7 results about "Cone beam computed tomography" patented technology

The present disclosure provides a cone beam computed tomography system for proton therapy comprising an x-ray source configured to generate x-rays and positioned to rotate around a patient at a treatment isocenter, a detector assembly positioned opposite the x-ray source and configured to receive x-rays that have passed through the patient, a rotation mechanism configured to rotate the x-ray source and the detector assembly around the patient while maintaining their relative positions, a translation mechanism configured to translate at least one of the x-ray source, the detector assembly, or a patient couch during rotation to implement a wobbled scan orbit, and a scatter rejection grid attached to the detector assembly and focused on the x-ray source to reduce scattered x-rays. The translation mechanism distributes missing projection data across multiple radii and angles, enabling improved reconstruction quality through iterative reconstruction methods.

The application provides an oral cavity CBCT motion artifact correction method, device, equipment, medium and product, and relates to the technical field of data processing. The method comprises the following steps: acquiring oral scanning three-dimensional data of a target oral cavity and CBCT (cone beam computed tomography) projection data of the target oral cavity; determining initial oral cavity motion parameters according to the oral scanning three-dimensional data and tooth array three-dimensional surface data; determining oral cavity motion forward projection data according to the oral scanning three-dimensional data and the initial oral cavity motion parameters; and determining motion artifact correction parameters of the target oral cavity according to the oral cavity motion forward projection data, the CBCT projection data and the initial oral cavity motion parameters. The technical scheme of the application avoids introducing additional markers, so that the correction calculation speed can be faster and the correction accuracy can be improved without introducing new markers.

The embodiment of the application relates to the technical field of tooth correction, in particular to an automatic tooth arrangement method and device based on point cloud understanding, equipment and medium, the method comprises the following steps: acquiring tooth point cloud based on cone beam computed tomography image; the tooth point cloud comprises three-dimensional point cloud data of complete teeth containing tooth roots; tooth features are extracted based on tooth point cloud data and a graph convolution network of an attention mechanism; the tooth features comprise a global feature vector of a dentition and a local feature vector of the teeth; the tooth features are aggregated and updated based on a dynamic graph recommendation method to obtain a pose prediction result; the pose prediction result is optimized based on the aggregated and updated tooth features and an iterative optimization method to obtain a target pose result. The automatic tooth arrangement method based on point cloud understanding can automatically calculate corresponding target poses according to original dentitions of patients with malocclusion, and the accuracy of automatic tooth arrangement results is improved.

The application discloses a kind of dual-axis control method and system of cone-beam computer tomography equipment, it is related to equipment control technical field, including the following steps: obtaining the guide rail contact state data of rotating arm at different heights and angles, and construct guide rail load distribution topology;Load action line offset state is identified based on guide rail load distribution topology, and guide rail load distribution topology is time-sequenced expansion based on offset state, and guide rail stress imbalance set is obtained;Based on guide rail stress imbalance set, the target motion path of rotating shaft and lifting shaft is coupled reconstruction, and dual-axis collaborative motion trajectory is obtained;The motion speed change process of rotating shaft and lifting shaft is coordinated and adjusted, and load balance state is obtained;Dual-axis driving control instruction is generated based on load balance state and controls rotating arm to complete posture adjustment process, solve the problem that guide rail contact interface stress imbalance is caused by the dynamic change of load distribution of rotating arm in dual-axis collaborative motion process.

The present invention relates to a dental implant detection system configured to support accurate detection of dental implants using cone beam computed tomography (CBCT) data. More specifically, the present invention relates to a dental implant detection system that integrates multi-angle CBCT projection and deep learning, wherein the system converts three-dimensional CBCT data into multi-angle projection images, automatically detects the location and status of an implant by optimizing image quality and applying deep learning algorithms, thereby minimizing time-related and human errors that may occur in conventional manual diagnostic methods and improving detection accuracy.

1. The name of the design product: head clamp for cone beam computed tomography equipment. 2. The use of the design product: belongs to the field of medical devices, used on oral cone beam computed tomography (CBCT) equipment, used to prevent the patient's head from shaking when scanning images. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The present disclosure provides a cone beam computed tomography system for proton therapy comprising an x-ray source configured to generate x-rays and positioned to rotate around a patient at a treatment isocenter, a detector assembly positioned opposite the x-ray source and configured to receive x-rays that have passed through the patient, a rotation mechanism configured to rotate the x-ray source and the detector assembly around the patient while maintaining their relative positions, a translation mechanism configured to translate at least one of the x-ray source, the detector assembly, or a patient couch during rotation to implement a wobbled scan orbit, and a scatter rejection grid attached to the detector assembly and focused on the x-ray source to reduce scattered x-rays. The translation mechanism distributes missing projection data across multiple radii and angles, enabling improved reconstruction quality through iterative reconstruction methods.