39results about "Chemical dosimeters" patented technology

The utility model discloses a tool for rapid detection of an irradiation chemical dosimeter, which comprises a bottom plate, two sides of the bottom plate are provided with vertical plates, two fixing plates are arranged between the two vertical plates, one side of each fixing plate is provided with a plurality of test tube fixing holes which are arranged at equal intervals, test tubes are inserted into the test tube fixing holes, and the test tubes are fixed on the bottom plate. A plurality of cuvette fixing holes which are distributed at equal intervals are formed in one side, far away from the test tube fixing hole, of the fixing plate, cuvettes are arranged in the cuvette fixing holes, a cover plate is arranged above the cuvettes, a sealing block is arranged below the cover plate, two convex blocks are arranged on each of two sides of the sealing block, and clamping grooves matched with the convex blocks are formed in the inner walls of the cuvettes. The tool can rapidly detect the irradiation dose of the stoichiometric agent after irradiation, and the dose meter after irradiation is directly put into the spectrophotometer, so that the operation is extremely simple and convenient, the subsequent pipetting operation is not needed, the operation error is reduced, and the accuracy and consistency of the detection result are ensured.

The present invention relates to a composition for radiation dosimetry and to a use of the composition in radiation dosimetry, such as in radiotherapy treatment verification. The present invention further relates to a method of determining a three-dimensional radiation dose distribution. The present invention also relates to a method of preventing or treating cancer, particularly to a radiotherapy treatment of cancer patients. Furthermore, the present invention relates to a method of preparing a composition for radiation dosimetry.

Methods and computing apparatus for implementing a radiation dosimetry process. An example process may include exposing a first radiation sensitive film to a series of known doses of radiation, measuring a first set of radiation data with a measurement device, and determining a calibration curve. The calibration curve may be determined by selecting Raman spectral ranges based on the first set of radiation data, determining a plurality of band area ratios, and generating the calibration curve based on plotting the band areas and ratios compared to known dose. The radiation dosimetry process then exposes a second radiation sensitive film to an unknown dose of radiation, measures a second set of radiation data for the second radiation sensitive film with the measurement device, and determines a dose exposure level for the second radiation sensitive film by comparing the second set of radiation data with the calibration curve.

A method and computing device for performing a radiation dosimetry process is disclosed. An exemplary process may include exposing a first radiation sensitive film to a series of known radiation doses, measuring a first radiation data set with a measurement device, and determining a calibration curve. The calibration curve may be determined by selecting a Raman spectral range based on the first radiation data set, determining a number of band area ratios, and generating the calibration curve based on plotting the band areas and ratios in comparison to the known doses. The radiation dosimetry process then includes exposing a second radiation sensitive film to an unknown radiation dose, measuring a second radiation data set for the second radiation sensitive film with the measurement device, and determining the exposure dose level for the second radiation sensitive film by comparing the second radiation data set to the calibration curve.

The invention provides radiation sensitive films, radiation dosage indicators comprising these films, processes for preparing these films, and methods of use of these films in several industrial and domestic applications that require exposure to radiation for certain benefits. The radiation sensitive films comprise a radiation sensitive composition typically in the form of a film which is overlaid by an uncolored and optically transparent layer for increasing the radiation sensitivity of the films.

The invention relates to an ionising radiation detector, the detector comprising a scintillator, a monomer and a catalyst, wherein: - the scintillator emits non-ionising radiation after absorbing ionising radiation, - the catalyst catalyses the polymerisation of the monomer after absorbing the non-ionising radiation emitted by the scintillator, - the polymer resulting from the polymerisation of the monomer has a different colour from the monomer.

One embodiment of the present invention provides a method for producing a composition for a dosimeter, the method comprising a mixing step for mixing at least a portion of a plurality of raw materials for forming a composition for a dosimeter while supplying fine bubbles of an inert gas.

A method and computing device for performing a radiation dosimetry process is disclosed. An exemplary process may include exposing a first radiation sensitive film to a series of known radiation doses, measuring a first radiation data set with a measurement device, and determining a calibration curve. The calibration curve may be determined by selecting a Raman spectral range based on the first radiation data set, determining a number of band area ratios, and generating the calibration curve based on plotting the band areas and ratios in comparison to the known doses. The radiation dosimetry process then includes exposing a second radiation sensitive film to an unknown radiation dose, measuring a second radiation data set for the second radiation sensitive film with the measurement device, and determining the exposure dose level for the second radiation sensitive film by comparing the second radiation data set to the calibration curve.

The invention relates to an ionizing radiation detector, the detector comprising a scintillator, a monomer and a catalyst in which:- the scintillator emits non-ionizing radiation following absorption of ionizing radiation,- the catalyst catalyzes the polymerization of the monomer following absorption of the non-ionizing radiation emitted by the scintillator, - the polymer resulting from the polymerization of the monomer has a different color from the monomer. Figure for abstract: Figure 1

Apparatuses (devices, systems) and methods for shielding (protecting) surroundings around periphery of regions of interest located inside objects (e.g., patients) from radiation emitted by X-ray systems towards the objects. Apparatus includes: at least one radiation shield assembly including a support base connectable to an X-ray system radiation source or detector, and a plurality of radiation shield segments sequentially positioned relative to the support base, thereby forming a contiguous radiopaque screen configured for spanning around the region of interest periphery with a radiopaque screen edge opposing the object. Radiation shield segments are individually, actively controllable to extend or contract to selected lengths with respective free ends in directions away from or towards the support base(s), for locally changing contour of the radiopaque screen edge. Applicable for shielding (protecting) medical personnel, and patients, from exposure to X-ray radiation during medical interventions or / and diagnostics.

The invention relates to an ionizing radiation detector, the detector comprising a scintillator, a monomer, and a catalyst in which: - the scintillator emits non-ionizing radiation following the absorption of ionizing radiation, - the catalyst catalyzes the polymerization of the monomer following the absorption of the non-ionizing radiation emitted by the scintillator, - the polymer resulting from the polymerization of the monomer has a different color from the monomer. Figure for the abstract: Figure 1

The present invention relates to a method for forming an optical waveguide sensor for detecting ions containing radioactive isotopes in an aqueous solution. The method comprising the steps of treating a substrate surface by cleaning the substrate surface with one or more solvents for enabling coating of the treated surface with a crosslinking agent, the substrate being selected from a group comprising a silica or a silicon substrate, coating the treated substrate surface with the crosslinking agent selected from a group comprising carboxylic acid functional group containing organic molecules for forming a crosslinked substrate surface, coating the crosslinked substrate surface with a scintillating agent for forming a substrate surface containing scintillating agent, and coating the substrate surface containing scintillating agent with a ligand capable of reacting with a radioactive isotope in an aqueous solution for forming a functionalized substrate surface, thereby forming the optical waveguide sensor comprising a layer of the ligand and the scintillating agent. The present invention also relates to the optical waveguide sensor for detecting radioactive isotopes fabricated with the method of the present invention.

This invention discloses an oriented triplex dosimetry sensor (1) composed of three layers, namely, the photo-sensor made of large-resistivity semiconductor bulk-plate (4) pasted to the intermediate alanine layer (3), where radiation induced free radicals are detected by EPR technique, which is agglutinated further to a GaN scintillator (2) (Fig. 1), wherein (2), (3) and (4) layers of the triplex sensor are sequentially scanned by the spectrophotometer, the EPR scanner and the microwave detection system, where particle discrimination and fluence measurements are performed by correlating signals of the scintillator spectrum structure, the EPR signal amplitude and the photoconductivity decay lifetime, while depth variations of the accumulated dose serve for estimation of the radiation streamline. These small dimension triplex sensors can be composed into 1D cells comprising several face-to-face and in line deployed triplex sensors, while triplex sensor structures oriented in perpendicular directions are applicable for estimation of location of the radiation source.

Described herein is a biocompatible injectable dosimeter. The injectable dosimeter comprises a polymer gel and a radiation dosimeter material distributed in the polymer gel. The dosimeter material in the injectable dosimeter, when radiated, generates a dosimetric signal, which can be used to evaluate the delivery of the radiation. Also described are methods of using the injectable dosimeter, such as to report radiation in real-time and to protect tissues adjacent to the disease sites being irradiated.

Described herein is a biocompatible injectable dosimeter. The injectable dosimeter comprises a polymer gel and a radiation dosimeter material distributed in the polymer gel. The dosimeter material in the injectable dosimeter, when radiated, generates a dosimetric signal, which can be used to evaluate the delivery of the radiation. Also described are methods of using the injectable dosimeter, such as to report radiation in real-time and to protect tissues adjacent to the disease sites being irradiated.

The invention relates to an ionizing radiation detector, the detector comprising:- a monomer in a crystalline form,- and a catalyst incorporated within the crystalline form of the monomer, the catalyst catalyzing the polymerization of the monomer following absorption of ionizing radiation, the polymer resulting from the polymerization of the monomer having a different color from the monomer. Figure for abstract: Figure 1

The invention discloses an irradiation dose detection method and device, electronic equipment and a readable storage medium, and the method comprises the steps: a light source device emits initial light to a detection pool, and the initial light passes through the detection pool and a dosimeter in the detection pool to form measurement light; the detector receives the measuring light and distributes the measuring light to each detection unit; each detection unit detects the received measurement light to obtain the unit absorbance of each detection unit; the unit absorbance reflects the absorbance of the dosimeter under different index information; the data processor obtains the dosimeter absorbance according to the at least one unit absorbance; and the data processor obtains an irradiation dose result according to the dosimeter absorbance of the first measurement light and the dosimeter absorbance of the second measurement light. According to the invention, the situation of mutual interference of light rays of different index information is eliminated, the absorbance measurement precision is improved, the irradiation dose measurement error is reduced, and the data value is improved.

The invention relates to an ionising radiation detector, the detector comprising: - a monomer in a crystalline form, - and a catalyst incorporated within the crystalline form of the monomer, the catalyst being capable of absorbing ionising radiation and catalysing the polymerisation of the monomer after absorbing the ionising radiation, the polymer resulting from the polymerisation of the monomer having a different colour from the monomer.

This present disclosure provides a multilayer dosimetry system, comprising: (a) a mounting layer, wherein the mounting layer is an optically clear polymer film having two sides coated with an optically clear first adhesive; (b) at least two active layers, wherein the mounting layer is sandwiched between active layers by affixing to the optically clear first adhesive; and (c) (i) an optically clear top base layer affixed to upper side of the sandwiched structure of (b), and (ii) a bottom base layer affixed to bottom side of the sandwiched structure of (b). The present disclosure also provides a point dose measurement device comprising a multilayer dosimetry system. The present disclosure further provides an integrated system to measure point dose radiation and a process for measuring point dose radiation.

The present invention relates to a method for forming an optical waveguide sensor for detecting ions containing radioactive isotopes in an aqueous solution. The method comprising the steps of treating a substrate surface by cleaning the substrate surface with one or more solvents for enabling coating of the treated surface with a crosslinking agent, the substrate being selected from a group comprising a silica or a silicon substrate, coating the treated substrate surface with the crosslinking agent selected from a group comprising carboxylic acid functional group containing organic molecules for forming a crosslinked substrate surface, coating the crosslinked substrate surface with a scintillating agent for forming a substrate surface containing scintillating agent, and coating the substrate surface containing scintillating agent with a ligand capable of reacting with a radioactive isotope in an aqueous solution for forming a functionalized substrate surface, thereby forming the optical waveguide sensor comprising a layer of the ligand and the scintillating agent. The present invention also relates to the optical waveguide sensor for detecting radioactive isotopes fabricated with the method of the present invention.

The present invention relates to a composition for radiation dosimetry and to a use of the composition in radiation dosimetry, such as in radiotherapy treatment verification. The present invention further relates to a method of determining a three-dimensional radiation dose distribution. The present invention also relates to a method of preventing or treating cancer, particularly to a radiotherapy treatment of cancer patients. Furthermore, the present invention relates to a method of preparing a composition for radiation dosimetry.

To put a gel dosimeter to practical use.SOLUTION: A radiation dose measuring device uses a gel dosimeter 4 including a reactive substance 8 that reacts with a radical generated by an ionization action by energy imparted from a radiation 3, a measuring instrument 5 for acquiring a measurement value of a reaction amount of the reactive substance 8 reacting with the radical, and one or more computers 6. The computers 6 perform at least one of the processing for correcting the measurement value and obtaining a dose of the radiation 3 on the basis of a correction coefficient obtained beforehand, and the processing for checking whether or not the measurement value is correct.SELECTED DRAWING: Figure 1

This present disclosure provides a radiation dosage indicator comprising: a first ply comprising at least one radiochromic film having a substrate covering with an active layer; optionally, a second ply having at least one visible indicium is configured to underlay the first ply; optionally, a third ply overlying the first ply comprising at least a one viewing zone and the visible indicium; and a fourth ply having a colored lamination layer overlying the active layer of the radiochromic film, optionally a fifth ply having a complementary colored lamination layer overlying the forth colored ply, wherein the active layer is configured to change opacity in response to exposure to a certain radiation dosage exceeding an independently predetermined threshold of each radiochromic film; and wherein the visible indicium of the second ply is configured to be exposed to view through the viewing zone and providing a visual indication as to whether the indicator has been exposed to a radiation dosage exceeding the predetermined threshold. The present disclosure also provides a semi quantitative radiation dosage indicator. The present disclosure also provides a radiation dosage indicator used in the field of insect sterilization, phytosanitary, food sterilization, medical device sterilization, and cannabis irradiation.

This invention provides a beam dose and position distribution monitoring system and its usage method. The beam dose and position distribution monitoring system includes a detector, a pressure control device, a data acquisition module, a high-voltage module, and a host computer. The detector is equipped with a dose monitoring unit and a position monitoring unit. The pressure control device is connected to the detector to control the internal pressure. The high-voltage module provides the operating voltage required for the detector to perform monitoring. The data acquisition module and the host computer are used to acquire and process the dose and position distribution signals generated by the dose and position monitoring units. Compared with existing technologies, this invention can monitor the beam of both Flash radiotherapy and conventional radiotherapy. It can shorten the preparation time before each Flash radiotherapy session, improve the efficiency and efficacy of the Flash radiotherapy device, and reduce the equipment cost.

A printed radiation sensor that includes a substrate, an interdigitated electrode, and a conductive polymeric film. The interdigitated electrode including a first electrode with a plurality of first electrode digits and a second electrode with a plurality of second electrode digits. The interdigitated electrode disposed on the substrate. The conductive polymeric film including a blend of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and polyvinyl alcohol (PVA). The PEDOT:PSS is configured to provide an electrically conductive medium. The PVA is configured to provide ductility and stability of the printed radiation sensor. Upon radiation exposure, the PVA is further configured to crosslink within a material matrix of the printed radiation sensor militating against the recombination of chain scission by forming a semi-interpenetrating polymer network (SIPN) with the PEDOT:PSS to provide an enhanced and stable impedance reading.

The invention provides an irradiation dose detection device and an irradiation dose detection method. The irradiation dose detection device comprises at least one light source, at least one optical filter, a detection cell, a detector and a data processor, the optical filter is positioned between the light source and the detection pool; light rays sent by the light source penetrate through the light filter and then irradiate the detection pool; the detection pool is used for accommodating a dosimeter before irradiation and a dosimeter after irradiation; the detector is located on one side, far away from the optical filter, of the detection cell, and the detector is used for detecting the pre-irradiation absorbance of the dosimeter before irradiation and the post-irradiation absorbance of the dosimeter after irradiation in the detection cell; and the data processor is connected with the detector, and generates an irradiation dose result according to the absorbance before irradiation and the absorbance after irradiation. According to the invention, the accuracy of the irradiation dose result is ensured, the generation efficiency of the irradiation dose result is improved, and the traceability of data is realized.

One embodiment of the present invention provides a method for producing a composition for a dosimeter, the method comprising a mixing step for mixing at least a portion of a plurality of raw materials for forming a composition for a dosimeter while supplying fine bubbles of an inert gas.

To provide a dosimetry device for quantifying the dosage of radiation emitted from a radiation source.SOLUTION: A dosimetry device for quantifying the dosage of radiation provided herein comprises (i) a radiation dose indicator, (ii) optical means for capturing color changes, and (iii) software means for comparing optical density of the dose indicator to a predetermined calibration curve, and is configured to quantify the dosage of radiation emitted from the radiation source.SELECTED DRAWING: Figure 1