8 results about "High-dose radiation" patented technology

The invention belongs to the technical field of radioactivity detection, and particularly relates to a capacitive MEMS miniature high-dose radiation detection device and method and application, the device comprises a sensitive structure layer, a bonding layer and a bottom plate layer, the bonding layer is located between the sensitive structure layer and the bottom plate layer, and the sensitive structure layer, the bonding layer and the bottom plate layer define a closed vacuum cavity (5); a polymer material (9) is arranged in the vacuum cavity (5), and the amount of gas released by the polymer material (9) is in direct proportion to the received ionizing radiation dose. The sensitive layer elastic thin film is thin, deformation generated by pressure change of the vacuum cavity mainly occurs at the sensitive layer elastic thin film, the deformation quantity of the sensitive layer capacitance polar plate is small, and the linearity between the capacitance value variable quantity and the ionization radiation dose variable quantity is effectively improved.

The utility model discloses a miniaturized radiation-resistant anti-interference coaxial cable, which belongs to the technical field of coaxial cables, and comprises a coaxial cable main body, the coaxial cable main body comprises a plurality of inner conductors, the surface of each inner conductor is provided with a composite insulating layer, and the surface of each composite insulating layer is provided with a wire core shielding layer. A cabling wrapping tape is arranged among the surfaces of the plurality of inner conductors, a double-layer sheath layer is arranged on the surface of the cabling wrapping tape, and a filler is arranged in the cabling wrapping tape; the composite insulating layer comprises an inner insulating layer, the inner insulating layer is arranged on the surface of the inner conductor, a middle insulating layer is arranged on the surface of the inner insulating layer, the composite insulating layer is arranged, a multi-layer composite structure is adopted to jointly form a multi-layer radiation-resistant protection system, high-dose radiation can be effectively resisted, and the service life of the cable is prolonged. The service life of the cable in a radiation environment is greatly prolonged, and stable and reliable operation of the coaxial cable main body in a nuclear power station, space and other intense radiation environments is ensured.

The present application relates to the technical field of nuclear facility radiation monitoring and safety, and particularly relates to a radioactive source fixing device, an overhauling system and a use method. The radioactive source fixing device comprises: a support assembly, which is adapted to be connected with a calibrated pipeline; a fixing assembly, which is connected with the support assembly and is adapted to be at least partially inserted into the calibrated pipeline, and an end portion of the fixing assembly in the calibrated pipeline is provided with a radioactive source. The present application provides a radioactive source fixing device, an overhauling system and a use method to solve the problem that in the process of calibrating a detector by using a standard radioactive source, the operation is completely dependent on manual holding of the radioactive source in a strong radiation field (both the pipeline body radiation and the radioactive source radiation exist), the operator needs to be exposed to a high-dose radiation environment for a long time at a close distance, the radiation dose is large, and the ALARA principle is seriously violated.

The invention belongs to the technical field of radioactivity detection, and particularly relates to a piezoresistive MEMS miniature high-dose radiation detector structure which comprises a radiation sensitive layer, a strain amplification layer and a base layer which are arranged in sequence, a radiation sensitive material (3) arranged on the radiation sensitive layer generates controllable volume expansion after absorbing radiation, and the strain amplification layer is arranged on the base layer. And the strain amplification layer converts volume expansion into mechanical strain, converts the strain into resistance change by utilizing a piezoresistive effect, and is connected with a Wheatstone bridge and an external detection circuit to measure the variable quantity of output voltage so as to realize radiation dose measurement. The capability of measuring high-dose and high-energy radiation (greater than 10 kGy) and the advantage of direct sensing are combined together, miniaturization (the chip scale size is less than or equal to 5 mm * 5 mm * 1 mm) and high-dose range coverage (1 kGy to 100 kGy) are realized, and the distributed dose monitoring requirement in an extreme environment is met; the device is passive, free of maintenance, resistant to radiation damage and suitable for monitoring the accumulated radiation dose in the fields of nuclear industry, aerospace, medical irradiation and the like.

The invention discloses application of combination of dimethyl sulfoxide and thrombopoiesis promoting drugs in treatment of acute radiation sickness. It is found for the first time that a combined scheme of DMSO and thrombopoiesis promoting drugs can significantly improve the survival rate of animals irradiated by lethal and even super lethal dose, animal weight reduction caused by radiation is reversed, and a significant synergistic effect is shown. The invention provides a safe and reliable radiation prevention and treatment measure for patients suffering from acute high-dose radiation exposure, and has a wide clinical application scene.

The invention relates to veterinary medicine and concerns a drug for the prevention and treatment of radiation injuries in animals, and can be used when the body is exposed to radioactive isotopes. The objective of the claimed invention is to develop a drug for the prevention and treatment of radiation injuries in animals. The problem is solved by using bentonite in powder form, enriched with clover (1 / 1), as a drug for the prevention and treatment of radiation damage to the body of animals, with the addition of a dose of 10 g per 1 kg of feed, which is fed twice with an 8-12 hour interval, during the period of immediate threat of damage by radionuclides, and after damage, with the following ratio of components mass / %: bentonite - 45, starch - 8, clover - 45, purified water - 2. The technical result of the invention is the prevention and treatment of radiation damage to animals through the use of a special feed additive, an expansion of the range of means for combating radiation damage, a reduction in the level of pathologies caused by high-dose irradiation, and high chemical stability of the drug during storage.

The utility model discloses a high dose irradiation resistant cable structure, which comprises a cable protection layer, an irradiation resistant layer is fixedly connected in the cable protection layer, a filling hole is arranged on the surface of the irradiation resistant layer, a filling layer is fixedly filled in the irradiation resistant layer, a filling head is formed on the outer surface of the filling layer, and the filling head is fixedly connected with the cable protection layer. The filling head is fixedly connected with the interior of the filling hole, the insulating layer is fixedly embedded in the filling layer, the wire core is fixedly embedded in the insulating layer, the insulating layer and the wire core are fixedly embedded in the filling layer, the outer surface of the insulating layer is fixedly connected with the connecting strip, and the connecting strip is fixedly embedded in the filling layer. The outer surface of the cable protection layer is fixedly wrapped with the packaging layer, and the reinforcing strips are fixedly embedded in the packaging layer, so that the cable can be combined and reinforced, the auxiliary support of the surface is facilitated, the safety of pavement and use is improved, the combined processing is facilitated, and the connection and use are facilitated.

To provide a medical diagnostic apparatus, a data control method, and a data control program which are hardly affected by pile-up even during high-dose imaging.SOLUTION: The medical diagnostic apparatus includes at least one processor, and the processor acquires positioning imaging data obtained by scanography of a subject with a first dose before main imaging of the subject and main imaging data obtained by main imaging of the subject with a second dose higher than the first dose, corrects the main imaging data by specific processing using at least the positioning imaging data, and outputs the corrected imaging data.SELECTED DRAWING: Figure 3