162 results about "Doses rate" patented technology

A method for increasing the rate of thrombus formation and / or proliferative cell growth of a selected region (21) of cellular tissue (22) including the step of endovascularly irradiating the selected region (21) with radiation, having a dose range of endovascular radiation of about 1 Gy to about 600 Gy at a low dose rate of about 1 cGy / hr to about 320 cGy / hr, to increase thrombus formation and / or cell proliferation of the affected selected region (21). Preferably, the delivery means includes a deformable endovascular prosthesis (25) adapted for secured positioning adjacent to the selected region (21) of cellular tissue (22), and a radioactive source. This source cooperates with the deformable endovascular device (25) in a manner endovascularly irradiating the selected region with radiation, having the above-indicated dose range and low dose rate of endovascular radiation to increase thrombus formation and / or cell proliferation of the affected selected region (21).

Decision information systems, methods, and computer programs for better informing decisions to use multiple drugs in drug delivery devices, including implantable devices, for drug administration. Executable computer programs and logic embodying methods of the invention can calculate consistent multiple drug mixture amounts and drug delivery flow rates. One program accepts user input indicating a desired first drug dose rate, an initial first drug concentration, a desired second drug dose rate, an initial second drug concentration, and the reservoir size of the drug delivery device. The program method calculates a first drug amount and a second drug amount to combine in a mixture as well as a first drug true concentration in the mixture. The drugs can be mixed consistent with the physician's instructions using the program output. The first drug true concentration can be entered into a programmer device as the only drug concentration entered. Another program calculates a consistent first drug, second drug, and diluent amount to be added to a mixture for injection into a fixed flow rate, implantable drug delivery device. Methods preferably output true concentrations and dose rates for all drugs to be added and most preferably show all calculations used to arrive at the flow rate and mixture amount calculations. Yet another program receives a new desired drug dose rate for a previously filled device. The program accepts the existing mixture volume and true drug concentrations for a partially depleted device and calculates a new mixture flow rate to achieve the desired dose rate using the existing mixture. The methods can be implemented as executable computer programs in programmer devices, general purpose computers, servers, handheld computers, and personal digital assistants.

A medical accelerator system is provided for simultaneous radiation therapy to all treatment fields. It provides the single dose effect of radiation on cell survival. It eliminates the inter-field interrupted, subfractionated fractionated radiation therapy. Single or four beams S-band, C-band or X-band accelerators are connected to treatment heads through connecting beam lines. It is placed in a radiation shielding vault which minimizes the leakage and scattered radiation and the size and weight of the treatment head. In one version, treatment heads are arranged circularly and connected with the beam line. In another version, a pair of treatment heads is mounted to each ends of narrow gantries and multiple such treatment heads mounted gantries are assembled together. Electron beam is steered to all the treatment heads simultaneously to treat all the fields simultaneously. Radiating beam's intensity in a treatment field is modulated with combined divergent and pencil beam, selective beam's energy, dose rate and weight and not with MLC and similar devices. Since all the treatment fields are treated simultaneously the dose rate at the tumor site is the sum of each of the converging beam's dose rate at depth. It represents the biological dose rate. The dose rate at d-max for a given field is the individual machine dose rate. Its treatment options includes divergent or pencil beam modes. It enables to treat a tumor with lesser radiation toxicities to normal tissue and higher tumor cure and control.

A microbeam intraoperative, 10-50 kilovoltage radiation therapy system with multiple simultaneous microfocus X-ray sources and method for image guided, microsecond duration, 100 to 1,000 Gy microbeam radiation therapies with dose rate ranging from 1,000 to 20,000 Gy per second and RBE closer to high LET with minimal toxicity to normal tissue is provided. Dismountable coronal, sagital and transverse half-circle gantry sections are assembled on to a surgical table for mounting the microfocus X-ray sources for intraoperative radiosurgery. A stereotactic breast core biopsy system is adapted for combined breast biopsy, positron emission tomography and computerized tomography with phase-contrast imaging. Cosmetic whole breast preserving electronic brachytherapy is combined with stereotactic core biopsy. The low dose valley regions of the intersecting microbeams at the tumor site are filled with scattered and characteristic radiation from high Z-element that is bound or implanted into the tumor.

Methods of forming a low-dose-rate (LDR) brachytherapy device include depositing a solution comprising a soluble form of a radioactive material on a substrate. A water-insoluble form of the radioactive material is formed on the substrate by chemical precipitation and / or thermal decomposition.

A low-dose-rate (LDR) brachytherapy device having a spatiotemporal radiation profile includes an elongated body having a radioactive material in a spatial pattern to provide a spatial radiation profile with a radiation intensity that varies along a length of the elongated body. The radioactive material includes at least first and second radioisotopes having at least first and second respective decay profiles that together provide a temporal radiation profile that is different from the first and second decay profiles. The spatial radiation profile and the temporal radiation profile form a net spatiotemporal radiation profile configured to provide a radiotherapy plan for a patient.

The invention discloses a flash radiotherapy device. The device comprises a direct-current photocathode electron gun, a superconducting linear accelerator, an X-ray target and a collimator, wherein the direct-current photocathode electron gun transmits electron beams to the superconducting linear accelerator through the first transmission line; the superconducting linear accelerator transmits theelectron beams to the X-ray target through the second transmission line; and the electron beams bombard the X-ray target to generate X-rays, and the X-rays irradiate the target through the collimator.According to the flash radiotherapy device, the direct-current photocathode electron gun and the superconducting linear accelerator are adopted, long-macro-pulse high-dose-rate X rays can be provided, a very high irradiation dose can be given to a target area in a short time, and the requirement of flash radiotherapy is met. And the energy of the ray can be adjusted by adjusting the energy of theelectron beam, the time length of the ray is adjusted by adjusting the pulse length of the electron beam, and the dosage rate is adjusted by adjusting the flow intensity of the electron beam, so thata better radiotherapy effect on the target is achieved.

A method of using helium to create ultra shallow junctions is disclosed. A pre-implantation amorphization using helium has significant advantages. For example, it has been shown that dopants will penetrate the substrate only to the amorphous-crystalline interface, and no further. Therefore, by properly determining the implant energy of helium, it is possible to exactly determine the junction depth. Increased doses of dopant simply reduce the substrate resistance with no effect on junction depth. Furthermore, the lateral straggle of helium is related to the implant energy and the dose rate of the helium PAI, therefore lateral diffusion can also be determined based on the implant energy and dose rate of the helium PAI. Thus, dopant may be precisely implanted beneath a sidewall spacer, or other obstruction.

The invention discloses a verification and calibration device of an environment and protection level dosage (rate) instrument, and particularly relates to a protection level gamma ray air kerma standard device. A source compartment (1) mainly comprises a lead jar (11), a source rod (12) and an air cylinder (13), wherein the air cylinder (13) is arranged below the lead jar (11); the source rod (12) is vertically arranged in the lead jar (11); two attenuator systems (3) are arranged on two side walls of the lead jar (11) respectively; two collimators (2) are arranged in the lead jar (11), one ends of the collimators (2) are connected with the source rod (12), and the other ends of the collimators (2) are respectively connected to the two attenuator systems (3); and two three-dimensional testing platforms (4) are arranged on the side edges of the two attenuator systems (3). According to the protection level gamma ray air kerma standard device, two protection instruments can be simultaneously verified, the efficiency is doubled, and the detection efficiency is greatly improved.

The invention discloses a power VDMOS threshold voltage remote online automatic test system, which comprises a control computer, a data acquisition card, a test development board and a DUT plug-in development board in an irradiation source. The invention also discloses a VDMOS threshold voltage remote online automatic test method. The adoption of the method realizes VDMOS threshold voltage remote online accurate measurement in the irradiation environment which the experimenters can not enter, including total dose irradiation, dose rate irradiation, single particle and neutron irradiation, in addition, real-time display of a testing curve on the computer screen is realized and real-time display and processing of test results and the threshold voltage are realized.

The disclosure relates to a method for partial discharge testing of an insulation component, wherein at least one X-ray pulse is applied to the insulation component, an AC voltage is applied to the insulation component and the partial discharge induced by the at least one X-ray pulse is measured, wherein the dose rate of the at least one X-ray pulse is at least about 10−2 Gray / s. The disclosure relates further to a system for partial discharge testing of an insulation component which includes a flash X-ray source for generating at least one X-ray pulse, an AC voltage source, a voltage sensor, a partial discharge sensor and a partial discharge detection device for evaluating the measured partial discharge.

The invention belongs to the technical field of radioactivity detection and discloses a vehicle-mounted radioactivity detecting system. The system comprises a carrying device, a neutron detector, a GPS (Global Positioning System), a gamma ray detector, a power and a computer, and is characterized by also comprising a dose rate meter and a portable gamma spectrometer. The system has the advantages of detecting all directions at 360 degrees in a mobile state, directionally detecting in a stationary state, measuring the dose rate simultaneously detecting neutrons and gamma rays.

The invention discloses a memory total ionizing dose experimenting clamp. The clamp comprises a testing board, a carrying board and a computer, wherein the testing board is used for monitoring changes of current of a tested memory and data values thereof, and transmitting information to the computer; the carrying board is used for placing the tested memory, and providing an interface to ensure that the tested memory is communicated with the testing board; and the computer is used for processing and displaying the information transmitted from the testing board. The memory total ionizing dose experimenting and testing method determines the testing condition of the memory total ionizing dose, and comprises the following steps of: determining the offset condition when the memory is irradiated, selecting the dose rate during irradiation, carrying out 50% extra irradiation and high-temperature accelerated annealing test and determining electric parameter testing sequence after memory irradiation. The experimenting clamp and the experimenting and testing method improve scientificalness and accuracy of the memory total ionizing dose testing result.

The invention relates to a novel global critical accident alarm method and system. The method comprises the following steps: judging whether a critical accident occurs or not; when a critical accidentoccurs, judging the position of a critical accident area according to dose rate responses of detectors at different positions; and carrying out integral processing on a measurement value of the related detector to obtain the total fission times under the critical accident condition. The system comprises a detection unit; a critical accident judgment unit used for judging whether a critical accident occurs or not; a position confirmation unit used for judging the position of a critical accident area according to the dose rate response of detectors at different positions when a critical accident occurs; and a total fission frequency calculation unit used for carrying out integral processing on the measurement value of the related detector to obtain the total fission frequency under the critical accident condition. The beneficial effects of the invention are that the method can give an alarm and determine an accident point under the condition of a critical accident, and quickly estimatesthe size of the accident and the total number of fission times after the accident is finished.

The invention discloses a fixed radiation monitoring system. The system comprises a control part, at most eight detectors and an ionization chamber, the detectors are located on the ionization chamberand connected with the control part, and the detectors are one or more selected from a low-range gamma detector, a wide-range gamma detector, a NaI gamma detector, a high-range gamma detector and a neutron detector. Thus, the structure is simple, the stability is high, the energy response is sound, the dose rate range is wide, the angular response and cosmic ray response are sound, and the mechanical property is reliable; and the system can work for a long time, does not reduce the monitoring performance due to the working time, and can be applied to measurement and real-time alarm of the environment X-gamma external irradiation air absorption dose rate and neutron dose equivalent, dose rate monitoring alarm of a radiation diagnosis and treatment workplace, monitoring of a medical X-ray machine and an industrial radioactive source, dose rate monitoring of an underground radiation environment, and the like.

A method for in-situ monitoring both the balloon / cavity and the radioactive source in brachytherapy treatment utilizing using at least one pair of miniature gamma cameras to acquire separate images of: 1) the radioactive source as it is moved in the tumor volume during brachytherapy; and 2) a relatively low intensity radiation source produced by either an injected radiopharmaceutical rendering cancerous tissue visible or from a radioactive solution filling a balloon surgically implanted into the cavity formed by the surgical resection of a tumor.

The invention discloses a radiation field visualization system and a method thereof. The system comprises a robot device, an ultra-wideband positioning module, a wireless transmission module, a videoimaging module which is used for receiving and presenting video information collected by the robot device, a human-computer interaction module, a data pre-processing module, a database module, an interpolation calculation module and a visualization module. The particle dose rate information detected by the robot device and the positioning information determined by the ultra-wideband positioning module are preliminarily processed by the data pre-processing module, and then are stored in the database module. The interpolation calculation module uses an interpolation method to inverse the entireradiation field according to the dose rate information and positioning information, which are processed by the data pre-processing module, of each point of a plant space, and the radiation field is stored in the database module. The visualization module is used for presenting the radiation field in the forms of a thermodynamic chart and a contour map. According to the invention, a UWB positioningtechnology and the interpolation method are used; the radiation field visualization system and the method thereof have the advantages of accurate positioning and simple calculation; and radiation field visualization is realized.

The invention discloses a gamma absorption dose rate instrument having soil moisture correction. The gamma absorption dose rate instrument comprises a detector and a host. The detector comprises a shell and a detection head arranged in the shell. The detection head is vertically downward, and the top part is provided with a photomultiplier and a pre-amplification circuit in turn. The two sides of the detector are respectively provided with a supporting rod. The bottom part of the supporting rod exceeds the bottom part of the detector. The supporting rod is provided with a slide rod. A soil hygrometer is fixedly connected on the lower surface of the slide rod. The output end of the soil hygrometer is connected with the host. The actually measured data of the detector can be corrected in real time according to the moisture so that the data are enabled to be more accurate and reliable after moisture correction, and the requirements that the samples require to be used for comparison and judgment under the dry condition can be met.

An automated produced water treatment system that injects ozone or an ozone-oxygen mixture upstream of produced water separators, with the dose rate changing dynamically as the produced water quality changes, as determined by continuous monitoring of the produced water quality by a plurality of sensors that detect water quality parameters in real time. The system may operate as a “slipstream” injection system, that draws a portion of produced water from the produced water pipeline and injects ozone or an ozone-oxygen mixture back into the pipeline with disrupting or slowing normal operations. Disinfectants or other additives may also be injected. The treatment system may be wholly or partially contained in mobile containers or trailers, for on-the-fly use in existing produced water treatment facilities.

The invention discloses a self-correcting multi-cure-fitting digital dosage monitoring method and a system. The method comprises that data fitting is conducted in advance according to acquisition values, a fitting function is a piecewise function, an actual nonlinear relationship between ionization chamber output signals and actual dosage rate is established and the relationship is not a simple linear relationship. Thereby, the monitoring system of the invention can obtain accurate actual dosage rate and large deviation between the monitored dosage and the actual dosage is not caused even though the dosage rate is greatly changed.

The invention relates to a critical alarm device and system. A neutron detection unit detects the number of fission neutrons of a critical accident to obtain neutron detection data, and a lower computer compares the neutron detection data with a set alarm threshold and drives an alarm unit to send an alarm signal when the neutron detection data is greater than or equal to the set alarm threshold.Therefore, the situation that a critical alarm cannot be sent in time due to the fact that a detector exceeds the range under a high dose rate is avoided, and the accuracy and safety of the critical alarm are improved.

The invention discloses a detector device rapidly and accurately locating a radioactive source as well as a location method. By virtue of the device, the radioactive source can be rapidly and accurately located, and the device is mainly used for finding a lost radioactive source. By virtue of the device, the aims of improving efficiency of handling a radioactive source loss accident and reducing damage of radiation on workers are achieved. The device comprises a circuit electronic module, a fixed bolt, a circular ring provided with a threaded hole, an end cover shielding structure, a radioactive detector, a fixed seat for the radioactive detector, a main body shielding structure and a base shielding structure. The device performs accurate measurement on dosage rates in different directionsby virtue of reasonable combination of multiple detectors and shielding structures, a circuit electronic system is adopted for calculating the dosage rates in different directions, and finally a location of the radioactive source is accurately obtained. By virtue of the device, the aims of improving the efficiency of handling the radioactive source loss accident and reducing the damage of the radiation on the workers are achieved.

A method for electron beam nanolithography without the need for development step involves depositing a film of a resist comprising functionalized fullerenes on a substrate, and writing features by exposure to an electron beam with an accelerating voltage and dose rate sufficient to promote heating or thermal degradation of the functionalized fullerene in the irradiated volume such that a pattern is generated without a subsequent development step or with an aqueous developer. Lithographic features of about 1 nm or greater can be formed.

The invention relates to the field of developing and manufacturing a counting-type radiation detection instrument, in particular to a method of identifying the energy range of radiation from radioactive material and a system for detecting the same in a detection system. First, a digital dual energy window is provided on an electronic amplifier of the detection system; then regulate the threshold of the energy window with respect to the energy range of a source of interest; calibrate the dual energy window system with standard radiation sources and save the coefficient; detect the dose rate and intensity of the radiation source of an unknown energy range; and perform logical comparison, condition correction and mathematical fitting on the data; finally, display the energy range of the detected radiation source. The invention ensures the high sensitivity of the system to radiation and enables the system to identify the energy range of the detected radiation. Meanwhile, it has a simple design, good compatibility, and a wide range of usage. It does not need to be equipped with a complex apparatus, so it has a low operation cost and can be conveniently used in the counting-type radiation detection system for various purposes.

The present invention relates to a system and method for fluid flow control, for particular user in a hay baler. The system involves calculating or inputting a preferred flow rate (the Set Point), measuring the “actual” flow rate of liquid through the system, and controlling the speed of a pump used to move the liquid through the system to ensure that the flow rate is maintained as close as possible to the Set Point flow rate at all times during operation. The flow rate Set Point can be calculated using one or more user or sensor inputs, including the dose rate, the mass flow rate of fodder, the moisture content, etc.

The invention belongs to the technical field of counting tube devices (G01T1 / 18), and relates to a method for realizing wide-range radiation detection by using a single-GM counting tube. The method comprises two parts of high pressure control and dosage rate calculation on the basis of a dead time correction principle, and range expansion of the GM counting tube is realized by respectively adopting a method of combining hardware dead time elimination and software piecewise interpolation correction. Due to the piecewise interpolation, nonideal factors can be reduced, and especially, the influence to a measurement result by inconsistency of parameters of elements is reduced. Testing results of dosage apparatus prototype manufactured according to the invention prove that the measurement linear range and the detection upper limit of a J305 low-range counting tube made in China can be improved by 1000 times, and the detection range is 0.1uGy / h-300Gy / h. By adopting the invention, the single-GM counting tube can meet use requirements of most of radiation detection occasions.

The invention discloses a method for preparing hollow UO2 nanospheres by ammonium uranyl carbonate solution irradiation. The method includes: preparing low-concentration UO2(CO3)3<4-> alkaline solution containing a free radical removing agent; adopting electron beam or gamma-ray irradiation to obtain the hollow UO2 nanospheres, different in diameter, wall thickness and cavity diameter, formed by self assembly of nanoparticles through control of conditions such as absorbed dose and dose rate. A uranium oxide hollow nanostructure which is prepared for the first time is conducive to researches of application of uranium oxide nanoparticles to fields of nuclear fuel, catalysis and the like.

The invention discloses a safe monitoring method for a radioactive source during flaw detection. The method comprises the following steps: (1) when an automatic control instrument sends out a radioactive source working signal, comparing and analyzing by a central processor to obtain a result that the radiation dose rate of the radioactive source acquired by a radiation dose rate signal acquisition module is increased based on the background radiation dose rate and reaches the radiation dose rate of a source storage device, and obtaining that the radioactive source works normally; (2) when the automatic control instrument sends out a radioactive source storage signal, comparing and analyzing by the central processor to obtain a result that the radiation dose rate of the radioactive source acquired by the radiation dose rate signal acquisition module is reduced to be less than 30% of the radiation dose rate of the source storage device, and judging that the radioactive source works normally; comparing and analyzing by the central processor to obtain a result that the radiation dose rate of the radioactive source acquired by the radiation dose rate signal acquisition module is still not reduced to be less than 30% of the radiation dose rate of the source storage device, judging that the radioactive source is not recovered in the source storage device and the radioactive source works abnormally, and giving an alarm by an alarm module to finish the safe monitoring process.