12 results about "Spiral ct" patented technology

The invention discloses a wooden artwork source digital identity authentication method based on CT scanning. According to the technical scheme, the wooden artwork source digital identity authentication method is characterized by comprising the steps that S1, multi-row spiral CT or industrial micro-focus CT scanning equipment is selected according to the size of an artwork to obtain three-dimensional volume data; s2, performing image reconstruction preprocessing and feature region extraction on the three-dimensional volume data to obtain an artwork feature image; s3, analyzing a macroscopic structure feature, a mesoscopic texture feature, a microscopic detail feature and a feature image set of the to-be-authenticated artwork; s4, setting a unique identity code, and generating a digital identity file of the artwork; s5, obtaining feature parameters and digital fingerprint vectors of the artwork according to the feature image set; s6, inputting the digital fingerprint vector into an artwork authentication model, and outputting an authentication result corresponding to the artwork according to the authentication model; and a digital identity certificate and a block chain evidence storage record are generated according to the authentication result. According to the invention, the safety and reliability of identity authentication of the wooden artwork are improved.

The invention is suitable for the technical field of spiral CT scanning, and provides a stator system capable of achieving spiral CT scanning, the stator system comprises a stator support, a stator and a rotor assembly, the stator is installed on the stator support, one end of the rotor assembly is rotatably installed on the stator support through a bearing, a large belt wheel and a small belt wheel are installed on the stator support, and the large belt wheel and the small belt wheel are rotatably installed on the rotor assembly through a bearing. The small belt wheel is in transmission connection with the large belt wheel through a synchronous belt, the large belt wheel is in transmission connection with one end of the rotor assembly, a sliding ring and a sliding ring cover assembly are installed on one side of the stator support, and a tensioning wheel assembly, a sound insulation cover assembly, a CT rotor plug pin assembly and a motor adapter plate are installed on the stator support. A motor is installed on the motor adapter plate, and the output end of the motor is in transmission connection with the small belt wheel. The operation efficiency and stability of the equipment can be effectively improved, the noise level is reduced, and the abrasion and failure rate of the equipment are reduced, so that the service life of the equipment is prolonged, and the detection accuracy and reliability are improved.

This invention provides a control method for a spiral CT scanner, the method comprising: receiving vital sign data of a scanned object; formulating a first scan plan based on the vital sign data; performing a CT scan on the scanned object according to the first scan plan to obtain first projection data, the first projection data including projection data already acquired under the first scan plan and projection data to be acquired; performing an inspection using the first projection data according to image reconstruction inspection rules; evaluating the inspection results according to specific conditions, if the evaluation results meet the specific conditions, maintaining the first scan plan, if the evaluation results do not meet the specific conditions, generating a second scan plan and continuing to perform a CT scan on the scanned object according to the second scan plan, and obtaining second projection data, wherein the specific conditions are whether the first projection data is sufficient or redundant for image reconstruction; and performing image reconstruction based on the first projection data and / or the second projection data.

The invention provides a multi-modal CT image data fusion three-dimensional reconstruction method for puncture positioning, and the method comprises the steps: constructing a high-dimensional feature space containing an anatomical structure, metabolic activity and time-varying information through the feature coding of spiral CT and multi-phase PET data; modal alignment is realized by using a mutual information-driven dual-constraint registration mechanism, and cognitive fusion of cross-modal features is completed in combination with dynamic weight tensors of patient physiological features, clinical requirements and organ semantics; and finally, through adaptive light field rendering and topology maintenance optimization, a three-dimensional reconstruction model with medical accuracy and clinical guidance is generated, and accurate visual support is provided for puncture surgery.

This invention belongs to the field of digital core spiral CT scanning analysis technology, and relates to a method, device, and storage medium for characterizing coal seam intercalation. The method includes the following steps: acquiring a CT grayscale image of the coal seam; classifying the inorganic minerals in the CT grayscale image; establishing an inorganic mineral classification and identification chart for the coal seam; acquiring the inorganic mineral content of each CT scan cross-section corresponding to the coal seam; calculating the brittleness parameter of each CT scan cross-section; and generating characterization results based on the CT grayscale image, the inorganic mineral content, and the brittleness parameter. The coal seam intercalation characterization method, device, and storage medium provided in this application utilize a coal reservoir mineral content and brittleness parameter evaluation method based on full-diameter CT, achieving for the first time a quantitative evaluation of the inorganic mineral content and brittleness parameter of the entire well section of a coal reservoir at the millimeter level, providing valuable data support for the next step of coalbed methane development engineering fracturing.

The invention relates to a cone beam spiral CT system. The cone-beam spiral CT system comprises: an accelerator configured to send cone-beam rays to an object to be measured; the detector device is configured to receive cone-beam rays penetrating through an object to be detected, the screw pitch of the cone-beam spiral CT system is larger than 1.5, the detector device is a detector array, the detector array comprises a plurality of detectors arranged in an array mode, the detector array comprises a plurality of rows of detectors arranged at intervals in the row direction, and the detector array is configured to receive the cone-beam rays penetrating through the object to be detected. The row direction is the advancing direction of the to-be-detected object. According to the invention, large-pitch configuration is adopted, so that the scanning speed is remarkably improved, and the imaging requirement in a large-flux scene can be met.

The present application relates to a kind of high-energy industrial spiral CT systems, belong to CT scanning technical field, solve the scanning difficult problem of oversized workpiece.The CT system of the present application includes: workpiece conveying mechanism and scanning system;Workpiece conveying mechanism includes: support platform, first linear conveying component, second linear conveying component and driving device;Support platform is slidably installed above first linear conveying component and can be driven displacement by driving device;First linear conveying component and second linear conveying component are respectively arranged at the front and rear of scanning system;Scanning system includes: scanning assembly, rotating slip ring component and support assembly;Scanning assembly is rotatably installed on the support assembly by rotating slip ring component, and scanning assembly can scan the workpiece to be measured when rotating.The present application realizes the scanning of large-size workpiece and does not need workpiece rotation.

The invention discloses a thighbone tackle forming method based on 3D printing, and relates to the technical field of three-dimensional reconstruction. Comprising the steps of data collection, data preprocessing, three-dimensional model construction, parameter measurement, individualized reconstruction, osteotomy guide plate design and intraoperative forming, knee joint skeleton anatomy details are accurately obtained through spiral CT data collection, multi-step image processing and three-dimensional modeling, and the individualized reconstruction of the tackle groove based on patient individual anatomy is achieved. The curvature radius, the width, the depth and the articular surface angle of the reconstructed tackle groove are matched with the height of the patella, the operation accuracy is improved, and the problem that the patella is unstable due to maldevelopment of the tackle groove is solved; the design of the osteotomy guide plate realizes accurate conversion from virtual osteotomy to an actual operation, the binding surface of the osteotomy guide plate is tightly attached to the outer surface of the femur, the osteotomy channel is accurately matched with an osteotomy tool, the operation time is shortened, the design of the fixing holes ensures that the guide plate is stable, the osteotomy deviation risk is reduced, and the operation safety is improved.

The invention discloses a multi-modal score construction method for identifying benign and malignant pulmonary nodules and application of the multi-modal score construction method. The multi-modal score construction method comprises the steps that 1, data are collected, and data sets serve as a training set and a verification set respectively; step 2, preprocessing the collected low-dose spiral CT image; 3, aiming at the preprocessed low-dose spiral CT image, extracting marker features of the pulmonary nodule under imaging; the pulmonary nodule deep learning malignant probability is acquired, and the pulmonary lobe radiomics detection result of the participant is acquired; 4, based on the extracted pulmonary nodule features, constructing a single-mode nodule score, and verifying and evaluating a score identification effect; and step 5, constructing a pulmonary nodule benign and malignant identification multi-mode comprehensive score. According to the method, after the patient completes low-dose spiral CT or provides biological information, the individualized risk score is automatically generated, and the relative risk level in the screening crowd is visually displayed in a risk percentage mode to assist doctors in decision making and grading intervention.

The present application relates to a kind of mobile high-energy industrial spiral CT systems, belong to CT technical field, solve the problem that existing CT equipment is difficult to carry out the scanning of fixed workpiece.The CT system of the present application includes: scanning system and displacement system;Displacement system can drive scanning system displacement;Scanning system includes: scanning system shell, scanning assembly, drive assembly, workpiece support structure and feeding and discharging gate;Workpiece support structure is used to support and position the workpiece to be measured;Scanning assembly is used to emit ray and scan the workpiece to be measured;Drive assembly is used to drive scanning assembly to carry out rotary motion and linear motion relative to the workpiece to be measured;Feeding and discharging gate can be opened or closed, and then the workpiece to be measured can be placed inside workpiece support structure or taken out from workpiece support structure.The present application realizes the synchronous realization of the rotation and displacement of scanning assembly, can carry out real-time scanning to fixed piece, and overcome the limitation of CT machine use site.

The application provides a multi-modal CT image data fusion three-dimensional reconstruction method for puncture positioning, constructs a high-dimensional feature space containing anatomical structure, metabolic activity and time-varying information through characteristic coding of spiral CT and multi-phase PET data; realizes modality alignment by using a mutual information driven double constraint registration mechanism, and completes cognitive level fusion of cross-modal features by combining a dynamic weight tensor of patient physiological characteristics, clinical requirements and organ semantics; and finally generates a three-dimensional reconstruction model with medical accuracy and clinical guidance by adaptive light field rendering and topology preservation optimization, so as to provide precise visualization support for puncture surgery.

The application discloses a spiral CT image reconstruction method based on a neural radiation field, and belongs to the field of computer vision.The method comprises the following steps: determining an original projection image of a scanned object; the original projection image is obtained by a spiral CT device through a fan-beam scanning mode; according to a sampling angle corresponding to the original projection image, the original projection images with the same sampling angle in each cycle of a rotation process are classified and spliced through a rotation direction to obtain spliced projection images; and a spiral CT image is generated by calling an image reconstruction model based on the spliced projection images; wherein the image reconstruction model is constructed and trained based on a neural radiation field.The method reduces the radiation risk of related personnel.