated separately, and prevent operators from being damaged by rays. Furthermore, the driving device is safe and reliable.

The invention discloses a direct collecting-photoelectric-thermoelectric combined isotope battery, which comprises a radiation source and an energy conversion structure. The isotope battery has a columnar structure, and two ends of the energy conversion structure are equipped with a battery positive electrode and a battery negative electrode respectively; the energy conversion structure comprises a metal substrate, a vacuum cavity, a transparent charge collecting plate, a photoelectric assembly and a thermoelectric assembly; the radiation source is arranged on the side surface of the columnar metal substrate, the transparent charge collecting plate is arranged in the periphery of the side surface of the radiation source, the vacuum cavity is arranged between the two, and the outer side surface of the transparent charge collecting plate is sequentially provided with a first transparent insulating substrate, the photoelectric assembly, a second transparent insulating substrate and the thermoelectric assembly; two ends of the photoelectric assembly and the thermoelectric assembly are provided with first electrical output electrodes and second electrical output electrodes respectively; and the surface of the energy conversion structure, and the positive electrode and the negative electrode of the battery are coated with a cushion, and the outer surface of the cushion is provided with an inner packaging cooling layer and an outer packaging cooling layer. The battery has the advantages of high energy conversion efficiency, large output power, strong environmental applicability, good work stability and long service life.

The invention relates to the field of fusion protein, and particularly provides fusion protein GST-SOD (superoxide dismutase)1-X-R9 as well as a preparation method and an application thereof. A linker peptide X and cell-penetrating peptide R9 are fused with a gene recombination technology according to the gene sequence of copper-zinc SOD in Genbank, SOD1-X-R9 is obtained, the synthesized SOD1-X-R9 is inserted into a pGEX4T-1 plasmid containing a GST sequence, pGEX4T-1-SOD1-X-R9 expression plasmid is obtained, and soluble protein GSTSOD1-X-R9 with high expression quantity is obtained through expression in Escherichia coli BL21 (DE3). The fusion protein GST-SOD1-X-R9 not only has activity of GST and SOD, but also can penetrate cells through R9 in a normal cellular environment and scavenging excessive free radicals in the cells, thereby protecting the cells from oxidative damage.

The invention relates to a bioremediation device and method for radioactively contaminated soil. The device comprises a temperature-controlled heating zone, a contaminated soil bioremediation reactor and a PLC monitoring system, which are sequentially connected, wherein a digital display type electric mixer, a micropore aerator, a pH automatic control device, an ORP automatic control device and a DO value automatic control device are arranged in the contaminated soil bioremediation reactor; the pH automatic control device, the ORP automatic control device and the DO value automatic control device are connected with the PLC monitoring system; and the PLC monitoring system comprises a PLC control panel and a server. The device and the method realize the effects of separating microorganisms from soil reaching standards and preventing operators from being hurt by radiation, and can effectively finish the treatment and remediation of the radioactively contaminated soil.

The invention relates to an image reconstruction method and system of a medical CT machine based on Compton back scattering scanning. The method comprises the following steps: receiving back scatteredlight of X-rays emitted by an X-ray source on one side of a measured target after the X-rays pass through the measured target by a detector on the same side; performing calibration calculation basedon a Compton backscattering differential cross section algorithm to obtain a calibration coefficient; calculating to obtain a linear weakening coefficient by combining a direct proportion relation between the linear weakening coefficient and the measured target electron density; and then determining a depth correction factor by taking a transmission measurement result of the X-ray passing throughthe other side of the measured target as a reference so as to perform depth correction on the linear weakening coefficient, and reconstructing a distribution image of the linear weakening coefficientbased on coordinates after depth correction so as to realize image reconstruction. The method is based on the Compton back scattering scanning principle, scattering correction and various artifact correction are not needed, the requirement for application conditions such as environment equipment is low, mathematical calculation is simple, scanning imaging is rapid, the image quality is good, and the fidelity is high.

The invention discloses a radiation monitoring method based on mobile phone cloud service. The method comprises the following steps: respectively obtaining a radiation intensity value and corresponding position information of a preset area through a radiation measuring instrument and a locating module; uploading the radiation intensity value and the corresponding position information to a cloud server; updating radiation state information corresponding to the preset area by the cloud server according to the radiation intensity value and the corresponding position information; uploading a radiation information request to the cloud server by a mobile terminal; obtaining the necessary radiation state information by the cloud server according to the position information of a user, and releasing the radiation state information to the mobile terminal; and generating a radiation state query result by the mobile terminal according to the obtained radiation state information. In the radiation monitoring method disclosed by the invention, the mobile terminal can determine whether a pregnant woman is in a strong radiation area at present according to the radiation state information containing radiation intensity data released by the cloud server so as to avoid radiation injury.

The invention relates to an X-ray flaw detector verification platform and a measurement method, and effectively solves the problems that an existing flaw detector is insufficient in penetrating power,radiation beams deviate, the irradiation sensitivity is poor and the leaked rays exceed the standard. The X-ray flaw detector verification platform comprises a center rack, a placing platform is fixed on the center rack; an X-ray flaw detector is fixed on the placing platform; a shielding cover is arranged outside the X-ray flaw detector; a rotating platform which can rotate and is arranged on the outer side of the placing platform in a sleeving manner is mounted on the center rack; a radial moving platform is mounted on the rotating platform; a transverse moving platform is installed on theradial moving platform, a lifting platform is installed on the transverse moving platform, a dosimeter is installed on the lifting platform. The platform can not only measure the radiation dose and the radiation beam size in a high-precision mode, but also visually and accurately draw the state of the radiation beam so as to improve the industrial flaw detection accuracy.

The invention discloses a device and a method for measuring the diameter of a dense pipe bundle and the thickness of an oxide film on site. The device comprises a plurality of rod diameter measurement units and a plurality of oxide film thickness measurement unit which are mounted on a measurement rack, wherein the rod diameter measurement units are all arranged in the same horizontal plane; the oxide film thickness measurement units are all arranged in the same horizontal plane; a channel, through which a sample supply pipe passes, is arranged inside each of each rod diameter measurement unit and each oxide film thickness measurement unit; the channel of each rod diameter measurement unit is correspondingly coaxial with the channel of each oxide film thickness measurement unit. By classification of the dense pipe bundle, the device can directly and precisely measure the diameter of the dense pipe bundle and the thickness of the oxide film at any position in the whole stroke on the site; in the measurement process, direct contact with a human body is avoided; a sensor is configured to measure tiny changes of the diameter and the thickness of the oxide film, so that the detection is safer, more efficient and more reliable; in case of failure of a certain measurement unit, the device still can complete the measurement work.

The invention relates to an automatic preparation method and device for <18>F-(2S,4R)-4-fluoro-L-glutamine. The method comprises the following steps: (1) capturing fluorinating reagent <18>F<->; (2 ) preparing <18>F<-> with nucleophilic reactivity; (3) carrying out a fluorination reaction; (4) purifying an intermediate; (5) carrying out an intermediate deprotection reaction; (6) carrying out purification and preparation of a product, wherein allowing a crude product solution obtained in the step (5) to pass a purification and preparation unit to prepare a <18>F-(2S,4R)-4-fluoro-L-glutamine product solution. Through the adoption of the automatic preparation method and device for <18>F-(2S,4R)-4-fluoro-L-glutamine, automatic preparation of <18>F-(2S,4R)-4-fluoro-L-glutamine is realized, the preparation efficiency and the stability are improved, meanwhile, an operator is protected from radiation damage, and the foundation is laid for clinical application of <18>F-(2S,4R)-4-fluoro-L-glutamine as a new metabolic imaging agent.