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39 results about "Soft tissue deformation" patented technology

ICG fluorescence image and MRCP three-dimensional model registration fusion display method and system

PendingCN121883553AImage analysisCharacter and pattern recognitionSoft tissue deformationFluorescence
The invention relates to the technical field of medical image information processing, discloses an ICG fluorescence image and MRCP three-dimensional model registration fusion display method and system, effectively solves the problems of deep biliary tract structure blurring and form distortion caused by liver tissue scattering effect in intraoperative fluorescence imaging, uses a preoperative model as anatomical prior, and improves the accuracy of the intraoperative fluorescence imaging. A viewpoint correlation optical path depth field is constructed through reverse ray tracing, a spatial variation point spread function is generated accordingly, physical reverse recovery of scattering halo in a fluorescence image is achieved, non-specific background noise such as vascular leakage is effectively inhibited in combination with topological gravitational constraint of a central skeleton, and the detection accuracy is improved. The real pipe diameter and the center line position of the deep bile duct are accurately recovered, non-rigid registration correction is performed on the three-dimensional model based on the recovered high-fidelity image, and projection errors caused by respiratory movement and soft tissue deformation are eliminated.
Owner:WANNAN MEDICAL COLLEGE

Neurosurgery navigation system and method based on light projection

InactiveCN121003494AMechanical/radiation/invasive therapiesDiagnosticsSoft tissue deformationNeurosurgery
The invention relates to the technical field of medicine, in particular to a neurosurgery navigation system and method based on light projection, the system comprises an image acquisition unit, a data processing unit and a projection unit, the data processing unit is integrated with a deformation simulation engine, a first AI module, a second AI module and a third AI module; compared with the prior art that navigation depends on static preoperative images, and guide information distortion is caused by intraoperative tissue displacement, according to the scheme, soft tissue deformation is dynamically compensated by establishing a real-time digital twin model and integrating a physical deformation simulation engine, so that navigation information can continuously and accurately cover a real anatomical position, and the navigation accuracy is improved. The problem of guiding errors is effectively solved, and the reliability and accuracy of an operation are greatly improved.
Owner:SECOND AFFILIATED HOSPITAL OF XIAN MEDICAL UNIV

Infant airway management system and method based on navigation and high-precision dynamic registration

ActiveCN121641346ATracheal tubesImage enhancementSoft tissue deformationSimulation
The invention discloses an infant airway management system and method based on navigation and high-precision dynamic registration, and the method comprises the steps: constructing a personalized airway deformation model through a physical constraint-based few-sample transfer learning network, generating an optimal instrument matching scheme, and providing a semantic weighted tight coupling visual inertial odometer; the confidence coefficient of feature points is dynamically adjusted by segmenting airway anatomy semantics in real time, data are fused under a factor graph optimization framework, and sub-millimeter robust positioning is achieved. Based on the high-precision trajectory, the system introduces a space-time attention fusion network, captures a long-range time sequence dependency relationship between operation micro-actions and physiological parameters, calculates a real-time dynamic risk score, and compensates airway soft tissue deformation in real time through a non-rigid deformation field model. The technical problems that an existing navigation system is prone to being lost in a microcosmic dynamic environment and risk early warning lags behind are effectively solved, and the safety and the success rate of the infant airway management operation are remarkably improved.
Owner:BEIJING CHILDRENS HOSPITAL AFFILIATED TO CAPITAL MEDICAL UNIV

Topological mapping monitoring and correcting method for abnormal scapular humeral rhythm after breast surgery

The invention discloses a topological mapping monitoring and correcting method for abnormal scapular brachial rhythm after breast surgery, and belongs to the field of medical rehabilitation and computer vision. The method comprises the following steps: acquiring a trunk dynamic three-dimensional point cloud and infrared thermal imaging data; constructing a multi-layer collaborative dynamic topology network fusing a skeleton structure, soft tissue deformation and physiological activeness; extracting an intrinsic motion field and comparing the intrinsic motion field with the ideal model to generate deviation measurement; and calculating a dynamic instability index, comparing the dynamic instability index with a threshold value, and triggering optimization energy correction path calculation and instruction output. According to the method, the multi-dimensional topological mapping and dynamics prediction technology is adopted, accurate recognition and feed-forward early warning of motion abnormity under the influence of deep tissue adhesion after the breast surgery can be achieved, rehabilitation of a patient is guided through an energy consumption minimization path, and the accuracy of shoulder joint function remodeling and the individualized treatment effect are improved.
Owner:JIANGSU PROVINCE HOSPITAL (THE FIRST AFFILIATED HOSPITAL OF NANJING MEDICAL UNIVERSITY)

Delivery progress prediction method and device, electronic equipment and storage medium

PendingCN120859428ASensorsUterine pressure measurementSoft tissue deformationEngineering
The embodiment of the invention provides a delivery progress prediction method and device, electronic equipment and a storage medium, and belongs to the technical field of artificial intelligence. The method comprises the following steps: acquiring three-dimensional point cloud data of a pelvis area through a radar sensor; acquiring tissue metabolism state data of a cervical orifice area and acquiring uterine contraction pressure data; obtaining delivery multi-modal data according to the three-dimensional point cloud data, the tissue metabolism state data and the uterine contraction pressure data, performing feature extraction on the delivery multi-modal data to obtain soft tissue deformation features, cervical state features and current uterine contraction features, and performing cross-modal feature fusion to obtain delivery multi-modal features; performing open finger prediction based on the delivery multi-modal features to obtain open finger prediction data; the delivery process is predicted based on the open finger prediction data, the delivery progress is obtained, the delivery process prediction method and device can be applied to business systems needing a large number such as health care, and the delivery process prediction efficiency and precision can be improved.
Owner:CHINA PING AN LIFE INSURANCE CO LTD

Denture occlusal surface three-dimensional modeling optimization method and system based on dynamic pressure calibration

InactiveCN120580385ABiological modelsDesign optimisation/simulationSoft tissue deformationEngineering
The invention discloses a dynamic pressure calibration-based false tooth occlusal surface three-dimensional modeling optimization method and system, and particularly relates to the technical field of false tooth occlusal modeling, and the method comprises the steps: obtaining soft tissue viscoelastic parameters of a patient through ultrasonic elastography and palpation type pressure collection, and carrying out the classification marking; on the basis of viscoelastic parameters and typical pressure time sequence mapping association, a graph neural network fusion time sequence memory unit is trained, and online prediction from dynamic pressure to soft tissue deformation and denture displacement is achieved; performing three-dimensional interpolation and deformation multiplying power correction on the real-time pressure array by utilizing a prediction result, and eliminating soft tissue disturbance through geometric closed-loop feedback iteration; a key contact point cloud is extracted based on corrected equivalent pressure data and predicted displacement, and a high-precision occlusal surface three-dimensional grid is generated by combining weighted registration, reconstruction and local high-density resampling, so that the problem of pressure offset and geometry inconsistency caused by neglecting soft tissue deformation in static modeling is effectively solved.
Owner:KERUI (ZHUHAI) DIGITAL DENTURE TECH CO LTD

Anesthesia puncture visual navigation system combining augmented reality and three-dimensional reconstruction

ActiveCN120827435AOrgan movement/changes detectionSurgical needlesSoft tissue deformationPhysiological movement
The invention relates to an anesthesia puncture visual navigation system combining augmented reality and three-dimensional reconstruction, and belongs to the technical field of anesthesia puncture visual navigation. The anesthesia puncture visual navigation system comprises a physiological movement monitoring unit used for simultaneously collecting respiratory movement cycle data and soft tissue elastic deformation information; a comprehensive motion state data packet is generated by calculating the correlation coefficient of the breathing amplitude and the tissue elasticity modulus change rate, the space deviation caused by breathing motion and soft tissue deformation of a patient to puncture navigation can be effectively compensated, the puncture precision is remarkably improved compared with a traditional static navigation system under the normal breathing state of the patient, and the puncture accuracy is improved. The puncture failure rate and the complication risk are effectively reduced, the problem that precision is further deteriorated due to the fact that correction parameters are still used blindly when registration quality is deteriorated in a traditional system is solved, dependence on personal experience of doctors is reduced, and the problem that the system is completely invalid possibly caused by a single correction mode is solved.
Owner:LUOYANG XINGFEI NEW MATERIALS TECHNOLOGY CO LTD

Dynamic self-adaptive garment pattern generation method and system based on soft tissue deformation and multi-posture human body measurement

PendingCN122056436AGeometric CADDesign optimisation/simulationHuman bodyDeformation modeling
The invention discloses a dynamic self-adaptive garment pattern generation method and system based on soft tissue deformation and multi-posture human body measurement, and belongs to the field of intelligent garment design. The method comprises the steps of multi-posture human body data acquisition, data preprocessing and database construction, soft tissue layering mechanical modeling, dynamic version parameter calculation, version automatic adjustment, cloth simulation verification, iterative optimization and feedback correction. The system comprises a data acquisition module, a human body deformation modeling module, an automatic model optimization module and the like, the modules are connected through a specific communication mode, a layered mechanical model is established by acquiring three-dimensional data and soft tissue deformation data of six typical postures of a human body, and cloth physical simulation and feedback correction are combined, so that the model is optimized. According to the method, automatic optimization of garment cutting pieces, stitches and elastic areas is achieved, the fitness and comfort of the garment in a dynamic posture are ensured, the intelligent and personalized level of garment design is improved, and the method has remarkable practical value and popularization prospects.
Owner:MINJIANG UNIVERSITY

A Soft Tissue Modeling Method Based on Constrained Energy Function and Finite Element Method

This invention discloses a soft tissue modeling method based on constrained energy functions and the finite element method. First, a corresponding constrained energy function is constructed for the specific interaction effects between soft tissue and surgical instruments. Then, the constructed constrained energy function is integrated into the total energy function of the soft tissue. The continuous variational expression of the total energy is discretized into nodal displacement functions. Next, the displacement field is initialized, and the initial solution and iteration direction are calculated based on the gradient and Hessian matrix of the total energy function. By iteratively updating the displacement field and Lagrange multipliers, the optimal solution is gradually approximated. Finally, the convergence condition is checked; if the preset criteria are met, the iteration terminates; otherwise, the gradient and Hessian matrix are updated until the expected solution is reached. This method significantly improves computational efficiency while enhancing the accuracy of soft tissue deformation simulation, making it suitable for real-time simulation and interactive operation in complex surgical scenarios.
Owner:NANJING TECH UNIV +1

A cervical health monitoring method and system

The application discloses a cervical vertebra health monitoring method and system, and relates to the technical field of health monitoring.The method comprises the following steps: S1: scanning the cervical midline through a flexible tactile array, and positioning the spinous process vertex according to pressure peak feedback; S2: based on the spinous process vertex, performing multimodal sensor collaborative verification; S3: based on the multimodal sensor collaborative verification, synchronously triggering a displacement measurement unit to record the three-dimensional space coordinates of the probe; and S4: based on the collected three-dimensional space coordinates, fitting a cervical curve, and calculating the radius of curvature and the cervical lordosis angle.Combining tactile array pressure distribution analysis and IMU attitude correction, the multimodal sensor collaborative verification reduces errors caused by a single sensing mode, and improves the reliability of monitoring.By adopting a topology optimization algorithm and combining related formulas, soft tissue deformation and operation errors are compensated, the output dynamic bending data is more accurate, and the reliability of the monitoring result is improved.
Owner:INNER MONGOLIA MEDICAL UNIV

Robot soft tissue multi-point contact shape control method and system based on vision

PendingCN120918784AComputer-aided planning/modellingSurgical robotsSoft tissue deformationVision based
The invention belongs to the technical field of robot control, and particularly discloses a robot soft tissue multi-point contact shape control method and system based on vision. Comprising the steps that soft tissue is discretized into a grid formed by n nodes, e feature points on the surface of the soft tissue are selected, and control variables are extracted from feature point position vectors according to task features; a plurality of candidate contact points are selected from nodes on the surface of the soft tissue, a contact point combination with the maximum affordability value is obtained based on a differentiable soft tissue deformation model according to the variable quantity of feature points when all possible unit actions are applied to the multiple contact points, and the combined contact point serves as the optimal contact point; and according to the optimal contact point, adopting an MPC framework to carry out closed-loop shape control so as to solve an optimal action sequence of the robot. According to the method, the optimal multi-point contact scheme can be automatically and quickly evaluated and selected according to specific task requirements, and the real-time, efficient and stable control process is realized.
Owner:HUAZHONG UNIV OF SCI & TECH

Hip joint surgery robot based on three-dimensional scanning and image processing and its rapid and accurate registration method

The present invention discloses a hip joint surgical robot based on three-dimensional scanning and image processing and a fast and accurate alignment method thereof, comprising a three-dimensional scanner, which is integratedly installed at the end of the hip joint surgical robot and is used to perform three-dimensional contour scanning of the inside of the acetabulum to generate three-dimensional image data; a central processing unit, which is tightly coupled with the three-dimensional scanner and is used to receive and analyze and process the three-dimensional image data in real time; an image processing module, which is configured to pre-process the three-dimensional image data obtained by the scan, identify and extract the bone structure, separate the bone structure contour in the acetabulum, and obtain bone structure information; the present invention can accurately distinguish between orthopedic flesh and soft tissue through the image processing module, eliminate the influence of soft tissue deformation on alignment accuracy, and achieve more accurate surgical instrument positioning and implant placement. The technical means of the present invention can not only improve the accuracy of surgical operations, but also reduce operation time, reduce the workload of doctors, and improve surgical safety.
Owner:HANGZHOU SANTAN MEDICAL TECH

Three-dimensional model manufacturing method based on additive printing

The invention discloses a three-dimensional model manufacturing method based on additive printing. The three-dimensional model manufacturing method comprises the steps that standard model data and manufacturing demand data are acquired; performing biomechanical simulation optimization on the standard model data based on the manufacturing demand data to generate optimized data of the soft tissue deformation rule of the human body under the target posture; based on the optimization data, lattice filling design is conducted on the standard model data, an internal supporting structure with gradient density distribution is generated, and target model data is obtained; performing multi-material 3D printing slicing processing on the target model data to plan printing strategies corresponding to different body parts in the target model data; and based on the printing strategy, the multi-material 3D printing equipment is driven to print a plurality of body part models corresponding to the target model data, and the body part models are used for being assembled to form a three-dimensional model finished product. Parting line residues and flashes existing in a traditional process are eliminated, and structural stability and light weight are both considered.
Owner:HUIZHOU DEWEI HUMAN MODEL MANUFACTURING CO LTD

Digital human mouth shape prediction system and method based on variational auto-encoder in smart agriculture

ActiveCN121236246AClimate change adaptationSemantic analysisPattern recognitionSoft tissue deformation
The invention provides a digital human mouth shape prediction system and method based on a variational auto-encoder in smart agriculture, and relates to the technical field of artificial intelligence, and the method comprises the steps: receiving a voice signal of a smart agriculture scene, extracting multi-dimensional voice features, and fusing the multi-dimensional voice features to generate voice representation; inputting the voice representation into a model, and decoding the voice representation into a mouth shape key point sequence; performing semantic enhancement on the mouth shape key point sequence by combining agricultural proper nouns in the input voice and a preset mouth shape template, and simultaneously inhibiting mouth shape jitter and abnormal frames; and mapping the enhanced mouth shape key point sequence to a three-dimensional digital human face model, converting the enhanced mouth shape key point sequence into face soft tissue deformation data in combination with a face parameter of a target user, calculating a skeleton node position and a rotation parameter according to a preset corresponding relationship between the mouth shape and the skeleton, and generating a digital human mouth shape animation synchronized with the input voice through combined rendering. The stable and accurate voice synchronous digital human mouth shape can be generated in an intelligent agricultural scene.
Owner:XIAODUO INTELLIGENT TECH (BEIJING) CO LTD

Operation scene real-time dynamic reconstruction method and system based on three-dimensional Gaussian sputtering

PendingCN121962396AGet rid of strong dependenciesAvoid invalid calculationsImage analysisCharacter and pattern recognitionFeature vectorImaging processing
The invention relates to the technical field of image processing, and discloses an operation scene real-time dynamic reconstruction method and system based on three-dimensional Gaussian sputtering. The method comprises the following steps: extracting spatial-temporal characteristics of a soft tissue deformation Gaussian subset through a HexPlane spatial-temporal encoder; fusing the decoded feature vectors to generate a soft tissue deformation parameter set; a deformation field Jacobian matrix of Gaussian elements in the soft tissue deformation Gaussian subset is calculated, a local volume strain rate is obtained through determinant operation, when the strain rate exceeds a preset threshold value, self-adaptive densification operation is executed, and new Gaussian elements inherit parent Gaussian element deformation parameters and are updated to a corresponding set; and combining the updated parameters to carry out probabilistic boundary allocation and transmissivity perception rendering to obtain a reconstruction result. The accuracy, the physical authenticity and the stability of real-time dynamic reconstruction of the operation scene are improved.
Owner:YUNNAN NORMAL UNIV

Real-time puncture guidance evaluation system based on soft tissue deformation field

ActiveCN116831730BImage enhancementImage analysisPoint cloudSoft tissue deformation
The application discloses a real-time puncture guiding evaluation system based on soft tissue deformation field, which comprises a registration system for registering CT images and real-time ultrasonic images in operation and forming a point cloud graph through interpolation point supplementing, a deformation field determination system for determining a soft tissue deformation field, a guiding line simulation system for forming a new preoperative planning puncture guiding line in combination with the soft tissue deformation field and the registration system according to a real puncture guiding line of preoperative planning, and a comparison system for comparing the deviation of the new preoperative planning line from the real puncture guiding line with a set deviation threshold value. The application can automatically judge whether a preoperative puncture path is feasible, improves the efficiency of operation, converts the preoperative planning path to a real-time intraoperative scene, facilitates the operation of doctors, accurately registers local soft tissue deformation and reduces the operation burden of doctors.
Owner:WUXI AMIT CO LTD

A soft tissue deformation simulation method and device based on a cellular neural network

The application belongs to the technical field of soft tissue deformation simulation, and particularly relates to a soft tissue deformation simulation method and device based on a cell neural network. The method comprises the following steps: constructing a three-dimensional cell neural network model; applying an external force to the three-dimensional cell neural network model, and calculating a cell current of a cell in the three-dimensional cell neural network model according to the applied external force; calculating a state voltage of the cell according to the cell current; calculating a displacement of the cell according to the state voltage; and performing deformation simulation on the three-dimensional cell neural network model according to the displacement of the cell. The application has good generalization, and can realize fast modeling while maintaining simulation real-time performance and simulation effect.
Owner:NANJING UNIV OF INFORMATION SCI & TECH

Cervical vertebra health monitoring method and system

The invention discloses a cervical vertebra health monitoring method and system, and relates to the technical field of health monitoring, and the method comprises the following steps: S1, scanning a neck center line through a flexible touch array, and positioning a spinous process vertex according to the pressure peak feedback; s2, carrying out multi-modal sensing cooperative verification based on the vertex of the spinous process; s3, synchronously triggering a displacement measurement unit to record three-dimensional space coordinates of the probe based on multi-modal sensing cooperative verification; and S4, fitting a cervical vertebra curve based on the acquired three-dimensional space coordinates, and calculating the curvature radius and the anterior lobe of the cervical vertebra. The multi-mode sensing cooperative verification is carried out by combining tactile array pressure distribution analysis and IMU attitude correction, so that errors caused by a single sensing mode are reduced, and the monitoring reliability is improved. And soft tissue deformation and operation errors are compensated by adopting a topological optimization algorithm in combination with related formulas, so that the output dynamic curvature data is more accurate, and the credibility of a monitoring result is improved.
Owner:INNER MONGOLIA MEDICAL UNIV

A digital human mouth shape prediction system and method based on a variational autoencoder in smart agriculture

ActiveCN121236246BClimate change adaptationSemantic analysisPattern recognitionSoft tissue deformation
The application provides a digital human mouth shape prediction system and method based on a variational autoencoder in smart agriculture, and relates to the technical field of artificial intelligence. The application receives a voice signal of a smart agriculture scene, extracts multi-dimensional voice features and fuses to generate a voice representation. The voice representation is input into a model and decoded into a mouth shape key point sequence. The agricultural specific terms in the input voice are combined with a preset mouth shape template to perform semantic enhancement on the mouth shape key point sequence, while suppressing mouth shape shaking and abnormal frames. The enhanced mouth shape key point sequence is mapped to a three-dimensional digital human face model, combined with face parameters of a target user to convert into face soft tissue deformation data, and then the preset corresponding relationship between the mouth shape and the skeleton is used to calculate the position and rotation parameters of the skeleton nodes. After combination and rendering, a digital human mouth shape animation synchronized with the input voice is generated, which can generate stable and accurate voice synchronized digital human mouth shapes in a smart agriculture scene.
Owner:XIAODUO INTELLIGENT TECH (BEIJING) CO LTD

Infant airway management system and method based on navigation and high precision dynamic registration

ActiveCN121641346BTracheal tubesImage enhancementSoft tissue deformationSimulation
The application discloses a navigation and high-precision dynamic registration-based infant airway management system and method, wherein a physical constraint-based few-sample transfer learning network is utilized to construct a personalized airway deformation model and generate an optimal instrument matching scheme, a semantic weighted tight coupling visual inertial odometer is proposed, feature point confidence is dynamically adjusted in real time through real-time segmentation of airway anatomical semantics, and data is fused under a factor graph optimization framework to realize sub-millimeter level robust positioning. Based on the high-precision trajectory, a space-time attention fusion network is introduced into the system to capture long-range time sequence dependency between operation micro-motions and physiological parameters, calculate real-time dynamic risk scores, and compensate airway soft tissue deformation in real time through a non-rigid deformation field model. The application effectively solves the technical problems that existing navigation systems are prone to be lost in a micro dynamic environment and risk early warning is lagged, and significantly improves the safety and success rate of infant airway management surgery.
Owner:BEIJING CHILDRENS HOSPITAL AFFILIATED TO CAPITAL MEDICAL UNIV

Anesthesia puncture visualization navigation system combining augmented reality and three-dimensional reconstruction

The anesthesia puncture visual navigation system combining augmented reality with three-dimensional reconstruction belongs to the technical field of anesthesia puncture visual navigation, and comprises a physiological motion monitoring unit, which is used for simultaneously collecting respiratory motion cycle data and soft tissue elastic deformation information, and generating a comprehensive motion state data packet by calculating the correlation coefficient of the respiratory amplitude and the tissue elastic modulus change rate, so that the spatial deviation caused by the respiratory motion and the soft tissue deformation of the patient to the puncture navigation can be effectively compensated, the puncture precision is significantly improved compared with the traditional static navigation system under the normal respiratory state of the patient, the puncture failure rate and the complication risk are effectively reduced, the problem of further precision deterioration caused by the blind application of correction parameters of the traditional system when the registration quality deteriorates is avoided, the dependence on the personal experience of the doctor is reduced, and the problem of complete system failure caused by a single correction mode is avoided.
Owner:LUOYANG XINGFEI NEW MATERIALS TECHNOLOGY CO LTD

Surgical data dynamic registration method and system based on physical simulation and multi-modal constraint

PendingCN122156267AImage analysisBiological modelsSoft tissue deformationSurface point
The application provides a surgery data dynamic registration method and system based on physical simulation and multi-modal constraint, and the method comprises the following steps: reconstructing a three-dimensional model of a target organ based on preoperative images and labeling feature points; predicting intraoperative deformation through physical simulation to obtain a prediction model; collecting surface point clouds at the beginning of surgery for rigid registration; constructing multi-modal constraint by fusing electromagnetic positioning and visual data in real time during surgery; driving model non-rigid deformation by using position dynamics method to realize dynamic registration. The application can compensate soft tissue deformation with high precision and physical reasonableness, has real-time response capability, does not need to implant markers, is suitable for various soft tissue surgery scenes, and improves the accuracy and safety of surgery navigation.
Owner:HUA PING XIANGSHENG (SHANGHAI) MEDICAL TECH CO LTD

Radiotherapy position verification data registration method and device, equipment and storage medium

ActiveCN120823250BMechanical/radiation/invasive therapiesImage analysisDICOMSoft tissue deformation
The application discloses a radiotherapy position verification data registration method, device, equipment and storage medium, relates to the radiotherapy technical field, and the method reduces the modal difference between CBCT and CT images through CycleGAN modal conversion and organ-specific gray standardization; multi-level features are extracted from the standardized data by using a 3D-ResNet-34-FPN architecture, and a deformation field accurately reflecting local deformation is generated in combination with a TPS-Net, so that the registration accuracy is improved, and nonlinear changes such as soft tissue deformation and organ displacement can be effectively captured; finally, global affine transformation parameters are robustly extracted through 3D-CNN displacement field normalization and RANSAC-SVD decomposition, and are packaged into a DICOM-RT standard protocol and directly transmitted to a radiotherapy device. Not only is the traditional manual operation process automated, but also the work burden and subjective errors of medical staff are reduced, and the reliability and repeatability of the registration result are improved.
Owner:SICHUAN CANCER HOSPITAL

High-precision guide for removable denture implant placement

ActiveCN224269476UDental implantsTrauma surgeryNeodymium magnet
This utility model relates to the field of dental implant technology, and in particular to a high-precision guide plate for removable dental implant implantation, comprising a guide plate body, a positioning component, and an opening component; the upper end of the guide plate body is equipped with an opening component for preventing excessive drilling without repeated measurements, and the lower end of the guide plate body is equipped with a positioning component for rapid adsorption and alignment, preventing displacement of traditional guide plates due to soft tissue deformation. The positioning component includes patches, and two sets of patches are symmetrically arranged at the lower end of the guide plate body for pre-attaching to the patient's mouth. Multiple sets of neodymium magnets for use in patients with insufficient bone content or who fear invasive surgery are sequentially installed from left to right on the upper surface of the patches. A metal ring magnetically connected to the neodymium magnets is provided at the center of the lower surface of the guide plate body. This utility model provides a non-invasive fixation method by utilizing neodymium magnets, reducing the patient's fear and physical burden, and is also applicable to more types of cases.
Owner:SPARK WANFANG DENTAL TECH (BEIJING) CO LTD

Automatic positioning method of ultrasonic probe based on visual recognition

This invention relates to the field of medical device automation technology, and in particular to an automatic ultrasound probe positioning method based on visual recognition. The method includes: acquiring macroscopic visual information containing a target body surface region; identifying at least one anatomical semantic region corresponding to the target body surface region based on the macroscopic visual information; controlling a robotic arm to move the ultrasound probe to an initial positioning position determined based on the anatomical semantic region; acquiring microscopic visual information of the contact area between the ultrasound probe and the body surface; extracting visual features reflecting the probe-body surface contact state based on the microscopic visual information; and generating control commands based on the difference between the visual features and the preset target state, and driving the robotic arm to adjust the ultrasound probe's pose. This invention employs a two-layer architecture combining macroscopic semantic coarse positioning and contact visual servo fine positioning. It does not rely on complex pre-calibration, can adapt to individual differences and soft tissue deformation, and can achieve adaptive adjustment after contact, thus achieving rapid, robust, and adaptive initial probe positioning.
Owner:JIANGSHAN PEOPLES HOSPITAL (JIANGSHAN PEOPLES HOSPITAL MEDICAL COMMUNITY JIANGSHAN OCCUPATIONAL DISEASE PREVENTION & CONTROL HOSPITAL)

A soft tissue deformation simulation method, device, storage medium and equipment

This invention discloses a method, apparatus, storage medium, and device for simulating soft tissue deformation, belonging to the field of soft tissue deformation simulation technology. The method includes: firstly, performing positional correction on the surface vertices to be corrected in the initial 3D model based on geometric information to obtain a corrected 3D model; when the corrected 3D model undergoes deformation, calculating the Jacobian determinant of the volume element, and accordingly calculating the additional potential energy term and regularization force, mapping the regularization force to the equivalent internal force acting on each vertex of the volume element; finally, updating the corrected 3D model based on the equivalent internal force to obtain the final 3D model after deformation. This invention improves the propagation of boundary conditions and displacement fields by introducing positional correction based on geometric information, and introduces a volume constraint mechanism through the design of the additional potential energy term and regularization force to suppress the stability of the volume element deformation process, thereby achieving the synergy between geometric representation and numerical stability in the soft tissue deformation simulation process.
Owner:NANJING UNIV OF INFORMATION SCI & TECH

Training method, soft tissue deformation estimation method, device, equipment and storage medium

ActiveCN117218074BImage analysisNeural architecturesPoint cloudSoft tissue deformation
The application provides a training method, a soft tissue deformation estimation method, a device, equipment and a storage medium. The training method comprises: obtaining a training sample set, different samples in the training sample set comprising point clouds at different time points and velocity vectors of three-dimensional points in the point clouds; wherein, any sample is obtained based on depth estimation and optical flow estimation of four soft tissue images collected from two different directions at adjacent time points; and a preset neural network model is self-supervised trained by using the samples in the training sample set, to obtain a soft tissue deformation estimation model. In the embodiment, the soft tissue deformation estimation model aggregates semantic information and motion flow information, and improves the accuracy of soft tissue deformation estimation.
Owner:CORNERSTONE TECH (SHENZHEN) LTD

Robot surgical navigation system and method based on soft tissue deformation model real-time registration

The invention provides a robot surgical navigation system and method based on soft tissue deformation model real-time registration, and relates to the technical field of medical robots, the system comprises an imaging device, a display device and a control device; the control device comprises a model management module used for acquiring a pre-constructed three-dimensional soft tissue deformation model associated with a target tissue; the feature extraction module is used for processing the real-time image and extracting surface contour features and deformation mechanical correlation features of the target tissue; the real-time registration module is used for performing real-time registration on the target tissue and the three-dimensional soft tissue deformation model; and the navigation generation module is used for fusing the registered three-dimensional soft tissue deformation model with a real-time image. According to the method, real deformation of the tissue in the operation can be adapted in real time through deformation driving of the three-dimensional soft tissue deformation model, high-precision registration of the three-dimensional soft tissue deformation model and the target tissue is achieved, and the registration relation can be kept stable and continuous when the tissue state or the imaging view changes.
Owner:SHANDONG WEIGAO SURGICAL ROBOT CO LTD

Craniomaxillofacial positioning device for orthodontic imaging

The utility model discloses a cranio-maxillofacial positioning device for orthodontic imaging. The cranio-maxillofacial positioning device comprises a bottom plate; the two first vertical rods are arranged on the bottom plate in a spaced mode through a reciprocating motion mechanism, so that the two first vertical rods can move oppositely or away from each other; the lug fixing piece is connected with the first vertical rod through a rotating pair; the second vertical rod is arranged on the bottom plate; the face fixing assembly comprises a nose fixing piece and a forehead fixing piece which are connected with the second vertical rods through a telescopic mechanism, so that the nose fixing piece and the forehead fixing piece are located on the perpendicular bisector of the connecting line of the two first vertical rods and can move along the perpendicular bisector. According to the cranio-maxillofacial positioning device for orthodontic imaging, the head is fixed through the nose, the forehead and the ears of a patient, so that facial soft tissue deformation in the process of fixing the head of the patient is avoided, the CT imaging effect is guaranteed, and meanwhile the use requirements of people with different facial sizes can be met.
Owner:THE CENTRAL HOSPITAL OF WUHAN (WUHAN NO 2 HOSPITAL WUHAN CANCER RESEARCH INSTITUTE)

Radiotherapy body position verification data registration method and device, equipment and storage medium

ActiveCN120823250AImage enhancementMechanical/radiation/invasive therapiesDICOMSoft tissue deformation
The invention discloses a radiotherapy body position verification data registration method, device and equipment and a storage medium, and relates to the technical field of radiotherapy, and the method reduces the modal difference between CBCT and CT images through CycleGAN modal transformation and organ specificity gray scale standardization; a 3D-ResNet-34-FPN architecture is utilized to extract multi-level features from standardized data, and TPS-Net is combined to generate a deformation field which accurately reflects local deformation, so that the registration precision is improved, and nonlinear changes such as soft tissue deformation and organ displacement can be effectively captured; and finally, through 3D-CNN displacement field normalization and RANSAC-SVD decomposition, stably extracting global affine transformation parameters, packaging the global affine transformation parameters into a DICOM-RT standard protocol, and directly transmitting the DICOM-RT standard protocol to radiotherapy equipment. A traditional manual operation process is automated, the workload and subjective errors of medical staff are reduced, and the reliability and repeatability of a registration result are improved.
Owner:SICHUAN CANCER HOSPITAL