9 results about "Stereotactic radiotherapy" patented technology

The invention relates to a real-time magnetic resonance guided head gamma beam stereotactic radiotherapy system, which comprises a magnet module, a gamma beam module, a treatment bed module and a source body driving assembly, the magnet module comprises a base, a left vertical yoke and a right vertical yoke which are arranged on two sides of the base, and a left magnetic pole and a right magnetic pole which are respectively arranged on the inner side of the left vertical yoke and the inner side of the right vertical yoke; the left magnetic pole and the right magnetic pole are arranged in parallel; a Y-axis linear guide rail is arranged on the base; the gamma beam module comprises a shielding body assembly, a source body assembly and a collimation body assembly, wherein the source body assembly and the collimation body assembly are arranged in the shielding body assembly and are coaxially nested. The shielding body assembly is fixedly connected with the left vertical yoke and the right vertical yoke; the treatment bed module is arranged on the Y-axis linear guide rail, and the source body driving assembly is connected with the source body assembly. According to the invention, clear imaging of cranial soft tissue in a high field intensity environment can be realized, gamma rays are guided to carry out real-time image-guided stereotactic radiotherapy, and the radiotherapy precision is improved.

The invention relates to the field of medical accelerators, and discloses a 4-pi stereotactic radiotherapy linear accelerator and a treatment method.The 4-pi stereotactic radiotherapy linear accelerator comprises a main cantilever, a secondary cantilever and a rack rotating assembly, and the main cantilever can rotate along a base in a circle; the rack rotating assembly is rotatably connected to the main cantilever; the secondary rotating arm can slide up and down along the rack rotating assembly, an accelerator is arranged on the top of the secondary rotating arm, and a multi-element collimator is installed on the accelerator. The method is implemented based on the device. The beneficial effects of the invention are that the main cantilever, the secondary cantilever and the rack rotating assembly are in cooperative linkage, so that the treatment efficiency is close to that of a volume arc intensity modulated (VMAT) technology, and the angle and number of beams can be greatly increased, thereby being capable of giving a higher dose to a target area and reducing the dose of surrounding normal tissues, enabling the beams irradiated on the normal tissues to be less, and improving the treatment efficiency. And the tumor tissue has more beams.

The invention relates to a double-layer multi-leaf collimator with a self-monitoring function and a using method thereof, and belongs to the technical field of radiotherapy equipment.The double-layer multi-leaf collimator is subjected to multiple times of image acquisition through an image acquisition assembly, the actual position and the preset position of a grating leaf are judged based on the self-monitoring function of a backlight path, and the real position of the grating leaf is determined. The leakage emission rate is further reduced, the dynamic intensity modulation capability is improved, an external sensor is not needed, and the system integration degree is high. Micron-scale control of the grating blade position is realized through optical feedback, and the high-precision treatment requirement is met. By utilizing the mutual shielding effect of the two layers of blades, the effects of simplifying the accelerator layout, reducing leakage radiation and improving the projection resolution of the blades are achieved, the device is mainly used for stereotactic radiotherapy of tumors and other adaptations, blade position errors caused by motor faults and mechanical faults of a multi-blade collimator are avoided, and the reliability of the device is improved. And irradiation errors are further avoided.

This application provides a method for measuring and analyzing the accuracy of a stereotactic radiotherapy system. The method involves sequentially performing geometric transformations on film images to calibrate the S-L and S-A directions, adaptively correcting positioning errors, purifying the target region through multi-dimensional interference removal, and denoising using normalization and adaptive weighted median filtering. Then, improved fuzzy C-means clustering with fused dual images is used to segment and output label images. Gray-level classification is used to extract the radiation field and tungsten sphere contours. After morphological optimization, the centroid position deviation is calculated. The system accuracy analysis is then completed by combining the S-L and S-A dual film deviations. This application solves the problems of inaccurate contour recognition and large centroid calculation errors in traditional detection methods, significantly improving the accuracy, stability, and robustness of the detection. The steps are clear, the parameters are quantified, and the method is repeatable, providing efficient and accurate technical support for AQA detection in radiotherapy systems.

The invention provides a method and system for predicting time sequence evolution of a brain metastasis tumor stereotactic radiotherapy curative effect, and the method comprises the steps: a time sequence image generation step: inputting the data information of a target brain tumor region into a generative adversarial network, and obtaining a time sequence image corresponding to the data information; a fusion prediction step: extracting image features of the time sequence image to form an image feature sequence, and fusing the image feature sequence with text features extracted by medical text description information in the data information to obtain a fused feature sequence; and inputting the fusion feature sequence into a learning model, and outputting a probability sequence with image content change characteristics at each time point in a future time sequence. According to the method, high-reality and coherent multi-modal MRI prediction images at a plurality of time points in the future can be generated, and a dynamic visual basis is provided for evaluating treatment response.

This invention discloses a control system for a two-stage collimator switching device, relating to the field of medical radiotherapy technology. The invention includes a host computer, a collimator controller, a pneumatic actuator, a quick-change device, a collimator placement platform, a power unit, a detection unit, and a safety interlock. The collimator controller is the core control node, capable of interfaceing with the host computer's radiotherapy plan and driving the pneumatic actuator to power the quick-change device, completing fully automatic online switching between multi-circular collimators and multi-leaf collimators. The detection unit achieves micron-level positioning verification, and the safety interlock provides hardware-level fault protection. It can simultaneously cover stereotactic radiotherapy for small lesions and conformal radiotherapy for large lesions, significantly improving the automation level, treatment accuracy, and clinical safety of radiotherapy, ensuring the safety of radiotherapy equipment use, and possessing strong industrial application value.

The present disclosure provides a device for treating solid tumors, a treatment plan planning method, equipment and system, relating to the technical field of medical devices, for solving the technical problem that the existing treatment plan has certain limitations. The device for treating solid tumors comprises a low-dose radiotherapy nested stereotactic radiotherapy system; the low-dose radiotherapy nested stereotactic radiotherapy system is used for low-dose radiotherapy on the whole of the solid tumor, and stereotactic radiotherapy on the local solid tumor. The present disclosure can formulate a reasonable treatment plan for a single solid tumor or multiple solid tumors of a patient through the synergistic treatment mode of low-dose radiotherapy and stereotactic radiotherapy.

The utility model discloses a cylinder system of an annular rack stereotactic radiotherapy device, and relates to the technical field of stereotactic radiotherapy. According to the utility model, the surface of the human body is divided into a plurality of areas according to a plurality of grid types, and information of the areas is transmitted to the cyber knife interaction robot; in the prior art, the cyber-knife interaction robot is provided with a high-intelligence processing system, and when coordinate information guided by the grids is obtained, the cyber-knife interaction robot can move according to actual conditions, so that the accuracy of movement of the cyber-knife interaction robot is improved, and the accuracy of movement of the cyber-knife interaction robot is improved. Specifically, after the grid coordinate lines are formed on the body surface, the grid coordinate lines are fixed, if the patient slightly moves in the period, the movement deviation of the grid coordinate lines can be found by the cyber knife interaction robot, and then fine adjustment is carried out when a focus is focused, so that accurate focusing is realized.

The utility model relates to stereotactic radiotherapy equipment for realizing dose tracking, which belongs to the technical field of radiotherapy equipment, and comprises a connecting piece, a dose detection assembly, an accelerator assembly and a folding telescopic mechanism, the interference caused by oblique incidence of the beam and the influence of inaccurate dosage are avoided; the dose detection assembly can follow a beam to carry out full spherical irradiation in real time through the semi-annular structure, in addition, when the dose detection assembly does not need to work or a quality control test is carried out, the dose detection assembly is automatically retracted to an initial position through the folding telescopic mechanism, on one hand, the effect of protecting the dose detection assembly is achieved, and on the other hand, the space is saved; the arrangement of the treatment bed is facilitated, the quality control test is not influenced, and the technical problem that the stereotactic radiotherapy equipment connected with the mechanical arm structure cannot acquire the dosimetry information in the radiotherapy process in real time is solved.