24 results about "Dose verification" patented technology

The invention belongs to the technical field of radiotherapy dose simulation measurement, and provides a heavy ion fixed machine head radiotherapy dose simulation measurement method and system. The method comprises the following steps: firstly, in a solid water model, according to a layering and key area encryption sampling principle, carrying out finite point and / or cutting layer dose measurement to obtain sparse dose data and a sampling position; inputting the three-dimensional dose distribution and a sampling position mask into a coding-decoding structure and a mask perception neural network with an attention mechanism in a decoding stage, and outputting complete three-dimensional dose distribution; and finally, outputting a simulation result containing dose distribution and uncertainty distribution. The method improves dose reconstruction precision and clinical quality control efficiency, and is suitable for dose verification before heavy ion radiotherapy.

The invention discloses a processing and analysis system and method based on an SPECT / CT multi-modal image fusion technology, belongs to the technical field of image processing and analysis, and aims to accurately obtain the particle actual distribution and dose field distribution of different postoperative time nodes, such as within 24 hours, 1 month, 3 months and 6 months. The particle displacement rule and the influence on target core dose parameters are quantitatively analyzed, a dose coverage rate-curative effect response two-dimensional evaluation system is established, a basis is provided for clinical curative effect evaluation and subsequent treatment adjustment, an intelligent dose abnormal area identification tool is developed, and dose verification efficiency and precision are improved.

The invention discloses a carbon ion radiotherapy biological dose modulation system and method based on energy transfer linear density threshold triggering, and relates to the technical field of tumor radiotherapy, and the system comprises an image and target region data import module, an energy transfer linear density calculation module, a dual-model optimization engine module, and a dose verification module. According to the method, a double-model regional optimization framework with specific energy transfer linear density as a physical threshold value is initiated for the first time, a local effect model is taken as an example, the maximum relative biological effect of a low-energy transfer linear density region is adjusted by introducing a modulation factor, the absorbed dose is deduced by combining a corrected local effect model equation, and the energy transfer linear density is calculated. The method realizes accurate improvement of the biological weighted dose of the region, is compatible with a mainstream relative biological effect model, can guarantee the safety of the high-energy-transfer linear density region and the endangered organ dose only through software upgrading, guarantees accurate calculation of the energy-transfer linear density through standard water model experiment calibration, and is suitable for carbon ion radiotherapy of various hypoxia tumors.

This invention relates to a portable on-site detection device and method for Lu-177 radionuclide activity. The detection device includes a gamma detection assembly and a circuit board installed within a housing. The gamma detection assembly comprises several pieces, each housing a gamma detection module. The space formed by the gamma detection assemblies serves as a sample chamber, with a central slot for holding a Lu-177 carrier bottle. The gamma detection module employs a combination structure of a GAGG:Ce scintillator and a silicon photomultiplier tube (SiPM). The circuit board houses a connection module between the circuit board and the gamma detection assembly, a power conversion module, a signal summing circuit for the gamma detection assembly, a digital multichannel module, and a data analysis and transmission module. The testing method includes five steps, including device initialization. The beneficial effects are that it provides technical support for accurate pre-administration dose verification of Lu-177, ensuring medication safety for patients undergoing radionuclide therapy and improving the quality of clinical nuclear medicine treatment.

This specification discloses a dose verification method, apparatus, storage medium, and electronic device, relating to the field of radiotherapy technology. It can acquire target distance, equipment distance, detector convolution kernel, CT correction factor, detector dose data, and irradiation distances at multiple dose accumulation points. Based on the dose data at each coordinate point and the detector scattering convolution kernel, the initial deposited dose corresponding to each target point is determined. Then, based on the equipment distance, target distance, and the initial deposited dose at each coordinate point, the output beam intensity of the radiation device is determined. Based on the output beam intensity, initial deposited dose, equipment distance, CT correction factor, and irradiation distances at multiple dose accumulation points, the dose distribution at each dose accumulation point is determined. Finally, the dose distribution is compared and verified with the planned dose distribution. It is evident that the dose verification process considers the influence of various factors such as radiation device performance and detector position, thus improving the accuracy of dose verification.

This invention discloses an intelligent adaptive dose verification calculation method and system. The intelligent adaptive dose verification calculation method includes: obtaining preliminary dose distribution data for a patient based on a deep learning-based dose prediction model; dynamically assigning variance reduction parameters to particles in a Monte Carlo simulation based on the high and low dose distribution information in the preliminary dose distribution data, wherein the variance reduction parameters include simulation weights, with simulation weights assigned to particles predicted to be in high-dose regions being less than those assigned to particles predicted to be in low-dose regions; and using a Monte Carlo dose calculation engine, simulating the planned beam based on the dynamically assigned variance reduction parameters to obtain high-precision verification dose distribution data. This invention's intelligent adaptive dose verification calculation method ensures the physical authenticity of the final verification dose distribution and the credibility of the "gold standard."

The invention relates to the technical field related to medical image processing and radiotherapy, in particular to a research method for converting MR (magnetic resonance) to pseudo CT (computed tomography) for cyber knife dose calculation, which adopts a U-net convolutional neural network, takes a multilayer MR image as input, generates a high-precision sCT image, and realizes dose verification of a cyber knife system through an OA (quality assurance) phantom packaging technology. Clinical tests show that the dose difference between sCT and real CT in a key target region (GTV / PTV) does not exceed + / -0.4%, and the whole-brain mean absolute error (MAE) < lt >; according to the method, complete application of the MR-only working process in the cyber knife robot radiosurgery is achieved for the first time, the CT scanning requirement of a patient is remarkably reduced, the treatment efficiency is improved, meanwhile, it is ensured that the dose calculation precision meets the clinical requirement, and the method is suitable for brain tumor and other cases needing high-precision radiosurgery treatment.

The utility model discloses a non-uniform die body used for radiotherapy dose verification, firstly, the non-uniform die body mainly comprises a die assembly and a supporting assembly, secondly, the supporting assembly comprises a supporting seat and a supporting beam, the supporting seat is mainly used for fixing the die assembly so as to prevent the die body assembly from transversely moving when the die body assembly rotates, and the supporting beam is used for supporting the die body assembly. In order to guarantee the supporting effect of the mold body, a supporting beam is further arranged between the two supporting bases, the final model assembly comprises a fixing part, a film used for dose measurement and verification is horizontally inserted in the center of the axis of the fixing part, and the film is placed at the horizontal position of the center axis of the fixing part. In this way, it can be ensured that the dose distribution received by the film is an accurate representation of the dose distribution in the treatment plan, in the radiotherapy dose distribution, the central area is usually the area with the highest and most uniform dose, and therefore measurement can provide the most accurate dose verification data.

The application belongs to the technical field of radiotherapy dose simulation measurement, and provides a heavy ion fixed head radiotherapy dose simulation measurement method and system. The method first performs limited point and / or slice dose measurement in the solid water phantom according to the layered and key area encryption sampling principle to obtain sparse dose data and sampling positions; then inputs the sampling positions into the coding-decoding structure and the mask perception neural network with attention mechanism in the decoding stage, and outputs the complete three-dimensional dose distribution; finally, the simulation results containing the dose distribution and the uncertainty distribution are output. The application improves the dose reconstruction accuracy and the clinical quality control efficiency, and is suitable for heavy ion radiotherapy dose verification.

The invention discloses a product irradiation monitoring system and method, and relates to the field of product monitoring. The system comprises an irradiation source device, a product conveying device and an environment monitoring unit, and real-time correction is carried out by constructing a voxelization three-dimensional dose rate grid and combining source activity decay and air density parameters; a path integration algorithm is used to calculate a dynamic accumulated dose according to the instantaneous position and speed of the product, and the transmission frequency is adjusted in a closed-loop manner. The system is also integrated with a non-contact dose verification unit based on passive RFID for model calibration, and an excessive radiation estimation and automatic source reduction protection mechanism for a card chain fault. According to the invention, through multi-dimensional environment perception and dynamic integral calculation, the problems of low dose control precision and lack of real-time feedback in traditional irradiation processing are effectively solved, and the stability and safety of product irradiation quality are ensured.

The utility model relates to the technical field of applicator in cervical cancer radiotherapy, disclose a kind of verification cervical cancer after-loading radiotherapy real dose applicator, including applicator body and thermoluminescence detector.Applicator body includes guide tube and radioactive source support block, the one end of guide tube is used to connect with after-loading therapeutic instrument, radioactive source support block is fixedly connected with the other end of guide tube, and radioactive source support block is internally provided with the radioactive source cavity matched with the other end of guide tube, and installation groove is provided on the outer surface of radioactive source support block, and thermoluminescence detector is detachably installed in installation groove.It can improve the low problem of dose verification accuracy of conventional applicator in prior art.

This application relates to the field of radiotherapy technology, specifically to a method for predicting three-dimensional radiotherapy dose distribution for proton and heavy ion radiotherapy equipment. The method includes: generating a reference dose curve containing detector response and a standard three-dimensional dose distribution map under ideal conditions; calculating the gradient weights of each depth point to divide different sampling intervals and perform differentiated sampling to obtain observation depth points; obtaining the measured dose values ​​collected by the detector at each observation depth point; matching and mapping the sparse observation depth points onto the dense reference dose curve to determine the matching depth point corresponding to each observation depth point on the curve; calculating the intensity scaling factor characterizing the beam output intensity; calculating the range deviation characterizing the beam penetration depth; and performing spatial translation transformation and global dose correction on the standard three-dimensional dose distribution map to generate a predicted three-dimensional dose distribution map that eliminates detector interference. This application improves the accuracy and efficiency of dose verification for radiotherapy equipment.

The invention provides a VMAT plan patient dose verification prediction method and system based on Bayesian model uncertainty quantification, and is applied to the technical field of medical data processing. According to the method, a multi-modal classification model is constructed, a radiation field complexity feature and a flux graph are used as input, one-dimensional and two-dimensional branches are used for feature extraction and then fusion, a full connection layer is used for output, an Adam optimizer is used for training, variational Monte Carlo is combined, and data, the model and total uncertainty are calculated through sampling. Based on classification model output, through LASSO dimensionality reduction, in combination with classification probability and uncertainty, MLP prediction GPR is constructed, self-defined weighted MAE training is used, test samples are classified according to clinical thresholds, intervention is triggered by exceeding thresholds, and a patient dose verification prediction result is generated.

The present application relates to the technical field of radiotherapy control, and discloses a treatment control method and system for AB-BNCT. The method comprises the following steps: sending a beam-out condition verification request and a beam-out safety verification request in response to a beam-out request; sending a beam-out button display instruction after receiving the pass results, so that the beam-out button is displayed based on a preset state; monitoring main real-time beam data in real time in response to a state change of the beam-out button; determining a main real-time neutron absorption dose based on the main real-time beam data; and sending a beam control instruction to an accelerator based on the main real-time neutron absorption dose and a target neutron absorption dose, so that the accelerator controls the beam in response to the beam control instruction. By comparing the real-time dose with the target dose, the treatment is continued or stopped, and the accuracy of the treatment and the safety of the patient are ensured. The present application solves the technical problems of low safety and dose verification lag in the existing AB-BNCT treatment, and improves the safety and efficiency of AB-BNCT treatment.

The invention relates to the technical field of oral medicines of medical advice systems, in particular to an automatic packaging and time reminding control method for oral medicines in butt joint with a medical advice system. The method comprises the following steps: S1, acquiring medicine information of a patient from a medical advice system; according to the method, an algorithm of combining accurate reminding and multiple reminding modes with dynamic frequency adjustment is adopted, the missed taking rate is reduced, abnormal medicine taking is found in time, medical workers are notified, medicine taking on time is ensured, and medicine taking accuracy is ensured through automatic medicine distribution and independent packaging in combination with dose verification; the environment control function guarantees the medicine quality, full-process automatic management is achieved, remote monitoring and adjustment are supported, the workload of medical staff is reduced, and efficiency is improved; meanwhile, the system can be in butt joint with a hospital system, data can be shared in real time, medical staff can remotely monitor medicine taking of patients, running is reduced, the resource utilization efficiency is improved, operation is convenient through a touch screen or voice interaction, carrying and taking are convenient through independent packaging, and treatment confidence and satisfaction can be enhanced through a reminding mode.

The invention relates to the technical field of radiotherapy control, and discloses a treatment control method and system for AB-BNCT. The method comprises the following steps: sending a beam outgoing condition verification request and a beam outgoing security verification request in response to a beam outgoing request; after the passing results are received, a beam-out button display instruction is sent, so that a beam-out button is displayed based on a preset state; monitoring main real-time beam data in real time in response to the state change of the beam output button; determining a main real-time neutron absorption dose based on the main real-time beam data; and sending a beam control instruction to the accelerator based on the main real-time neutron absorption dose and the target neutron absorption dose, so that the accelerator controls the beam in response to the beam control instruction. By comparing the real-time dose with the target dose, the treatment is continued or stopped, so that the treatment accuracy and the patient safety are ensured. According to the invention, the technical problems of low safety, dose verification lag and the like in the existing AB-BNCT treatment are solved, and the safety and efficiency of the AB-BNCT treatment are improved.

The invention provides a system and a method for dynamic verification of radiotherapy plans, and the system comprises a three-dimensional electric platform, a three-dimensional electric reference mark support, a control unit and a software control module, and the three-dimensional electric platform is provided with a universal clamp which is used for bearing and fixing a dose measurement device. The three-dimensional electric reference mark support is independently installed on one side of the three-dimensional electric platform and used for fixing a reference mark visible to X rays, and the control unit is electrically connected with the three-dimensional electric platform and the three-dimensional electric reference mark support and used for controlling the reference mark according to the mode selected by the software control module and a motion trail instruction sent by the software control module. The software control module is used for driving the three-dimensional electric platform and the three-dimensional electric reference mark bracket to move independently or cooperatively, and comprises a motion management module for generating a motion track instruction, a mode control module for providing switching of a dose verification mode and a system performance test mode, and a dose analysis module for analyzing by adopting a Gamma algorithm. The real physiological movement of the patient can be simulated, the composite error is separated, and the adaptability is high.

Methods and system for facilitating rapid radiation treatments are provided herein and relate in particular to radiation generation and delivery, beam control, treatment planning, imaging and dose verification. The methods and systems described herein are particularly advantageous when used with a compact high-gradient, very high energy electron (VHEE) accelerator and delivery system (and related processes) capable of treating patients from multiple beam directions with great speed, using all-electromagnetic or radiofrequency deflection steering is provided, that can deliver an entire dose or fraction of high-dose radiation therapy sufficiently fast to freeze physiologic motion, yet with a better degree of dose conformity or sculpting than conventional photon therapy.

The application discloses a kind of based on wash-free film EBT3 whole central dose verification method, belong to radiation measurement technical field, specifically include: after irradiation, radiochromatogram film is continuously collected, and the driving voltage sequence of synchronous acquisition gray data and scanning device;According to the mean value of the driving voltage value and corresponding gray data of each collection time, the response function model between driving voltage and gray response is established;Predetermine target voltage, and determine the correction coefficient corresponding to each driving voltage value based on target voltage and the response function model, according to the correction coefficient, the preset dose-gray curve is corrected, the current film gray data and corresponding driving voltage are acquired, the gray value is corrected point by point using correction coefficient, and is converted into dose value based on corrected dose-gray curve, finally generates dose distribution chart.The application significantly improves the accuracy of dose measurement by real-time monitoring and dynamic correction of scanning voltage fluctuation.

Disclosed are systems and methods for a dosage verification system that can be used by a healthcare professional or an individual self-administering an injection to create a digital record that confirms the dose of fluid medicine drawn into the syringe prior to injection. The dosage verification system includes a medical syringe and an imaging device configured to visualize, selectively capture, process, store, and transmit a digital image of the syringe, thereby enabling the volumetric dose of fluid medicine drawn into the fluid chamber of the barrel to be identified and / or verified prior to injection.

The invention relates to the technical field of insulin management, and particularly discloses an insulin mistake-proofing labeling method and system based on multi-parameter intelligent verification, and the method comprises the steps: configuring an intelligent label integrated with a plurality of monitoring and sensing functions for each bottle of insulin medicine, the intelligent label comprises an RFID module, a two-dimensional code module, a bar code module, a temperature and humidity sensor, a storage environment monitoring module and a data transmission module. The data transmission module controls the RFID module, the temperature and humidity sensor, the storage environment monitoring module and the data transmission module to execute indirect activation and data compression transmission operation through an event-triggered wake-up mechanism and a self-adaptive duty ratio adjustment technology; according to the invention, the safety and accuracy of the insulin medicine in the using process are comprehensively improved by integrating technologies such as intelligent labels, temperature and humidity monitoring, dose verification and real-time data updating; the application of the augmented reality technology optimizes the operation experience of patients and medical staff, and further reduces the risk of use errors.

1. The name of the design product: radiation therapy three-dimensional dose verification device. 2. The use of the design product: radiation dose distribution measurement for radiation therapy dose verification link. 3. The design features of the design product: in shape. 4. The picture or photo that best indicates the design features: perspective view.

The utility model discloses a finger-type ionization chamber for dose verification, which belongs to the technical field of ionization chambers and comprises an ionization chamber handle, one side of the ionization chamber handle is provided with a chamber wall, the inner wall of the ionization chamber handle is in threaded connection with a waterproof jackscrew, two through holes are arranged in the waterproof jackscrew, the inner wall of the ionization chamber handle is in threaded connection with a sleeve, and the sleeve is provided with a through hole. A waterproof top ring is attached to one side of the sleeve and arranged outside the sleeve in a sleeving mode. According to the utility model, through the arrangement of the waterproof jackscrew and the waterproof top ring, when the waterproof jackscrew rotates, one side of the waterproof top ring can be extruded, so that the waterproof top ring is deformed, the waterproof top ring can be tightly attached to the waterproof jackscrew, the chamber wall and the sleeve, and gaps and through holes generated among the waterproof jackscrew, the chamber wall and the sleeve can be sealed; the sealing performance of the finger-type ionization chamber is improved, external moisture is prevented from entering the finger-type ionization chamber, the service life of the finger-type ionization chamber is prolonged, and the accuracy of a measurement result is improved.

The invention discloses a processing method for follow-up platform zero angle acquisition signal jumping, which comprises the following steps of: before a radiotherapy three-dimensional dose verification system follow-up platform starts dose verification work, setting and acquiring motion direction information of the follow-up platform during initial work through an upper computer; according to the motion direction information, initial constraint assignment is carried out on angle signals, collected by the follow-up platform, within the range of + / -0.1 degrees near the zero position; setting a corresponding network passing value according to the motion direction information; when the follow-up platform performs angle rotation to execute dose verification work, whether the follow-up platform passes through the network passing value is detected in real time: if the follow-up platform passes through the network passing value, a preset network passing mark is reversed, and the network passing mark is a bit variable; and in the rotation process of the follow-up platform, if the collected angle signal is in a zero position + / -0.1 degree range, performing constraint assignment on the angle signal according to the current network passing mark state.