54 results about "Dosimetry" patented technology

Carriers for embodying radioactive seeds, as well as a device for loading and customizing brachytherapy carriers based on the principles of optimizing a more precise and predictable dosimetry, and adaptable to the geometric challenges of a tumor bed in a real-time setting. The present disclosure relates to a specialized loading device designed to enable a medical team to create a radionuclide carrier for each patient and tumor reliably, reproducibly and efficiently.

The invention relates to the technical field of tumor radiotherapy, and discloses a radiotherapy parameter intelligent recommendation method based on disease species, target area volume and dose characteristics, and the method comprises the steps: firstly obtaining historical helical tomography radiotherapy data containing different disease species and dose schemes, and carrying out the standardization; then, non-iterative forward dose calculation based on full-factor experimental design is executed, and treatment simulation plans are generated in batches; then, dosimetry and efficiency indexes are extracted, and an optimization rule base containing a response surface model and a Pareto optimal solution set is constructed; and finally, processing new case features by using a decision tree model, and outputting a recommended collimator mode, a screw pitch, a modulation factor value and an expected index range. According to the method, data, a model and a decision closed loop are constructed, so that the defects that the traditional plan design depends on artificial experience, the trial and error cost is high and multiple targets are difficult to balance are overcome, and the efficiency and the quality consistency of the radiotherapy plan design are remarkably improved.

A plate for fixating bone, the plate comprising: a plurality of ribs defining a plurality of openings, wherein a first portion of the plurality of ribs define a lattice structure and a second portion of the plurality of ribs define at least four mounting holes. Another aspect of the present disclosure relates to a method for tailoring a plate for fixating bone. The method can include determining an initial design of the plate. The method can include analyzing radiation through the initial design. The method can include determining, based on analyzed radiation, if dosimetric characteristics are desirable. The method can include analyzing structural strength of the initial design. The method can include determining, based on the analyzed structural strength, if structural strength is sufficient.

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.

The present embodiments relate generally to enabling an end user - e.g. medical physicists - to monitor radiation therapy and, with integration to the LINAC, adaptive radiotherapy. Embodiments record signals already released during radiotherapy, requiring no new irradiation of the patient for in vivo, in line, dose monitoring. Furthermore, as the transducers will be coupled to the patient with ultrasound gel, the present embodiments are not invasive to patients and will not introduce new discomfort during therapeutic procedures. The addition of the RiAD system provides the end user with additional information during the treatment of the patient, allowing for real-time beam tracking and dosimetry, enabling the end user to practice adaptive radiotherapy. The RiAD system enables the end user to ensure that proper dose delivery is occurring with each new beamlet and dose deposition, empowering them to adapt the medical treatment as it is performed and increase its precision in conventional electron beam radiotherapy, electron FLASH radiotherapy, and intraoperative electron beam radiotherapy.

The invention relates to a radiotherapy oral mucosa reaction early warning and nursing system and a use method thereof, and belongs to the technical field of oral nursing. The system comprises a data acquisition module, a risk assessment module, an early warning prompt module and a nursing scheme generation module; the data acquisition module acquires electronic medical record data, radiotherapy plan data and radiomics characteristic data of a patient; the risk assessment module is based on data acquired by the data acquisition module. In the invention, by integrating electronic medical records, radiotherapy plan parameters and dose-specific radiomics characteristics, a multi-source data fusion prediction model is established, so that the limitation that a traditional method only depends on doctor experience and simple dosimetry parameters is overcome, and particularly, dose-specific mucous membrane subregions are generated through spatial Boolean operation; radiomics features capable of reflecting tissue heterogeneity of different dose regions are extracted, the accuracy and biological significance of a prediction model are remarkably improved, and early recognition of high-risk patients is achieved.

The present invention concerns dosimetry-related uses and methods that rely on a metastable technetium-99 (99mTc) radionuclide-comprising (dosimetric) radioimmunoconjugate (RIC) to evaluate or establish therapeutic doses of yttrium-90 (90Y) radionuclide-comprising (therapeutic) radioimmunoconjugates, both RICs targeting the same molecular target. More specifically, radioimmunoconjugates that comprise a CD66-binding component are used. Another aspect of the invention relates to Single Time Point dosimetry procedures replacing the need for traditionally used Multiple Time Point dosimetry procedures for yttrium-90 (90Y) radionuclide-comprising radioimmunoconjugates.

The invention discloses an in-vitro tissue thermal dose threshold determination method and system based on a thermochromic film, and belongs to the technical field of biomedicine ultrasonic dosimetry. The method comprises the following steps: preparing a thermochromic film with multiple color-changing temperature points, and calibrating a quantitative relationship between the hue and the temperature of the thermochromic film; constructing a sample formed by overlapping an in-vitro tissue, the thin film and a transparent phantom, and placing the sample in a focal region of a high-intensity focused ultrasound system; synchronously carrying out ultrasonic irradiation and film color-changing video acquisition; hue distribution of video frames is converted into temperature distribution through image processing, dynamic accumulation is carried out based on a thermal dose model, and a two-dimensional thermal dose distribution field is reconstructed; and finally, registering the thermal damage area after tissue irradiation with a thermal dose field, and extracting a thermal dose value on the outer side of the damage boundary to calculate a threshold value. The system comprises corresponding ultrasonic generation, sample bearing, image acquisition and control processing units. According to the invention, non-contact, real-time and two-dimensional visual measurement of the heat dose is realized, the system cost is low, and the heat dose threshold can be determined more objectively and accurately.

A system and method for determining accumulated radiation dose is presented. In some embodiments, the system and method include use of one or more RADFETs to measure and accumulated radiation dose over a desired period of time from an area of interest in a patient. In some embodiments, the one or more RADFETs may be arranged on a test strip, and electrical circuitry provided to selectively couple certain terminals of the RADFETS together to facilitate improved measurement of accumulated dose. A reader may also be utilized wherein the reader may receive a test strip, decouple the electrical connections between select terminals, inject a current into the RADFET and / or measure a voltage from the RADFET corresponding to an accumulated radiation dose.

This invention provides a hybrid manufacturing assembly of anatomical and workflow procedure in fabricating radiologically accurate animal phantoms. A method in which by utilizing additive manufacturing and molding technologies to fabricate the soft tissue, lungs, and hard tissue phantom of animal of interest and a way to assemble the organs such a radiologically heterogeneous phantom and structure is created and with the option to add provisions for radiological dosimetry devices is provided. The specified workflow is intended to address the need for low to medium volume production of small animal phantoms.

The invention provides a sample irradiation damage testing device and system under a hard XFEL condition, and relates to an intense light source experiment technology and radiation dosimetry. The device comprises a vacuum cavity, a posture adjusting mechanism, a dose testing mechanism, a sample table and a sample testing mechanism are arranged in an inner cavity of the vacuum cavity, the posture adjusting mechanism is used for clamping an attenuation slice, and the sample table is used for placing a sample; when an irradiation damage test is carried out, an XFEL light path is formed in the inner cavity of the vacuum cavity; and the attenuation sheet, the dose testing mechanism, the sample and the sample testing mechanism are sequentially located in a light path of the XFEL along the propagation direction of the XFEL. According to the invention, the irradiation dose of XFEL can be continuously, rapidly and accurately adjusted in a vacuum environment, and the tolerance limit of a sample can be given in real time.

The application discloses a matching method for realizing beam dosimetry equivalence between multiple treatment room units and related equipment, and belongs to the technical field of proton heavy ion radiotherapy. The method comprises the following steps: obtaining beam physical characteristic parameters of each treatment room unit under multiple mono-energetic beam conditions covering a clinical treatment energy region; defining a reference benchmark, taking the beam physical characteristic parameters of the reference benchmark as a target, and determining a matching parameter set for a to-be-matched treatment unit, so that the beam characteristics of the to-be-matched treatment unit are equivalent to the reference benchmark as a whole in a multi-dimensional characteristic space after adjustment; and the matching parameter set comprises physical additional module parameters and dose correction parameters. Through the hierarchical method of one-by-one matching of mono-energetic beams, multi-energy comprehensive iterative optimization, and unified matching parameter output, the method realizes dosimetry equivalent treatment between multiple treatment room units without the need of formulating a treatment plan again, improves the cross-device universality, treatment efficiency and safety of a multi-source multi-room proton radiotherapy system, and makes proton treatment available everywhere.

The present invention relates to a real-time dosimetry device for neutron capture treatments. The device comprises a first module (1) to absorb a flow of dispersed neutrons in a patient which impinge on the device. The first module (1) is made of a lightweight material such as high-density polyethylene, graphite, or a molecular compound, with lithium content. A second module comprises a first segmented gamma radiation detector (2) that is sensitive to radiation interaction positions therein, and a second segmented gamma radiation detector (3), which is also sensitive to the positions, the second gamma radiation detector (3) being detachably coupled to the first gamma radiation detector (2). The device is particularly suitable for real-time dosage monitoring in patients during boron neutron capture treatments (BNCT).

A method for varying the radiation dosage in vivo during brachytherapy treatment is provided. The method includes infinitely varying the volume of radiation exposed to the patient. This volume variation feature is utilized as clinically indicated and can further reduce the risk of slippage of the device in situ.

Various devices, systems, and methods for performing personalized dosimetry of a patient receiving a radiopharmaceutical are described. In an example method, anatomic data is generated by performing a computed tomography (CT) scan on the patient when they are lying down and wearing a garment. Based on the anatomic data, locations of organs of the patient are determined with respect to one or more fiducial markers integrated with the garment. Detectors for detecting photons from a radiopharmaceutical are placed on the garment based on locations of the organs. Subsequently, the patient may be administered a dose of the radiopharmaceutical. When the patient wears the garment, the detectors may detect photons released from the decaying radiopharmaceutical that is distributed in the organs. The radiation dosage to the organs may be determined based on the detected photons.

A computer-implemented method for radiotherapy contouring, the method comprising: receiving a dosimetric constraint for a physiological structure of a patient; determining a contour delineating and cl

The present application relates to a kind of quantitative regulation method of multiphase vanadium oxide and the application of multiphase vanadium oxide, belong to laser application technical field.The purpose of the present application is to solve the problems such as low thermal sensitivity of existing temperature measuring device, miniaturization is difficult, application is limited greatly, provide a kind of quantitative regulation method of multiphase vanadium oxide and the application of multiphase vanadium oxide;The temperature measuring device is based on femtosecond laser direct writing technology processing, without mask, can flexibly realize the characteristic regulation of thermosensitive material, high-precision microstructured preparation etc..Meanwhile, the temperature measuring device has high performance (high TCR, low noise) and high response speed, has microscale thin film design (can maximize the specific surface area of device), can be applied to calorimetric ionizing radiation dosimetry, microbolometer etc. technical field.

The utility model relates to the technical fields of head clamp, especially to a bilateral eye lens dose measurement head clamp, which is convenient for the installation operation of the device for users with different head sizes, improves the installation efficiency and installation effect of the device, avoids the falling of the dose in the process of use, and improves the practicability; including the head clamp main part of half ring structure, the both ends of head clamp main part all are provided with rotating lever respectively, the head clamp main part can hold human head, rotating lever can rotate relative to head clamp main part, the bottom of two rotating levers all is provided with fixed groove, and the fixed groove is provided with chuck for fixing detector, and the fixed groove and the cover are fixedly connected.

Method and system of enabling hearing protection for riders of motorcycles, or similar vehicles, rely on establishing a quantitative relationship of sound-pressure level (SPL) within a helmet to the magnitude of effective wind velocity with respect to the helmet. The helmet is equipped with instruments for measuring SPL, travel speed, and travel direction, as well as a controller configured to communicate with a wearer. The quantitative relationship is determined during a training journey. At any point during any subsequent journey, instruments' measurements together with the established quantitative relationship yield the ground wind velocity as well as the magnitude of effective wind velocity. A rider's permissible SPL exposure is determined from respective sound-pressure exposure history and approved hearing-health-care guidelines. A corresponding permissible effective wind speed is determined from the established quantitative relationship. A permissible travel speed is then determined from measured travel speed and direction, and the permissible effective wind speed.

Systems and methods for relative optimized linearization (ROL) for radiochromic film (RCF) dosimetry may eliminate the need for dose-response curve measurements while incorporating non-uniformity corrections. The ROL method may include, for each of multiple color channels, determining linearization parameters that minimize a cost function that evaluates an error between expected and calculated doses. The ROL method may use the linearization parameters to generate a variation map including dose-independent variation values and use the variation map to determine a corrected net optical density of the RCF. The ROL method may use the linearization parameters and the corrected net optical density to produce a dose image including corrected doses.

This invention discloses a matching method and related equipment for achieving beam dosimetric equivalence between multiple treatment chamber units, belonging to the field of proton and heavy ion radiotherapy technology. The method includes: acquiring beam physical characteristic parameters of each treatment chamber unit under multiple single-energy beam conditions covering the clinical treatment energy range; defining a reference benchmark; and determining a matching parameter set for the treatment unit to be matched, using the beam physical characteristic parameters of the reference benchmark as the target, so that its beam characteristics are adjusted to be overall equivalent to the reference benchmark in the multi-dimensional characteristic space; the matching parameter set includes physical additional module parameters and dose correction parameters. Through a hierarchical method of matching single-energy beams one by one, multi-energy comprehensive iterative optimization, and unified matching parameter output, dosimetrically equivalent treatment can be performed between multiple treatment chamber units without re-planning the treatment. This improves the cross-device versatility, treatment efficiency, and safety of multi-source multi-chamber proton radiotherapy systems, making proton therapy readily accessible.

The present disclosure provides: 177 The present invention relates to radiopharmaceutical compositions, methods, and kits containing Lu-PSMA I&T. The compositions, methods, and kits contain a PSMA I&T ratio of 4.4:1.0 to 7.6:1.0. 177 The composition may have a molar ratio of 100 to 1000 Lu. The composition may be formulated as a solution for injection, where the solution is suitable for administration at least 72 hours after formulation. The composition(s) have a radiochemical purity (RCP) of 95% or greater, 95.5% or greater, 96% or greater, 96.5% or greater, 97% or greater, 97.5% or greater, 98.0% or greater, 98.5% or greater, 99% or greater, or 99.5% or greater upon administration.

The invention relates to a hybridization probe mixed solution for radiation biological dose detection as well as a preparation method and a product thereof, and belongs to the field of molecular cell genetics. The technical problem to be solved is to provide a hybridization probe mixed solution with significantly improved chromosome distortion recognition accuracy and sensitivity, higher detection efficiency and better repeatability. According to the key point of the technical scheme, the hybridization probe mixed solution is composed of a probe and a hybridization buffer solution, the volume ratio of the probe to the hybridization buffer solution is 1: (50-1000); the hybridization buffer solution is a 40%-70% formamide solution containing 10 to 20 mM of Tris-HCl or PBS (Phosphate Buffer Solution). When the hybridization probe mixed solution is used for radiation biological dose detection, the distortion identification accuracy and sensitivity are high, the radiation dose estimation precision is high, and the operation is convenient.

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.

A phantom system is disclosed that includes a phantom and at least one removable phantom attachment configured to be attached to the phantom so that the phantom system may have an orientation, location and / or anthropomorphic feature identifiable to an imaging device.

Disclosed herein is a method of determining information regarding the location of energy deposition of an ion beam (14) in an absorptive medium, comprising the following steps: generating a pulsed ion beam (16), detecting a time-resolved acoustic signal, said time-resolved acoustic signal comprising an energy-deposition-signal component attributable to the energy deposition of an individual pulse of said pulsed ion beam in said absorptive medium, determining relative timing information of the energy deposition of said individual pulse with respect to said time-resolved acoustic signal, providing a matched filter for processing the time-resolved acoustic signal, and applying said matched filter to said time-resolved acoustic signal, deriving, from the filtered time-resolved signal, occurrence timing information related to the occurrence of said energy-deposition signal component in said time-resolved acoustic signal, and deriving information regarding the location of the energy deposition based, at least in part, on a delay between said energy deposition of said individual pulse and said occurrence timing information.

The present specification discloses a photobiomodulation therapy garment having a garment structure configured to be worn by a user atop a skin surface with one or more near-infrared light sources integrated with the garment structure. The near-infrared light source is configured to emit near-infrared light directed to one or more regions of interest of the skin at a wavelength between 600 nm to 1600 nm and at a predetermined dosimetry and duration. A controller with a processor and memory is in communication with the near-infrared light source to control the operational parameters of the near-infrared light source.

The present application relates to a kind of skull model and preparation method for head inside irradiation living body measurement device calibration, wherein the skull model includes skull, epidermis layer and radioactive source;The radioactive source is arranged on the surface of the skull, and is located on the skull corresponding parietal bone and frontal bone position;The epidermis layer is fixed on the surface of the skull by pouring, and is tissue equivalent material.The present application sets up radioactive source on the surface of the skull, and uses tissue equivalent material as epidermis layer, to form skull model, the model can simulate the deposition in the skull after human body is taken into parent bone nature nuclide, i.e.as the real human body nuclide intake amount according to the amount of radioactive source setting, so as to more accurately calibrate the scale of head inside irradiation living body measurement device, to improve the measurement precision of human body nuclide activity.