113 results about "Radiation Dosages" patented technology

The invention relates to the technical field of regeneration of waste polyester, in particular to a polyester micro-plastic recycling and impurity removing method and equipment. According to the method, the irradiation technology is adopted for treating the polyester micro-plastic, the polyvinyl chloride is removed by combining electron beam irradiation with the specific gravity method, the radiation dosage and time are accurately controlled, the polyvinyl chloride in the polyester micro-plastic can be effectively removed, the color of the polyester micro-plastic is not affected, and the treated polyester micro-plastic can meet the spinning requirement. The equipment is used for realizing the impurity removal method and comprises irradiation treatment equipment, a separation tank, a cleaning tank, a dehydrator and a drying tower. The equipment is simple in structure and convenient to operate, the radiation dosage and time can be accurately controlled in the impurity removal process, the surface temperature of the polyester micro-plastic is effectively controlled, and production and popularization are easy.

An automated clinical decision support method for treatment re-planning that enhances a CBCT scan using information from an initial CT scan of the patient to create a synthetic CT scan; adapts contours of organ(s) and tumour(s) from the initial CT scan to align with the synthetic CT scan; and calculates a delivered radiation dose from the synthetic CT scan; compares these against an original treatment plan to detect deviations exceeding preset thresholds, and triggers alerts with assigned priority levels for a re-plan decision.

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.

The invention provides a half-circle multi-machine-head radiotherapy system and method, and the system comprises a beam generation assembly; the beam current control assembly is connected with the beam current generation assembly; the beam output assembly is connected with the beam current control assembly, and the beam output assembly comprises a plurality of treatment heads which are all connected with the beam current control assembly; the rotating motor is arranged in the treatment head; and the rotating target is fixed with an output shaft of the rotating motor, the rotating target is relatively rotatably connected with the treatment head, and the rotating target is arranged in the treatment head. Charged particles are generated through the beam generation assembly, then the moving direction of the charged particles is changed through the beam control assembly, the charged particles with the changed direction are distributed to rotating targets in a plurality of treatment heads within a giant pulse time, and different radiation doses are given to a focus at different angles by distributing different pulse numbers to the rotating targets.

Provided are methods and compositions for enhancing radiotherapy in various cancers by administering dopamine receptor (DRD2)‐binding phenylpiperazine derivatives such as brexpiprazole, cariprazine, pipamperone, and perospirone. In vitro studies show that combining these agents with ionizing radiation (e.g., 5 Gy) significantly reduces cancer cell survival, suppresses metastatic and stemness markers (e.g., CD44, MMP‑2, Snail, Nanog), and promotes apoptosis. Fractionated or single‐fraction radiation regimens can be paired with DRD2 antagonists to lower treatment‐resistant phenotypes, decrease the likelihood of recurrence, and potentially reduce necessary radiation dosages. The approach applies to breast, prostate, lung, pancreatic, and brain cancers, among others. Depending on tumor characteristics, additional chemotherapeutic or immunotherapeutic agents may further improve outcomes.

A method, system, and device for ultra-low-dose imaging of oral cone-beam computed tomography (CBCT) are provided. The method encompasses high-dose oral CBCT image data acquisition, data segmentation processing, three-dimensional (3D) reconstruction processing, model training, image data input, image enhancement, and image data output. Specifically, the process involves performing 3D reconstruction on 2D projection data of oral CBCT acquired in ultra-low-dose mode to obtain ultra-low-dose oral CBCT 3D reconstructed image data. This ultra-low-dose oral CBCT 3D reconstructed image data is then input into the oral CBCT ultra-low-dose imaging enhancement network model, from which high-quality oral CBCT image data is output for subsequent clinical diagnosis and treatment processes. This method significantly reduces the radiation dose of imaging while ensuring imaging quality, accelerates imaging speed, and enhances the safety of oral CBCT imaging, holding broad clinical application prospects.

The ability to improve the adjusting of technical parameters in therapy plans found by Pareto navigation constitutes a technical problem, along with facilitating the decision-making of the planner (also called user) and simplifying the mathematical calculation of the solution. Proposed is a way to find and establish a therapy plan among a plurality of plan proposals for cancer therapy, each plan proposal representing as a solution one point in a navigation space (N) containing a plurality of setting parameters and establishing in a machine space (M) a setting for radiation doses to be administered by a radiation therapy machine for cancer therapy. The navigation space (N) contains at least one Pareto front (200) behind or on which available treatment plans are located as possible solutions and among which a user navigates, whereby a first plurality of available solutions calculated in advance as plan proposals is provided in a memory and retrieved or read out from the memory for display. The retrieved or read-out plan proposals are shown on a display and used by the user for navigation, whereby a large number of Pareto-optimal solutions with physical values or evaluations of dose values can be found among the points. Moreover, such solutions are also shown that are almost Pareto-optimal, within a tolerance range of at most ±5% from the Pareto optimum. In this way, a large first set of points with the physical values or evaluations of dose values is created and then stored in the memory. From this, a second set of points is calculated, which defines clinical targets. A decision space (D) is provided and shown in which at least the clinical targets are plotted on target axes (76, 876, 776). This is without the possibility of navigating in the decision space (D) on the target axes of the clinical targets, whereas binary selections in the decision space are made in the manner of restrictors to specify which plan proposals are not used as therapy plans. This enables a desired therapy plan to be found and determined from the large number of plan proposals.

This invention provides a four-dimensional CT reconstruction method based on real-time kV image-driven reconstruction, including data preprocessing and four-dimensional CT reconstruction. Data preprocessing includes respiratory phase synchronization, spatial resampling, and geometric consistency registration and clipping. Four-dimensional CT reconstruction is implemented using a deep learning model based on a three-dimensional U-Net architecture. The model training adopts a supervised learning paradigm, using normalized prior three-dimensional CT volume data and corresponding two-dimensional kV projection images as joint inputs. Through multi-scale feature encoding and decoding structures, the model learns the mapping relationship between the two-dimensional projection images and the three-dimensional volume data, thereby predicting and outputting the three-dimensional CT volume data under the current respiratory phase. This application achieves an end-to-end closed loop from two-dimensional projection to four-dimensional CT to dose assessment, reducing the radiation dose required for image reconstruction, improving reconstruction speed, and ensuring spatial accuracy and temporal continuity, possessing feasibility and practical value for clinical application.

The disclosure provides a gateway edge system. The gateway edge system comprise (a) a clinical quality measure component comprising: a translation engine configured to receive data from a healthcare system, process the data to extract a plurality of elements, and translate the plurality of elements into a plurality of intermediate variables; and a clinical quality measure computation component configured to compute, based at least in part on the plurality of intermediate variables, a clinical quality measure indicative of whether a radiation dose is excessive, within a safe range, or inadequate; and (b) a data orchestration engine comprising a plurality of modules configured to receive and process the data according to a workflow and dynamically route the processed data to one or more entities that are in communication with the gateway edge system, and the gateway edge system is configured to be deployed within a firewall of the healthcare system.

The invention relates to a radiation treatment planning method and apparatus. The control circuit may be configured to generate a virtual target volume from the target volume of the particular patient and then generate a virtual bolus from the virtual target volume. The control circuit may then determine a corresponding radiation dose using the target volume and the virtual bolus, thereby optimizing a radiation treatment plan for a particular patient.

1. The name of the design product: radiation dose monitoring graphical user interface for electronic equipment. 2. The use of the design product: radiation dose monitoring for electronic equipment. 3. The design points of the design product: the content of the displayed graphical interface. 4. The picture or photo that best indicates the design points: interface change state diagram. 5. The use of the graphical user interface: the graphical user interface of the present design is used for radiation dose monitoring of electronic equipment. 6. Other circumstances that need to be explained: the front view is the initial interface, and the front view slides down to enter the interface change state diagram.

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 invention discloses a time correction method and device, a computer storage medium and a digital PET system. The time correction method comprises the following steps: step S100, carrying out in-ring time correction on crystal strips of a plurality of detection rings in sequence to obtain in-ring time correction values of all the crystal strips; s200, all coincidence events between every two adjacent detection rings are obtained in sequence, and the event arrival time of each coincidence event on the crystal strip is obtained; and S300, carrying out inter-ring time correction on the plurality of detection rings according to the position of the current to-be-calibrated ring, the in-ring time correction value and the average value or weighted value of the difference value of the arrival time of the two single events of each coincidence event. According to the invention, the overall time correction quality of the digital PET system can be improved, the image quality can be improved, the radiation dose can be reduced, and the inter-ring time correction of the long-axis PET can be realized at the cost as low as possible.

The mobile robot indoor kernel environment multi-target point inspection path planning method, the grid map of the indoor kernel environment is prior information, each grid in the grid map contains radiation field information and obstacle information; the method is as follows: 1. Multi-target point inspection path mathematical modeling: considering path length and cumulative radiation dose and turning energy consumption, respectively, an inspection path evaluation model and a pair of path evaluation model are established; 2, the upper algorithm is used to obtain the inspection path; 3, the lower algorithm is used to calculate the pair of path; 4, the optimal solution is obtained by the circulation of the two-layer algorithm. The advantages of the present application are: for the mobile robot MTIPP problem in the indoor kernel environment, the path length, the cumulative radiation dose and the turning energy consumption are considered, a double-layer mathematical model and a double-layer hybrid algorithm are established, and the inspection path obtained by planning has better safety and lower global cost compared with the path planning considering only single factor in the prior art.

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.

The invention provides a separable microcatheter and stent conveying system and method, and belongs to the technical field of neural intervention and vascular intervention. The system comprises a separable micro-catheter which is formed by detachably connecting a near-section micro-catheter (1) and a far-section micro-catheter (2) through a physical clamping structure; the stent conveying system comprises a conveying guide wire (3) and an intravascular stent (4), and the conveying guide wire (3) is provided with an anchoring stent (31) matched with the limiting cavity of the far-section micro catheter (2). The guide wire, the catheter and the stent conveying system are integrated, so that the vascular interventional operation process is obviously optimized. The system adopts a separable microcatheter design and a mechanical anchoring structure, so that a guide wire and a catheter do not need to be exchanged for many times in the operation process, and the number of times of instrument operation is fundamentally reduced. According to the invention, the operation time is shortened, the exposure time of an operator and a patient under X-rays is directly reduced, and the radiation dose is effectively controlled.

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.

The invention provides a ray equipment processing method and device based on image data and a storage medium, and relates to the X-ray equipment detection technology, the body information corresponding to a user is determined according to the image data of the user, a standard model is updated based on the body information to obtain a customized model corresponding to the user, and the posture image of the user is obtained. Synchronizing a model attitude of the customized model according to attitude information of the attitude image; generating reference information based on a comparison result of the model attitude and a standard attitude; starting ray equipment based on completion information of the reference information; obtaining a brightness parameter of a target area according to a regulation and control module; the regulation and control module is controlled to adjust the radiation dose in real time, the radiation dose of the X-rays can be accurately adjusted, and the accuracy during image imaging is improved.

Methods and systems of radiosurgical treatment include rotating one or both of a first gantry component and a second gantry component while transmitting a therapeutic treatment beam so as to deliver a therapeutic radiation dose to a target tissue of a patient from one or more arcs extending along a treatment sphere. The first gantry component is rotatable about a first axis and a second gantry component is interfaced with the first gantry component such that rotation of the first gantry component rotates both the first and second gantry components about the first axis. The second gantry component is independently rotatable about a second axis. The method includes coordinating movement of the first and second gantry components along the respective first and second axes so as to allow a trajectory of the therapeutic treatment beam to intersect the target tissue from multiple directions along the treatment sphere.

To provide methods for determining and administering appropriate doses of radiation.SOLUTION: Aspects of the present disclosure disclose a system and method for delivering for administering radiation to a patient. The method may include associating the patient with one of a plurality of coded dosage zones where each of the plurality of coded dosage zones corresponds to one or more values of a physical characteristic. The method may further include correlating the one of the plurality of coded dosage zones with a dose of radiation and then applying the dose of radiation to the patient.SELECTED DRAWING: None

The radiation delivery determination system includes a container that includes a first compartment defining an internal notch sized and shaped to receive a periphery of a radioembolization therapy delivery set, and a second compartment defining a pocket configured to receive a tube, the tube being in fluid communication with and adhered to the radioembolization therapy delivery set. The radiation delivery determination system further includes a radioactivity measurement device that is outside the container and configured to measure the amount of radiation in the radioembolization therapy delivery set and the tube.

The invention relates to a nuclear accident emergency exercise system based on simulation data transmission and feedback, and the system comprises a general control module which is used for receiving an external accident simulation result, constructing dose data and nuclide concentration distribution data required by simulation exercise according to the accident simulation result, and transmitting the dose data and the nuclide concentration distribution data to the general control module; the accident simulation result at least comprises radiation dose distribution and nuclide concentration; the data transmission module is used for data transmission between the master control module and the handheld monitoring module; the handheld monitoring module is used for handheld operation of exercise personnel, and can receive dose data and nuclide concentration distribution data generated by simulation data, obtain monitoring data of the surrounding environment and transmit the monitoring data back to the master control module; the monitoring data at least comprise nuclide concentration and dose varying data. According to the invention, the simulation data generated by the nuclear accident evaluation system can be transmitted to the handheld monitoring module of an on-site exercise person in real time, and is dynamically displayed on the handheld monitoring module, so that the reality sense and interactivity of the exercise are enhanced.

The invention belongs to the field of CT (Computed Tomography) tomography reconstruction technology and artificial intelligence, and discloses a finite angle CT reconstruction artifact suppression method based on a multi-domain feature fusion network. In order to solve the problem that image quality and defect detection precision are affected due to the fact that a reconstruction result of traditional CT scanning is prone to artifacts and structural distortion under the condition of a limited angle, a multi-domain feature fusion artifact suppression network is constructed, and a limited angle reconstruction result is used as input. Through the synergistic effect of the encoder part, the decoder part, the feature enhancement part and the feature conversion part, artifact suppression and detail recovery are realized. According to the method, high-quality cross-sectional images can be obtained under the limited angle condition, the scanning angle and time of industrial CT detection are effectively reduced, the imaging definition and reliability are improved on the premise that the radiation dosage is not increased, and the method is suitable for industrial detection of workpieces of complex structures and has important industrial application value.

The application belongs to the technical field of three-dimensional integrated circuits, and discloses a through-silicon via link total dose effect evaluation method, equipment and medium based on an equivalent circuit model, wherein the method comprises the following steps: establishing a total dose equivalent circuit topology structure according to a through-silicon via structure; determining a parasitic electric parameter calculation equation in the total dose effect equivalent circuit; calculating the value of the electric parameter under normal conditions, and comparing the S parameter obtained through simulation calculation with the actually measured S parameter to verify the total dose effect equivalent circuit model; optimizing the design, extracting the electric parameter in the equivalent circuit under different radiation dose conditions; extracting the electric parameter change curve with the radiation dose; fitting the equation of the material attribute change with the radiation dose; and predicting the S parameter of the through-silicon via link at any radiation dose point. The equipment and medium are used for realizing the through-silicon via link total dose effect evaluation method based on the equivalent circuit model. The evaluation factors are comprehensive, the actual irradiation conditions can be better matched, and the performance of the through-silicon via link under the actual radiation conditions can be more accurately simulated.

The invention discloses a capturing device of an inferior vena cava filter and a using method, and relates to the technical field of medical instruments. According to the capturing device of the inferior vena cava filter and the using method, the capturing device comprises a leading-in device, a snare catheter is movably installed in the leading-in device, a snare is movably installed in the snare catheter, a traction hook is movably installed in the leading-in device, and torque devices are installed on the surface of one end of the snare catheter and the surface of one end of the traction hook. According to the inferior vena cava filter, the traction hook provided with the inverted-U-shaped hook is additionally arranged, so that the operation space and angle are not limited, the inferior vena cava filter can be taken out only through one puncture point without assistance of other instruments, and the inferior vena cava filter is easy and convenient to operate, minimally invasive and safe; the operation time is obviously shortened, and the radiation dose of doctors and patients is reduced.

The application relates to a medical image acquisition method and device, computer equipment and a readable storage medium. The method comprises the following steps: acquiring a high-energy image of a detection object and low-energy images collected at different angles; based on the low-energy images, a tomographic sequence image is reconstructed; the tomographic sequence image and the low-energy images are subjected to a synthesis process to obtain a synthesis image; the synthesis image and the high-energy image are subjected to a subtraction process to obtain a subtraction image of the detection object. The method uses the synthesis image obtained from the reconstructed tomographic sequence image and the low-energy images to replace the low-energy images in the traditional subtraction, and the high-energy image is subjected to a subtraction process to obtain a subtraction image, so that the medical image required for the diagnosis of the detection object can be obtained on the basis of reducing the radiation dose of the patient.

The utility model relates to the field of waste polyester regeneration equipment, and discloses polyester micro-plastic impurity removal equipment. The equipment is used for realizing the impurity removal method and comprises irradiation treatment equipment, a separation tank, a cleaning tank, a dehydrator and a drying tower. The equipment is simple in structure and convenient to operate, can accurately control the radiation dose and time in the impurity removal process, effectively controls the surface temperature of the polyester micro-plastic, is easy to produce and popularize, and can be expanded and used according to different radiation methods.

The invention relates to the technical field of adjuvant therapy, and provides a radiotherapy tumor motion following system and method, which respectively controls the translational motion of a treatment bed and adjusts the motion parameters of an MLC blade based on a displacement vector from the acquisition of a respiratory motion signal and the inversion of the elastic modulus distribution of a target tissue to accurate displacement analysis. According to the following system, tumor motion compensation is obtained, all links are linked with one another, precise tracking and dynamic compensation of tumor motion are achieved, and compared with a traditional radiotherapy technology, the following system can remarkably improve radiotherapy precision, reduce radiotherapy errors caused by tumor motion and reduce the radiation dosage to surrounding normal tissues, and the radiotherapy precision is improved. And the problem caused by tumor movement in radiotherapy is solved from multiple dimensions.

According to the safe and intelligent management system and method for the iodine-131 radiation after the differentiation type A cancer operation, radiation safe and intelligent management of patients after the differentiation type A cancer operation is achieved in combination with the ward-round robot, and the radiation dose of the patients after the differentiation type A cancer operation and the surrounding environment can be dynamically scanned in a non-contact mode through the ward-round robot; the patient is intelligently predicted through the ward-round robot, the time T when the patient after the differentiation type A cancer operation meets the radiation discharge standard is predicted and output according to the radiation dose of the patient after the differentiation type A cancer operation and the surrounding environment, and data are reported to the background. Therefore, the background can judge whether the patient reaches the discharge time in a non-contact manner, intelligent analysis and prediction are realized, and non-contact operation is realized in the whole process, so that the operation procedure is simplified, a worker is prevented from being in close contact with the patient or urine of the patient in the operation process, and the personal safety is improved. And the technical defects of poor personnel compliance and extremely poor feasibility are overcome.

The present application relates to the technical field of bone density detection, and discloses a bone density detection method, comprising the following steps: step 1) image acquisition; step 2) image segmentation; step 3) three-dimensional surface reconstruction; step 4) three-dimensional body distribution reconstruction; and step 5) calibration calculation; the present application realizes rapid and accurate detection of lumbar vertebrae bone density by combining an automatic segmentation algorithm, a three-dimensional reconstruction algorithm and a gray density mapping technology based on Lambert-Beer's law, thereby providing a reliable basis for early diagnosis of osteoporosis; in addition, the present application is based on ordinary X-ray images, has low radiation dose and low equipment cost, is suitable for primary medical institutions and resource-limited areas, and has wide popularization value and application prospect.