94 results about "External irradiation" patented technology

The invention provides an extrahigh energy electron beam or photon beam radiotherapy robot system which comprises a laser driving system, a laser plasma accelerator, an electron beam focusing system, a photon beam aiming system, a robot body and a laser beam stabilization system. The laser driving system generates and spreads intense laser pulses to the laser plasma accelerator installed at the tail end of the robot body, and therefore electron beams are generated; the electron beam focusing system guides the electron beams to diseased parts of a patient; the photon beam aiming system enables the electron beams to generate high energy photon beams so that extrahigh energy electron beam radiotherapy or photon beam radiotherapy can be performed; the robot body spreads the electron beams or the photon beams to the diseased parts of the patient in multiple directions; the laser beam stabilization system monitors the positions of laser beams and corrects errors. The extrahigh energy electron beam or photon beam radiotherapy robot system is more compact, more efficient, cheaper and easier to operate and has higher performance than an external irradiation radiation therapy system in the prior art.

The invention discloses a carbon dioxide reduction method which comprises the following steps: by using carbon dioxide as a raw material and a NaOH, Na2CO3 or Na2SO3 water solution with a certain concentration as a reaction solution and adding 0.2-5.0 g/L composite photocatalyst of oxide of Ti, Bi, W, V, Mo or Y, putting in an internal irradiation, external irradiation, suspension or liquid-film photocatalytic reactor, and introducing carbon dioxide at 10-60 mL/minute to carry out photocatalytic carbon dioxide reduction reaction at normal temperature for 0.5-5 hours by using a mercury lamp, xenon lamp or sunlight as a light source, thereby obtaining formic acid, methanol, methane and other carbon dioxide reduction products. The method has the advantages of simple technique and green reaction process, can catalytically convert the carbon dioxide into useful chemical products, and thus, has favorable economic benefit and environmental benefit.

A method of irradiating a target in a patient comprising directing a beam of radiation from an external source of radiation 24 at the target in the patient from numerous directions in a broad solid angle by longitudinally rotating the external source of radiation 24 around a central axis and simultaneously or sequentially, in either order, latitudinally rotating the external source of radiation 24; a globe gantry 21 comprising (i) a front opening ring 22 with its origin on the central axis of the globe gantry 21, (ii) at least one arc-shaped, gantry support arm 23, which has a front end and a rear end and is part of a circle, (iii) an external source of radiation 24, which is mounted on at least one arc-shaped, gantry support arm 23 and is movable along the gantry support arm to vary the latitude of the beam angle, (iv) a rear rotational axle 25 with an axis along the central axis of the globe gantry 21, (v) a support base 27, and (vi) a rear housing 26 comprising a source of power, mechanisms for moving components of the globe gantry 21, and controllers for controlling the movement of the components of the globe gantry 21 and the irradiation of the target in the patient; a system 20 comprising the globe gantry 21; and a method of irradiating a target in a patient using the system.

The invention discloses an automatic divisional sunglasses-adjusting frame structure, comprising a spectacle frame and two glasses legs connected with the two ends of the spectacle frame, a battery is arranged on the spectacle frame or the glasses legs, a photoelectric sensing module is arranged on the spectacle frame or the glasses legs to induce the external irradiation angle and illuminance of the sunlight, a control module is arranged on the spectacle frame or the glasses legs to control the transmittivity of the liquid crystal lens in the spectacle frame to change following the external illuminance and the incident angle, the battery is electrically connected with the control module and the photoelectric sensing module, the photoelectric sensing module is connected with the control module, the photoelectric sensing module is arranged on the outside and/or upside of the spectacle frame or the glasses legs which can induce the external illuminance. The automatic area sunglasses-adjusting frame structure provided by the invention can automatically adjust the transmittivity of the liquid crystal lens to change gradually in a variable gradient mode to automatically adjust the degree of light and shade of the liquid crystal lens according to the position and the intensity of sunlight.

The invention relates to a non-linear fusion method for internal and external radiotherapy doses of a cervical cancer. The method comprises: obtaining internal and external irradiation radiotherapy CT images and internal and external irradiation radiotherapy dose distribution of a to-be-detected cervical cancer; on the basis of non-linear image registration, mapping the internal irradiation radiotherapy CT image to the external irradiation radiotherapy CT image to obtain a transformation relationship between the internal and external irradiation radiotherapy CT images of the to-be-detected cervical cancer; according to the transformation relationship between the internal and external irradiation radiotherapy CT images, transforming internal irradiation radiotherapy dose distribution into equivalent external irradiation radiotherapy dose distribution; and carrying out fusion of the equivalent external irradiation radiotherapy dose distribution and external irradiation radiotherapy dose distribution after transformation by image fusion, rebuilding a distribution curve of internal and external radiotherapy doses, and obtaining a total practically subjected dose of a tumor target region of the to-be-detected cervical cancer and surrounding organs at risks during the comprehensive internal and external irradiation radiotherapy process. The non-linear fusion method is applied to an image-guided radiation therapy of a cervical cancer, thereby improving accuracy of radiotherapy dose evaluation.

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.

The present invention provides a prefabricated component which is used for container as intermediate product. The container is used for containing product therein. The product is food or milk product which is sensitive to radiation, especially to light. The prefabricated component is at least composed of a base layer (1) which is mainly composed of plastic-based material, and furthermore the base layer (1) is added with a certain amount of additive (5). The invention is characterized in that the prefabricated components (10, 20) are almost nontransparent in the whole area, wherein the plastic additive (5) with a relatively low percentage is introduced for generating nontransparent appearance (22) thereby protecting the confined inner space (9) from the external radiation (V1, V2) at the condition of normal atmosphere. The external radiation is specifically electromagnetic radiation, and more particularly the effect of light.

A radiation detector comprises two electrode arrangements, each including a dielectric substrate and an electrically conducting layer formed on a first surface of respective dielectric substrate, wherein the electrodes are oriented such that the conducting layers are facing each other. A dielectric spacer is provided to hold the electrodes at a distance from each other to thereby define an inter-electrode space, which, during use, is filled with an ionizable gas. The electrodes are held at respective electric potentials to drift electrons released during ionization of the ionizable gas by external radiation towards one of the electrodes for detection. To suppress the occurrence of sparks in the inter-electrode space an electrically conducting layer is formed on a second surface of the dielectric substrate of either one of the electrodes, and, during use, held at a selected electric potential held at a selected electric potential to thereby reduce the risk for occurrence of sparks between the cathode and anode arrangements.

The invention discloses a method for calculating dose of a radiotherapy ray plane detector and a matched system. The method comprises the content of calibrating parameters of a depth deviation model of a measurement plane; receiving a three-dimensional external irradiation treatment plan for a patient and a depth position of the measurement plane from a radiotherapy treatment planning system (TPS); calculating a depth deviation of the measurement plane of each beam according to a therapy apparatus head angle of the beam and the depth deviation model of the measurement plane; calculating a dosedistribution on the measurement plane after the depth position shifts according to the treatment plan and the depth deviation of each beam; superposing the dose distribution of each beam on the measurement plane after shifting, and generating the dose on the calibrated measurement plane of the detector.

The invention discloses a method for monitoring radioactive substances in a nuclear power plant control room. The method comprises the following steps: acquiring activity concentration of radioactive substances in air of the nuclear power plant control room; monitoring whether the external irradiation dose and internal irradiation dose of the control room reach values which harm a human body; if so, transmitting an alarm signal. A comprehensive and reliable technology for monitoring and processing the radioactive substances in the nuclear power plant control room is realized. In addition, the invention also discloses a system for monitoring radioactive substances in the nuclear power plant control room.

The invention discloses a neutron capture treatment system based on a proton linear accelerator. The neutron capture treatment system comprises a proton generating section for generating a high current proton beam, a proton acceleration section for accelerating and transporting the proton beam, a proton application section, and a control system. The proton application section includes a productionapplication system and a neutron capture treatment system; the production application system is used for producing and extracting radionuclide; and the neutron capture treatment system is used for external irradiation of a body tumor. The control system is in electrical signal connection with the proton generating section, the proton acceleration section, and the proton application section respectively. The neutron capture treatment system having advantages of compact structure, high integration, small size, great convenience of installation and reduced cost can be arranged in the existing hospital and has the BNCT treatment function and the radioisotope production function.

The invention discloses a dose rate estimation method and system based on a Monte Carlo voxel model. The method comprises the following steps: S1, performing three-dimensional reconstruction and two-dimensional conversion on a picture set to obtain a registered picture set; S2, performing organ segmentation on pictures in the registered picture set; S3, performing three-dimensional reconstructionon the segmented image set, and performing three-dimensional perspective reconstruction on organs in the organism; S4, operating to obtain a section diagram and a 3D reconstruction diagram of the voxel model of the organism; S5, calculating to obtain internal and external irradiation dose rate conversion factors between the source and the target; And S6, substituting the calculated internal and external irradiation dose rate conversion factors into a dose rate calculation formula, and calculating to obtain the total dose rate of the organism. The method and the system provided by the inventioncan be used for establishing a voxel model of a living body, estimating the radiation dose rate of the living body and improving the certainty of the estimation value of the dose rate of the living body.

The invention relates to an automatic curtain rolling system. The automatic curtain rolling system comprises a heat induction device, an outdoor light intensity detecting device, a curtain motor and a motor driving device. The heat induction device is arranged on an external wall corresponding to a curtain and used for outputting real-time heat induction temperature. The outdoor light intensity detecting device is arranged on the external wall corresponding to the curtain and used for detecting the external irradiation light intensity to output real-time outdoor light intensity. The motor driving device is connected with the heat induction device, the outdoor light intensity detecting device and the curtain motor and used for determining whether sending a rolling control signal to the curtain motor to roll the curtain or not according to the output of the heat induction device and the outdoor light intensity detecting device. By means of the automatic curtain rolling system, it can be avoided that external staff peep at the interior of a room through a window.

The invention provides a silicon-based laser device and a method for manufacturing the same, and relates to the technical field of semiconductors. The silicon-based laser device comprises a silicon substrate layer. A light emitting layer and a transparent conducting oxide layer are sequentially arranged on the silicon substrate layer, the light emitting layer comprises a quantum dot layer, and light waves can be generated by the quantum dot layer under external irradiation conditions; surface plasma resonance can be carried out on interfaces between the transparent conducting oxide layer and air under the external irradiation conditions; plasma resonance can be carried out on interfaces between the transparent conducting oxide layer and the light emitting layers under the external irradiation conditions. The silicon-based laser device and the method have the advantages that light with sufficiently high power can be outputted, light with sufficient intensity can be provided at normal temperatures, and the silicon-based laser device is simple in process and wide in application; the silicon-based laser device and the method are applicable to silicon-based integrated light sources in communication bands.

The invention provides a neutron and gamma integrated electronic dose monitoring device which realizes the function of simultaneously monitoring the neutron external irradiation dose and gamma external irradiation dose of a worker in a neutron and gamma mixed complex radiation field by integrating the measurement functions of neutron dose and gamma dose measurement, is convenient to carry. Instrument carrying burden of workers is reduced, and radiation safety of the workers is ensured. According to the invention, the neutron dose value and the gamma dose value are measured and displayed in real time and are visual and easy to read, an alarm is given when the dose exceeds the limit, and the personal radiation dose of workers is ensured to be at a reasonable and as low as possible level.

The invention relates to a bathtub with physiotherapy function and its use method, comprising a transparent bathtub cylinder body, the inner wall of the side of the transparent bathtub cylinder body for the human body to sit on is provided with a massage convex button, and the rear side of the massage convex button is There is an irradiation device for performing far-infrared irradiation physiotherapy on the back spine and the acupuncture points on both sides of the spine, a water inlet faucet is arranged on the handrail flange of the transparent bathtub cylinder body, and a water inlet is provided at the bottom of the transparent bathtub cylinder body to connect to tap water. The water outlet is connected to the filter element fixing frame containing the residual chlorine removal filter element of the water tap. The method of use is as follows: inject the hot water filtered by the residual chlorine removal filter into the transparent bathtub cylinder through the water inlet, and adjust the water temperature; turn on the irradiation device; Take a bath on one side, and use the far-infrared rays of the irradiation device to perform far-infrared external radiation physical therapy on the back spine and the acupuncture points on both sides of the spine. The bathtub is not only compact in structure, but also convenient to massage the back spine when soaking in the bath.

The invention discloses a fire identification algorithm based on fast Fourier transform. The spectral distribution condition of the flame radiation light is different from the spectral distribution of sunlight and other external irradiation light sources. When a fire rages, an algorithm is combined with a signal acquisition principle of an existing infrared pyroelectric sensor. Deep analysis offrequency domain characteristics and time domain infrared radiation energy is carried out on spectrums of all wave bands through fast Fourier transform, the flame recognition rate and the fire detection precision can be greatly improved, and therefore the phenomena of missed alarm and false alarm are reduced. According to the flame identification algorithm, data analysis of frequency domain characteristics is carried out on flame through fast Fourier transform. The accumulative analysis and calculation are carried out for data value in the frequency domain of specific frequency to acquire frequency amplitude and phase of different sine wave signals.. The flame recognition accuracy in a normal environment can be improved, the invention has higher accuracy in a part of occasions with fixed infrared radiation, and flame is analyzed from flame time domain energy.

The invention discloses a fixed protection sleeve of a needle tube, which mainly comprises a body. The body is provided with a squint window, and the upper end of the body is provided with a shielding cap, and the fixed protection sleeve is characterized in that the combined part of the shielding cap and the body is provided with inner threads anastomotic with an external diameter of the needle tube. The sleeve has reasonable structure, and ingenious conception; the shielding cap is used as the shielding between a doctor and the liquid medicament of a needle head so as to reduce the radiant quantity of the doctor; the combined part of the shielding cap and the body is provided with the inner threads, which effectively increases the direct friction force of the needle tube and the protection sleeve, plays a role in fixing the needle tube, reduces the operation time, achieves the conditions of external irradiation protection, namely the irradiated time is shortened as much as possible, and the shielding is arranged between people and a radiation source; and the sleeve embodies the people-oriented spirit, and has great popularization value.

The invention provides a voxel-based body external irradiation dose simulation method. According to the method, 3dsMax software is used to establish a virtual human model with a skeleton animation; dose distribution data in a virtual nuclear radiation field is initialized; according to a body structure and a skeleton structure of a virtual human, a body voxel model is established; body modules areallocated, and weights of all the modules and a body effective dose calculation formula are defined; an interpolation method is utilized to calculate an instant exposure dose rate and an accumulateddose of the virtual human; a body exposure dose is calculated based on the skeleton animation; and all the modules perform parallel calculation. Through the method, voxelization is not directly performed on a three-dimensional model of the virtual human, the steps are easier and more convenient, the voxel model can move along with human skeletons, and real-time dose evaluation is realized.

An apparatus configured to manufacture an article using a photoresist comprising photoresist material, the apparatus comprising:

• • a. a housing configured to receive the photoresist and locate the photoresist in at least one operational position in the housing;
  • b. an exposure system configured to emit radiation which is incident on the photoresist material when in the operational position, to induce a change in one or more properties of the area(s) of the photoresist material exposed to the radiation; and
  • c. a heater configured to heat the photoresist material to cure the photoresist material to the substrate when the photoresist is in the operational position, or is in a different operational position in the housing; wherein
  • d. the housing is radiation excluding such that external radiation cannot enter the housing at least to the extent that the external radiation is sufficiently excluded from the housing to prevent, or minimise polymerisation of the photoresist material, and further wherein the housing is a clean housing configured to prevent unwanted contamination from entering the housing, at least when the photoresist is located in the or each operational position.

The apparatus may be a floor standing or desktop apparatus, for producing single or multi-layered articles.

The invention provides an optical payload external stray light suppression method based on a ray tracing theory in the field of stray light suppression. The method comprises the following steps: step1, importing a built satellite preliminary model into ray tracing software; step 2, setting characteristic parameters of a star catalogue material, and establishing characteristics of an external radiation source; step 3, completing light tracing, and obtaining a stray light transmission path and a stray light transmission surface entering the interior of the optical payload; step 4, calculating an observation field angle range of the optical payload; step 5, according to the incident angle of the stray light on the transmission surface, a step surface with an inclined angle is established onthe stray light transmission surface, and the stray light is completely reflected out of the observation field angle range of the optical payload; and step 6, repeating the steps 1 to 5, and iteratingfor multiple times until all stray light is reflected out of the observation field angle range of the optical payload. The method is simple, and stray light caused by reflection or scattering of light through the surface of the satellite can be eliminated fundamentally.