142 results about "Dose monitoring" patented technology

A charged particle beam irradiation system comprises a high-speed steerer (beam dump device) 100 disposed in a course of a beam transport line 4 through which an ion beam is extracted from a charged-particle beam generator 1. The beam dump device 100 is provided with dose monitoring devices 105, 106 for measuring a dose of an ion beam applied to a beam dump 104 so that the intensity of the ion beam can be measured without transporting the ion beam to irradiation nozzles 15A through 15D. Thus, the system is capable of adjusting the intensity of an ion beam extracted from a synchrotron without operating each component of a beam transport line, and an irradiation nozzle.

Described herein is a smart dose monitoring device. The dose monitoring device may include electronics such as motion sensors, orientation sensors, and timers related to monitoring the time of and amount of dose administered during an injection event.

A system integrates drug cumulative dosage monitoring, clinical information storage and workflow providing clinical notifications and worklists. The system monitors patient cumulative medication intake and includes at least one repository of information identifying medications and associated cumulative dosage limits for different time periods and for different types of patient. A monitoring processor, in response to a detected administration event indicating an additional dosage of a particular medication is to be administered to a particular patient, automatically determines whether a cumulative dosage, including the additional dosage, of the particular medication of the particular patient exceeds a cumulative dosage limit over a time period using information derived from the at least one repository. A notification processor automatically initiates generation of an alert message to at least one healthcare worker using a selected communication method The selected healthcare worker and the selected communication method is identified using predetermined notification configuration information.

A dose inhalation monitor includes a main body for containing medicine therein, a dose monitoring unit and a transmission device. The main body has a feeding mouth and a bypass communicated spatially with the feeding mouth. The dose monitoring unit is disposed on the main body, and includes a detector capable of detecting and converting a pressure within the bypass into a voltage level and a processor capable of processing the voltage level in order to generate an oral dose of medicine corresponding to the voltage level. The transmission device is connected to the dose monitoring unit for transmitting the oral dose of medicine to a distal receiver after receipt thereof.

The invention relates to a wireless network-based nuclear power station real-time personal nuclear radiation dose control system, and belongs to the technical field of nuclear reactor nuclear radiation protection. The control system comprises a wireless electronic dose meter, a wireless communication terminal, a wireless network base station, a voice terminal, a wireless voice server, a wireless network server, a wireless network controller, a wireless dose meter system server and a touch display screen terminal. The control systems provided by the invention are respectively arranged in a wireless network computer room, a monitoring area of a control area and a dose monitoring duty room and are worn on monitored personnel bodies. By the control system, not only the personal nuclear radiation dose information of monitored personnel can be monitored, but also the alarm information and the positioning information of the personal dose meter of the monitored personnel can be acquired in real time; and when an emergency happens, the personnel is controlled and the monitored personnel is remind of taking corresponding measures conveniently, so that the damage to nuclear power station working personnel caused by nuclear radiation is avoided, and the personnel safety of the nuclear power station working personnel is ensured.

A patient-portable medication event monitor is disclosed which is capable of detecting the dispensing of doses of a particular medication from the monitor, comparing the dispensing detected with information concerning the desired dosing regimen for the certain medication and displaying graphically to the patient at least one feedback indication of the patient's degree of compliance or deviation with the desired regimen.

A particle beam treatment device includes an irradiation nozzle which moves a particle beam in a direction which is perpendicular to an advancing direction; a dose monitor which measures the dose of the particle beam; a planning part which sets the irradiation dose applied to a target volume; and a controlling part which controls the irradiation dose applied to a target volume based on irradiation dose set value which is set by a value measured by the dose monitor and the planning part, wherein the planning part stores the absorbed dose distribution data in the depth direction which is prepared in advance using the absorbed dose at the reference depth which is a predetermined position nearer to an incident side of the particle beam than the position of Bragg peak as the reference and calculates the irradiation dose set value using the absorbed dose at the reference depth.

An in-vivo dose detector (41) for an HDR brachytherapy system (1; 31), wherein the detector is insertable into and movable through a catheter (15), and comprises a sensor (53) operable to detect radiation from a source (52) used to irradiate a tissue to be treated (9) in the course of an HDR brachytherapy treatment. A brachytherapy system and a method of dose monitoring are also disclosed.

The invention provides a dose distribution simulating method for a nuclear installation decommissioning radiation field. The method comprises the steps that firstly, the geometrical information, which needs to be simulated in a nuclear installation decommissioning scene, of the radiation field, the position of a radiation source and the geometrical information of a shielding object are determined; secondly, according to the position of the radiation source and the position of the shielding object, a dose monitoring point distributing network is built and used for extracting sample data; thirdly, according to whether there is the shielding object in the radiation field or not, dose distribution calculation is divided into partitioned dose calculation and non-partitioned dose calculation; fourthly, according to the sample data, a radial basis neural network model is built; fifthly, the dose value of any one point is calculated through an inverse distance weighted method; sixthly, the dose distribution of the radiation field is calculated. By means of the dose distribution simulating method, no radiation source term models are needed, the dose distribution of the radiation field is calculated by depending on a small amount of dose monitoring points, and the steps are simpler. By means of the dose distribution simulating method, the calculation of the dose distribution of the radiation field affecting the shielding effect is achieved.

The invention relates to a device and a method for demarcating and calibrating a dose monitoring detector in heavy ion beam cancer treatment. The structure of the device is characterized in that a collimator, the dose monitoring detector, a mini ridge-shaped filter, a water tank and a standard ionization chamber are arranged on a beam flux axis in sequence. The standard ionization chamber is arranged inside the water tank. The depth position of an irradiation beam mini spread-out Bragg peak in water is obtained by measuring absorbed dose of the standard ionization chamber at different depth in aqueous medium. At the depth position, the dose monitoring detector is demarcated and calibrated by the standard ionization chamber so as to obtain demarcating and calibrating factors of the measurement of the dose monitoring detector for the mini spread-out Bragg peak cancer treatment beam with a Gauss arrangement. With the demarcating and calibrating factors, the entire process of three-dimensional conformal irradiation therapy with uniform physical absorption dose or uniform biological effective dose in a tumor target volume can be conveniently controlled, the requirements of the treatment of different clinical cases in practical clinical treatment are satisfied, and the treatment efficiency of a treatment device is improved.

An integral data logging system for a jet injector includes at least one electrical switch that changes state (e.g. from OFF to ON) during an injection procedure. The switch(es) are connected to an electrical circuit having a microprocessor, a clock and an electronic memory. When a switch changes state, this information along with the applicable date and time is recorded in the electronic memory. A communications link is provided to upload the stored data to a remote computer for subsequent manipulation and analysis to determine compliance with a prescribed dosing regimen. In one implementation, the injection duration is logged by using a trigger release switch and an end-of-stroke switch. The end-of-stroke switch is configured to change state after the drive bar of the injector transits through the injector tube. The injection duration is indicative of dose amount and can be used to distinguish between valid and invalid injections.

The monitoring film recovering method includes the following steps: a). depositing shielding layer on new or recovered monitoring film; b). ion injecting into the monitoring film with deposited shielding layer; c). utilizing thermal wave apparatus to measure thermal wave value of the ion-injected monitoring film; and d) using hydrolfuoric acid steam to remove shielding layer and recovering the monitoring film which can be reused for monitoring ion injection doping dose.

The invention discloses an accelerator X-ray dosage monitoring device in an X-ray radiation imaging system. The X-ray radiation imaging system comprises an accelerator X-ray source, a collimator for collimating X rays and a detection probe. The X-ray dosage monitoring device comprises an X-ray dosage monitoring probe, wherein X-ray dosage measured by the detection probe is corrected according to the X-ray radiation dosage monitored by the X-ray dosage monitoring probe. The X-ray dosage monitoring probe is arranged on at lease one side of a collimating slit of the collimator and is used for monitoring the dosage of the X rays radiated from an accelerator; and by changing the positions of dosage monitoring points, the dosage monitoring probe is arranged on the collimator, the monitoring probe is close to an accelerator target spot and the dosage rate of the accelerator received by the monitoring probe is high, so that data has high statistic properties. Simultaneously normal beams are not blocked, so the statistic properties of probe data of the detection probe are not reduced.

The invention provides a radiation dose measurement method based on a quantum dot electroluminescent principle, which includes acquiring electroluminescent signals of an electroluminescent system based on a quantum dot in a radiation field through an image acquiring system, obtaining electroluminescent signal strength through processing and amendment, and obtaining radiation dose information according to functional relationship of the electroluminescent signal strength and the radiation dose. The novel radiation dose measurement method effectively improves space and time resolution of radiation dose measurement results, can be used for monitoring steady state radiation field dose, can also be used for monitoring pulse radiation filed dose, can obtain two-dimensionally or three-dimensionally distributed real-time information of the radiation dose, and can obtain radiation dose information with spatial discrimination reaching micron dimension.

The invention discloses an interlocking system for particle dose safety protection. The system includes particle accelerators, an in-accelerator beam cut device, treatment room front end beam cut devices, a beam dose detection device, multiple treatment rooms, transmission system main line beam cut devices, a first controller and a second controller, wherein the beam cut devices are disposed in the particle accelerators, and the transmission system main line beam cut devices are disposed on a main beam transmission line. The system is advantaged in that the system is tested through beam dose monitoring devices in the treatment rooms, once the dose delivered to a patient body is found to be out of the safe range, interlocking is triggered immediately, the beam cut devices at the different locations in a particle therapy system are controlled for beam cut, in this way, the purpose of multi-point beam cut and redundant beam cut is achieved, safety and redundancy of the interlocking systemare guaranteed, and safety guarantee is provided for particle radiotherapy.

The invention relates to an inhaler with dose monitoring function, comprising a body equipped with a drug supplying suction nozzle and a by-pass pipe communicated with the drug supplying suction nozzle, a dose monitor and a transmission device. The invention is characterized in that when medicament is inhaled by users through the drug supplying suction nozzle, the inner pressure of the by-pass pipe induced by an inductor inside the dose monitor is transformed into a voltage signal, which is then transformed into dose value by a processor, and the dose value is finally transmitted to a distant receiving end through the transmission device.

A reticle defect inspection apparatus that controls damage of a reticle by irradiation with an inspection light when the reticle is caused to be at rest is provided. The reticle defect inspection apparatus is a reticle defect inspection apparatus for inspecting for defects on a reticle using a pattern image obtained by irradiating the reticle on which a pattern is formed with light. The reticle defect inspection apparatus has a dose monitoring part for measuring a dose of the light to the reticle, a comparing part for comparing, after calculating accumulated irradiation from the dose measured by the dose monitoring part, the accumulated irradiation with a preset threshold, and a stop mechanism for stopping irradiation of the reticle with the light when, as a result of the comparison, the accumulated irradiation exceeds the threshold.

The invention particularly relates to a dose monitoring system of a medical accelerator, which is used for accurate dose of medical accelerator output dose. The dose monitoring system is characterized in that a power supply assembly (5), a scanning tunneling microscope (STM) main control plate (2) and two dose integration plates (3 and 4) are fixedly arranged in a shell (1) and are electrically connected, the shell (1) is a full-aluminum shielding shell, the input ends of the two dose integration plates (3 and 4) are respectively provided with interfaces and are used for connecting and receiving a current signal generated by a dose monitoring ionization chamber, the output ends of the dose integration plates (3 and 4) are respectively connected with the input end of the STM main control plate (2), the output end of the STM main control plate (2) is connected with a communication interface via a controller area network (CAN) bus and is used for data transmission with a main control system of the medical accelerator by utilizing CAN communication, and the commutation interface is arranged on the shell (1). By the dose monitoring system, the influence of external electromagnetic interference and mutual interference prior to internal components on the dose monitoring system is effectively reduced, the dose monitoring accuracy is improved, and the stability of the main control system of the medical accelerator is improved.

The disclosure describes a technique for monitoring patient utilization of inhaled Nitric Oxide as well as waste exhaust of Nitric Oxide in gases exhaled from patient lungs. By monitoring the real dose provided to a patient, actual compliance with therapeutic target doses may be monitored to improve patient safety and therapeutic benefit from inhaled Nitric Oxide. Simultaneously, unnecessary waste of inhaled Nitric Oxide may be avoided thereby increasing the cost effectiveness of Nitric Oxide therapy. The minimization of Nitric Oxide waste has the further benefit of reducing environmental Nitric Oxide and Nitrogen Dioxide levels in e.g. a NICU environment thereby mitigating medical personnel's Nitric Oxide and Nitrogen Dioxide exposure.

There is disclosed a dose monitor method comprising illuminating a mask with illumination light, which is disposed in a projection exposure apparatus and in which a dose monitor pattern is formed, passing only a 0th-order diffracted light through a pupil surface of the projection exposure apparatus in diffracted lights of the dose monitor pattern, and transferring a 0th-order diffracted light image of the dose monitor pattern onto a substrate to measure dose, wherein during the illuminating, a center of gravity of the 0th-order diffracted light image passed through the dose monitor pattern on the pupil surface of the projection exposure apparatus is shifted from an optical axis of the projection exposure apparatus.

The invention relates to a fixed integrated device for monitoring regional gamma neutron radiation. The device comprises a gamma detector, a neutron detector and a host system connected with the gammadetector and the neutron detector through an RS-485 communication network, wherein the host system is connected with a detection signal processing and display system, the gamma detector comprises a plurality of gamma probes, the neutron detector comprises a plurality of neutron probes, the detection signal processing and display system comprises a signal processor connected with the gamma probesand the neutron probes, and the signal processor converts detector signals of the gamma probes and the neutron probes into digital signals. The device is advantaged in that gamma and neutron dose monitoring and dose data management in complex radiation places such as a nuclear reactor are completed by using one dose monitoring system, a GM detector and a 3He proportional counter are selected as main detection instrument probes and are organically combined into a region gamma and neutron detection device, the monitor is beneficial to simplifying equipment complexity of a radiation monitoring system in a nuclear power facility place, and the arrangement space is saved.

The invention discloses a time sequence based proton or heavy ion radiotherapy dose real-time monitoring method, and belongs to the field of nuclear medical images. The method is based on a proton or heavy ion radiotherapy system and a prompt gamma photon imaging system, a projection sequence of prompt gamma photons generated in the spot scanning process of each rumor target region according to time sequence information of detected prompt gamma photons, rebuilding prompt gamma photon space distribution of the spot scanning process of each tumor target region according to prior information of the prompt gamma photons, and thus dose deposition space distribution of protons or heavy ions in the spot scanning process of the corresponding tumor target region is calculated, so that real-time dose monitoring for the proton or heavy ion radiotherapy process is realized. The dose monitoring method disclosed by the invention effectively utilizes the prior information of prompt gamma photon space distribution, the design of the prompt gamma photon imaging system can be simplified, influences of prompt gamma photon counting statistical noises can be reduced, and the accuracy of proton or heavy ion dose monitoring is improved.

A radiation head device for a linear accelerator comprises a ray generation unit, a dose monitoring unit, a function unit and a scattering isolating unit, wherein the ray generation unit is suitable for generating and emitting therapy radiation beam; the dose monitoring unit is used for measuring a dose of the radiation beam emitted by the ray generation unit in real time; the function unit is used for achieving at least one function of beam limiting, intensity modulation, flattening, shielding or filtering; the scattering isolating unit is covered on the outer surface of the function unit and is used for isolating the influences of scattering particles on radiation beam dose measurement in the dose monitoring unit, and the scattering particles are generated by a scattering function of the function unit on the radiation beam. By means of the above technical scheme, the accuracy of dose monitoring of an ionization chamber can be effectively improved, the structure is simple and convenience and practicality are achieved.

The invention relates to a thermoluminescent dosemeter dynamic distribution system and method. The dynamic distribution system comprises a thermoluminescent dosemeter storage box, a primary database, a backup database, a human-computer interaction display terminal, a scanner, a printer, a card reader and a thermoluminescent dosemeter card. The human-computer interaction display terminal is connected with the scanner, the printer, the card reader and an intermediate network. The primary database is connected with the intermediate network and used for saving work card information uploaded by the human-computer interaction display terminal, information of the thermoluminescent dosemeter card and information of the thermoluminescent dosemeter storage box. The backup database is connected with the intermediate network and used for saving the data of the primary database. According to the dynamic distribution system and method, the distribution number of the thermoluminescent dosemeter can be greatly reduced, personal dose monitoring cost can be reduced, the intermediate links of original fixed distribution can also be reduced, and monitoring effectiveness, reliability and management efficiency can be enhanced.

A gas scintillation detector is designed to provide in-beam absolute dose monitoring for ion beam radiotherapy treatments employing spot or raster beam scanning, especially with microsecond-scale beam pulses. Detection of prompt primary scintillation light emitted by gas molecules excited by beam passage provides electronic signals that can be processed to yield output data proportional to delivered dose up to high dose rates, and that appear quickly enough to provide feedback to influence real-time beam intensity adjustments for subsequent steps in the beam scan. When the scintillation light is collected in multiple photo-detectors, the invention is furthermore capable of measuring spot beam position with spatial resolutions of order one millimeter.

The present invention provides a radio therapy apparatus integrates fanctions of therapeutic design, analogue location, position-arranging restoration, intensity-regulating radiotherapy, dose-monitoring and control and prescriptino modification, having no need of moving patient and completing whole therapeutic process by one-step. It is characterized by that several cobalt-60 sources for making spiral tomoirradiation and matched collimator and correspondent location, safety-check and proving systems are mounte don the therapeutic main machine rotating-body structure-layer drum. It can raise intertarget dosage several times over and can reduce peripheral normal tissue damage dosage several time over.

An interventional system with real-time ablation thermal dose monitoring includes an interventional tool, an ultrasound transmitter at least one of attached to or integral with the interventional tool, an ultrasound receiver configured to receive ultrasound signals from the ultrasound transmitter after at least one of transmission through or reflection from a region of tissue while under an ablation procedure and to provide detection signals, and a signal processing system configured to communicate with the ultrasound receiver to receive the detection signals and to calculate, based on the detections signals, a thermal dose delivered to the region of tissue in real time during the ablation procedure.