21results about "Chemical dosimeters" patented technology

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.

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 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

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.

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.

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.

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.

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

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

The invention relates to a device (10) for measuring the dose delivered through a radiosensitive film (13) under exposure to ionizing radiations, to a system (20) comprising such device (10) and to the use of such device (10). More particularly, the device (10) comprises a reflection film (11); at least one light source (12); a radiosensitive film (13); and an optical sensor system (14) comprising a 2-D array of one or more photoresistor units and / or semiconductor units. The present invention also relates to a system (20) comprising the device (10) previously described; a readout integrated circuit unit (22) connected to the optical sensor system (14) of the device (10); and a processing unit (24) connected to the readout integrated circuit (22). The present invention also relates to the use of a device (10) as previously described.

Provided herein is a dosimetry device for quantifying the dosage of radiation emitted from a radiation source, the device comprising: (i) a radiation dose indicator; (ii) an optical means to capture the color change; and (iii) a software means to compare the optical density of the dose indicator as compared to a predetermined calibration curve. Also provided herein is a method of quantifying the dosage of radiation emitted from the radiation source. Further provided herein is use of said dosimetry device in various medical, food and industrial applications.

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 invention relates to a method and a device for determining a radiation dose which is undergone by an aqueous liquid by electron radiation. In the method, in the case of an aqueous liquid, which contains or consists of an organic dye and water, a degree of absorption or fluorescence of the liquid is measured before and after direct irradiation with electron radiation with an energy of <600 keV for a predetermined period of time, and from this, a difference is ascertained. A radiation dose, which the liquid has undergone by the electron radiation during the predetermined period of time, is subsequently determined from the difference. The method and the device make it possible to determine a radiation dose which is undergone by an aqueous liquid by electron radiation with an energy of <600 keV.

Methods of measuring a radiation dose implement and / or comprise measuring a first value of a mass of a sample, wherein the sample includes a polylactic acid (PLA) resin, and wherein the sample has been subjected to the radiation dose; immersing the sample in a solvent at a predetermined temperature for a first predetermined period of time; removing the sample from the solvent after the first predetermined period of time has elapsed; measuring a second value of the mass of the sample; and outputting a measurement of the radiation dose based on the first value and the second value.