458 results about "Sagittal plane" patented technology

The present invention relates to the technical field of stomatology. Provided is an auxiliary dental implant generation method based on a diffusion model. The method in the present invention comprises: acquiring oral CBCT image data of historical patients, preprocessing the oral CBCT image data of the historical patients to obtain a CBCT image dataset, using the CBCT image dataset to train a multi-task segmentation network, and using the segmentation network to obtain an intraoral tissue segmentation result; using the intraoral tissue segmentation result to train detection networks from the three dimensions of a cross-sectional plane, a coronal plane and a sagittal plane, respectively; using the detection networks to obtain detection results in the three directions of the cross-sectional plane, the coronal plane and the sagittal plane; fusing the detection results in the three directions of the cross-sectional plane, the coronal plane and the sagittal plane, and using a majority voting algorithm to construct a three-dimensional bounding box, so as to acquire an edentulous area; and using the intraoral segmentation result and the edentulous area as prompt information to guide, by means of an iterative process, a network to generate a post-implantation effect. The implantation effect obtained by the present invention is highly accurate, thereby providing a more precise auxiliary tool for stomatology.

The invention relates to an image processing method and a puncture guiding system. The method comprises the following steps: acquiring a medical image sequence image and an ultrasonic sequence image of a target object; performing registration based on the ultrasonic sequence image and the medical image sequence image to obtain a registration transformation matrix and a three-dimensional image after registration fusion; displaying a cross section image in the registered and fused three-dimensional image in a first display area, and projecting a puncture point on the puncture plate on a mapping point of the cross section image and an imaging area of a sagittal plane; responding to rotation operation of the ultrasonic probe, and updating imaging areas of the cross section image, the mapping points and the sagittal plane in the first display area in real time according to the rotation operation; when any target mapping point is located in the imaging area of the sagittal plane in the cross section image, the relative position of the target mapping point located in the imaging area of the sagittal plane in the sagittal plane image is displayed in the second display area. Therefore, the same target mapping point can be displayed in the cross section image and the sagittal plane image at the same time.

The invention relates to the technical field of human body health assessment, in particular to a health assessment method and system based on a 3D human body posture image model. The method comprises the following steps: acquiring human body annular scanning data; extracting a dynamic posture sequence of a vertical position, a forward bending position and a lateral bending position of the human body annular scanning data, and performing phase shift fringe projection on the human body annular scanning data according to the dynamic posture sequence to obtain human body three-dimensional point cloud data; a sagittal plane, a coronal plane and a cross section of the human body three-dimensional point cloud data are analyzed for orthogonal projection, and a human body multi-angle projection image group is generated; and identifying skeleton contour features of the human body multi-angle projection image group so as to establish a dynamic marking system of the anatomical mark points. Through high-precision dynamic acquisition and multi-dimensional space analysis, precision, standardization and individuation of 3D human body posture health assessment are realized, and the accuracy and comprehensiveness of human body posture health assessment are improved.

The invention provides an auxiliary dental implant generation method based on a diffusion model, and relates to the technical field of stomatology, and the method comprises the steps: obtaining historical patient oral cavity CBCT image data, carrying out the preprocessing of the historical patient oral cavity CBCT image data, obtaining a CBCT image data set, training a multi-task segmentation network through the CBCT image data set, and obtaining a CBCT image data set; obtaining an intra-oral tissue segmentation result in the segmentation network; respectively training a detection network from three dimensions of a cross section, a coronal plane and a sagittal plane by using an intraoral tissue segmentation result; obtaining detection results in three directions of a cross section, a coronal plane and a sagittal plane by using a detection network; fusing the detection results in the three directions of the cross section, the coronal plane and the sagittal plane, constructing a three-dimensional bounding box by using a majority voting algorithm, and obtaining an edentulous region; the intraoral segmentation result and the edentulous area serve as prompt information, the network is guided through the iteration process to generate the post-implantation effect, the implantation effect obtained through the method is high in accuracy, and a more accurate auxiliary tool can be provided for stomatology.

The invention discloses a spine three-dimensional evaluation method and system based on RGB images and anatomical constraints, and belongs to the field of medical image analysis. The method comprises the following steps: carrying out preprocessing and anatomical symmetry correction on an upright position back RGB image shot by the intelligent mobile equipment for a single time; extracting regions of interest of shoulder blade and iliac crest mark points by using a lightweight segmentation network; generating an initial depth map through a depth estimation model fusing a vertebra attention mechanism and a multi-constraint loss function; carrying out physiological scale calibration on the initial depth map based on height and weight parameters; a cascade GAN is adopted to eliminate clothes interference and reconstruct a back three-dimensional surface; based on biomechanical characteristics, NURBS parameters are adjusted in a self-adaptive mode to fit a spine three-dimensional curve; and outputting a coronal plane Cobb angle, a trunk rotation angle and a sagittal plane curvature parameter. Through monocular depth estimation and dynamic evaluation of anatomical constraint, the problems of radiation risk, subjective error and clothes interference of a traditional method are solved.

The present disclosure provides an earphone comprising a sound production component and an ear hook. In a wearing state, the ear hook is configured to place the sound production component at a position near an ear canal but not blocking the ear canal. An inner contour of the ear hook's projection on a user's sagittal plane includes a first curve having an extremum point in a first direction. The first direction is perpendicular to a long-axis direction of a projection of the sound production component on the sagittal plane. The extremum point is located behind a projection point of an upper vertex of the ear hook on the sagittal plane, and the upper vertex is a highest point of an inner contour of the ear hook along the user's vertical axis. An inclination angle of the long-axis direction relative to a horizontal direction is within a range of 13°-21°.

The invention relates to the technical field of spine correction instruments, in particular to an automatic spine corrector and a control method thereof. Comprising an upper connecting frame and a lower connecting frame which are arranged on the back side, and a first connecting sleeve is arranged on the upper connecting frame and used for being connected with the corresponding chest section position of the trunk; the lower connecting frame is arranged below the upper connecting frame, a waist support is arranged at the front end of the lower connecting frame, and a second connecting sleeve is arranged corresponding to the lower side of the waist support; the power-assisted connecting piece is connected between the upper connecting frame and the lower connecting frame; the driving device comprises a driver and an inhaul cable, the inhaul cable is connected between the power-assisted connecting piece and a movable part of the driver, and the driver is used for pulling the power-assisted connecting piece in the rear-lower direction through the inhaul cable, so that backward pulling force is generated at the upper connecting frame, and forward pushing force is generated at the waist support; the force measuring sensor is used for detecting the pulling force of the inhaul cable on the power-assisted connecting piece; and the controller is in communication connection with the driver and the force measurement sensor. The spine sagittal plane unbalance can be effectively corrected.

The invention discloses a mandibular neural tube automatic segmentation method based on multi-view guidance, and relates to the technical field of oral medical treatment. Comprising the following steps: collecting original oral cavity CBCT image data, and performing preprocessing; sending the preprocessed image data into a mandible segmentation network, and segmenting a mandible region containing a mandible neural tube; a contrast enhancement technology is adopted for the segmented mandible area; projecting the processed mandible image along three orthogonal tangent planes of a coronal plane, a sagittal plane and a cross section; performing key point detection on the mandibular neural tubes on the three projection planes by using the trained key point detection network to obtain shape information of the mandibular neural tubes; and the features are combined with texture direction features to be input into a three-dimensional CBCT mandibular neural tube segmentation network, and accurate 3D segmentation is carried out. Two-dimensional missing space information is avoided, and mandibular neural tube segmentation is more complete and accurate.

The invention discloses a positioning puncture surgery robot system with a reconfigurable working space, and the system comprises a multi-mode image collection module which is used for obtaining a high-resolution image of a target region of a patient; the three-dimensional anatomical model reconstruction module is used for generating a three-dimensional anatomical model containing a skeleton structure and a soft tissue structure; the target point selection and puncture path generation module is used for automatically recommending puncture target points according to operation types and clinical requirements and automatically generating a plurality of preliminary puncture paths; the multi-plane segmentation and path injection module is used for segmenting the three-dimensional anatomical model from a coronal plane, a sagittal plane and an axial plane and generating slices, and injecting puncture paths into the corresponding slices; by integrating multi-modal image acquisition, three-dimensional anatomical model reconstruction and automatic path planning and optimization setting, the operation efficiency and accuracy are remarkably improved, the operation risk is reduced through real-time data analysis, and a more personalized treatment scheme is provided for a patient.

The invention relates to the technical field of robots, and discloses an electro-hydraulic hybrid driving and driven humanoid robot lower limb and waist assembly which serves as a connection foundation of lower limbs and a robot trunk. The near ends of the thigh assemblies are connected with the waist assembly through hip joints; the near end of the shank assembly is connected with the far end of the thigh assembly through a knee joint; the foot component is connected with the far end of the shank component through an ankle joint; the hip joint is provided with three rotational degrees of freedom, the knee joint is provided with one rotational degree of freedom, and the ankle joint is provided with two rotational degrees of freedom; the rotational degree of freedom of each joint in a sagittal plane is driven by an active hydraulic actuator and a passive hydraulic actuator; the rotational degree of freedom of each joint in a horizontal plane and a coronal plane is driven by a motor joint module; the advantages of electric drive and hydraulic drive are brought into full play, and the problems of high power consumption in the negative work stage, complex traditional hydraulic drive pipelines and the like are solved by adopting an active and passive combined distributed hydraulic drive technology.

The invention discloses a wavelet enhancement cooperative activation method for FES multi-target time sequence regulation and control, and relates to the technical field of biomedical engineering. According to the model, an overlapped sliding window is analyzed through a multi-channel surface electromyographic signal, a time-frequency energy significant feature matrix is constructed by combining an energy ratio, and meanwhile, an inter-muscle co-activation matrix is constructed in the multi-channel electromyographic signal sliding window; constructing a multi-channel high-dimension matrix by using each single-channel time-frequency energy significant feature matrix and the multi-channel inter-muscle co-activation matrix, and performing data dimension reduction on the multi-channel high-dimension matrix to obtain a multi-channel multi-dimension time-frequency energy-inter-muscle co-activation matrix; and a muscle activation time sequence vector is screened by using a self-adaptive threshold logic combination rule, and finally an activation time sequence is applied to an FES experiment. According to the method, the movement of the hand on the sagittal plane is accurately predicted by analyzing the multi-channel surface electromyogram signals and the multi-target muscle co-activation characteristics, functional electrical stimulation FES parameters are dynamically adjusted, and accurate control over the muscle activity stage is achieved.

The invention discloses a method for generating high-quality Laguerre-Gaussian vortex light, which comprises the following steps: based on a V-shaped laser resonant cavity of a concave folded mirror, astigmatism is introduced by utilizing different convergence capacities of the concave folded mirror on a meridian plane and a sagittal plane of a light beam, so that the cylindrical symmetry of the resonant cavity is destroyed, and the high-quality Laguerre-Gaussian vortex light is generated; the influence of the cylindrical symmetry of the laser resonant cavity on the intrinsic mode of the cavity is eliminated, so that the intrinsic mode of the cavity is a Hermite-Gaussian mode, and the generation of an ellipse due-Gaussian mode is inhibited; an off-axis pumping method is adopted, and the laser resonant cavity generates high-order Hermite-Gaussian mode laser; the focusing lens focuses the generated high-order Hermite-Gaussian mode laser, so that the beam waist of the high-order Hermite-Gaussian mode laser is positioned in the center of the astigmatism mode converter; the astigmatism mode converter provides conditions for mode conversion by changing the Gouy phase of the laser mode, and high-quality Laguerre-Gaussian vortex light output is achieved.

The invention relates to the technical field of spine correction instruments, in particular to a spine corrector with a longitudinal force unloading function. The upper connecting frame and the lower connecting frame are arranged on the back side, a first connecting sleeve is arranged on the upper connecting frame, and the first connecting sleeve is connected with the position, corresponding to the chest section, of the trunk; the lower connecting frame is arranged below the upper connecting frame, a waist support is arranged at the front end of the lower connecting frame, and a second connecting sleeve is arranged on the lower connecting frame corresponding to the lower side of the waist support; the power-assisted connecting piece is connected between the upper connecting frame and the lower connecting frame; the inhaul cable is connected to the power-assisted connecting piece, and the inhaul cable is used for pulling the power-assisted connecting piece in the rear-lower direction; a force unloading component is arranged between the upper connecting frame and the power assisting connecting piece and comprises a connecting base and a limiting protruding part which are arranged on the upper connecting frame and the power assisting connecting piece respectively, a sliding cavity is formed in the connecting base, and the limiting protruding part is arranged in the sliding cavity in a sliding mode and is always separated from the end wall, transmitting longitudinal tension, of the sliding cavity. Longitudinal compression force harmful to the spine can be effectively avoided while sagittal plane unbalance is corrected.

An ankle joint replacement prosthesis comprises a tibia prosthesis assembly and a talus prosthesis, the tibia prosthesis assembly comprises a tibia prosthesis body and a cushion block, the tibia prosthesis body and the cushion block are in an arc shape with the middle bent upwards on the sagittal plane, the cushion block is arranged at the bottom of the tibia prosthesis body in a sleeving mode, and the surface of the upper portion of the tibia prosthesis body is a tibia joint face. The surface of the lower portion of the cushion block is a first articular surface, the surface of the upper portion of the talus prosthesis is a second articular surface, the second articular surface is in an arc shape with the middle bent upwards on a sagittal plane, the surface of the lower portion of the talus prosthesis is a talus joint surface, and the first articular surface is matched with the second articular surface. When the prosthesis is implanted, only the articular cartilage and the subchondral bone need to be treated at the far end of the tibia, so that the bone at the far end of the tibia is reserved to the maximum extent, the anatomical integrity of the bone is guaranteed, the stability of the prosthesis is enhanced, the service life is prolonged, and the clinical operation effect is improved.

The invention discloses a spine parameter measurement and spine automatic typing method comprising the following steps: obtaining four spine original images of a to-be-detected target in different directions, preprocessing the spine original images, and sending the preprocessed spine original images into an image neural network to obtain key information in the images; and performing parameter measurement and analysis according to the key information to obtain various parameters. And calculating according to the lateral bending Cobb angle, the segment and the sagittal posterior convex angle to obtain a lateral bending type. And judging the relative position relationship between the sacrum perpendicular bisector CSVL and the vertebral pedicle mask to obtain the corrected type of the lumbar curvature. And judging according to the thoracic vertebra posterior lobe of the sagittal plane to obtain a thoracic vertebra sagittal plane correction type. And combining the lateral bending type, the waist bending correction type parting and the thoracic vertebra sagittal plane correction type to obtain a complete Lenke parting. Through automatic identification and automatic calculation, the popularization rate of spine radiation parameter measurement can be effectively improved without professional requirements and thresholds, and the method has very high clinical practical significance and popularization significance.

The invention provides a knee joint dyskinesia function evaluation method and system. The method comprises the following steps: by collecting lower limb kinematics parameters, plantar pressure distribution data and gait rhythm parameter groups of a subject in a standard gait test, generating a knee joint motion trail map comprising sagittal plane, coronal plane and rotation trail components, dividing a dynamic phase window based on the gait rhythm parameters, calculating a fluctuation feature vector of a sagittal plane track component, performing nonlinear decomposition on a coronal plane and a rotation track component to separate an adduction and abduction motion principal component and a rotation coupling component, constructing a joint stability quantitative index, and performing dynamic space registration on a bilateral knee joint track map to obtain a joint stability quantitative index; and calculating a three-dimensional trajectory similarity weight matrix, and calculating a dynamic symmetry index in combination with the cross-side difference coefficient of the joint stability quantitative index. According to the technical scheme provided by the invention, a scientific basis is provided for personalized rehabilitation treatment.

The utility model provides a multi-curvature ankle joint prosthesis which comprises a tibia prosthesis connected with a tibia, a talus prosthesis connected with a talus and a cushion block with one side connected with the tibia prosthesis, a joint contact surface is arranged on the other side of the cushion block, and a talus contact surface matched with the joint contact surface is arranged on one side of the talus prosthesis. The curvature of the sagittal plane Z in the talus contact face is reduced from front to back, and the instantaneous rotation center of the talus prosthesis on the joint contact face is in an arc shape. According to the multi-curvature ankle joint prosthesis, the talus contact face and the anatomical structure of the human body are high in consistency, the natural form and the motion mode of the ankle joint are accurately restored, the ankle joint prosthesis better conforms to biomechanics and kinematics in the motion process, the motion stability of the human body is improved, local friction stress of the ankle joint prosthesis is smaller, and the ankle joint prosthesis is more stable in motion. And the service life of the ankle joint prosthesis is prolonged, so that the durability of the ankle joint prosthesis is improved.

The invention relates to a three-dimensional lower jawbone image restoration method based on comparative learning prior and mask autoregression. The method comprises the following steps: acquiring a maxillofacial region three-dimensional CT image of a patient; for the image of the mandible of the patient, respectively obtaining coarse repair results on a coronal plane, a sagittal plane and a cross section through a two-dimensional repair model; the two-dimensional repair model and the mask autoregression strategy are adopted, comparison learning loss is added, global sample feature information is obtained by using a pre-trained ViT model, and the lambda model is guided to complete intra-layer repair of global information and local fine-grained information; and fusing the coarse repair results of different layers obtained by the two-dimensional model by adopting a fine repair module based on residual fusion to obtain a three-dimensional repair result. Compared with the prior art, the method has the advantages that the deep learning technology is utilized, a brand new medical image restoration algorithm is constructed, the full-automatic restoration result of the maxillofacial region three-dimensional CT is achieved, and effective assistance is provided for preoperative accurate planning.

The invention relates to the technical field of spine correction instruments, in particular to a spine sagittal plane unbalance corrector. A spine sagittal plane unbalance corrector comprises an upper connecting frame and a lower connecting frame which are arranged on the back side, and a first connecting sleeve is arranged on the upper connecting frame and used for being connected with the position, corresponding to the chest section, of the trunk; the lower connecting frame is arranged below the upper connecting frame, a waist support is arranged at the front end of the lower connecting frame, the front end of the waist support is supported on the back waist, a second connecting sleeve is arranged on the lower connecting frame corresponding to the lower side of the waist support, and the second connecting sleeve is connected to the hip; the power-assisted connecting piece is connected between the upper connecting frame and the lower connecting frame, and the power-assisted connecting piece is hinged to the lower connecting frame; the inhaul cable is connected between the power-assisted connecting piece and the lower connecting frame, and the end, away from the power-assisted connecting piece, of the inhaul cable is connected to the rear side, corresponding to the waist support, of the lower connecting frame. And when the thoracolumbar part is corrected, excessive pelvis retrorotation caused by unbalance of the sagittal plane of the spine can be corrected.

The invention relates to a planning method and system and computer equipment. The method comprises the following steps: performing skeletonization processing on a three-dimensional model of an atlas to obtain skeleton lines; determining a first plane and a second plane of the atlas according to the skeleton line; the first plane is a horizontal plane corresponding to a skeleton line, and the second plane is a sagittal plane of the atlas; and according to the first plane and the second plane, determining a planned path of atlas screw placement. By using the planning method provided by the invention, the automatic planning of the atlas screw placement path can be realized.

Disclosed in the present invention is a lower-limb-powered exoskeleton device for rehabilitation assistance, comprising ankle-joint sagittal-plane driving units, knee-joint sagittal-plane driving units, hip-joint sagittal-plane driving units, a hip-joint horizontal-plane driving unit, a joint driver connecting frame, a lower-limb fixing support, sensors, a controller and a power supply. Antagonistic-drive-type linear driving units are used in the sagittal plane of a hip joint so as to enable the bending and extension movements of the hip joint, and a linear driving unit having the function of self-locking when powered off is used in the horizontal plane of the hip joint so as to enable the turning movements of the exoskeleton; and a linear driving unit in cooperation with a magnetorheological brake is used in the sagittal plane of each knee joint, thereby significantly reducing the power consumption of a knee-joint driver while lowering the control difficulty. The powered exoskeleton device can help patients with an impaired lower-limb motor function to carry out walking rehabilitation training.

Shoulder support systems and methods for treatment of the shoulder, where the ability to maintain some level of arm rotation and abduction is desired to promote positive health outcomes and ability to perform activities of daily living. Systems may comprise a vest and at least one support strap. The vest may be configured to cover an upper portion of a torso, shoulders, and at least a portion of upper arms. Pairs of sagitally mirrored anchor points may be positioned on the body and sleeves of the vest. Support straps may be attached to the anchor points. A path of the support straps may transverse the sagittal plane and spiral around an arm. Inelastic or strongly elastic cables may run a length of the support straps. Tensioning mechanisms may adjust the length of the cables to achieve the desired resistive forces for the support straps.

The invention belongs to the technical field of robots, and provides a hip joint exoskeleton and a walking assistance control method.The hip joint exoskeleton comprises three active driving units, and a hip joint exoskeleton sagittal plane driving unit is used for achieving forward flexion / backward extension of a human hip joint; the hip joint exoskeleton coronal plane driving unit is used for realizing human hip joint adduction / abduction; the hip joint exoskeleton horizontal plane driving unit is used for realizing inward rotation / outward rotation of the hip joint of the human body; the hip joint exoskeleton sagittal plane driving unit, the hip joint exoskeleton coronal plane driving unit and the hip joint exoskeleton horizontal plane driving unit are connected through the remote rotating center mechanism, so that a rotating plane corresponding to the horizontal plane driving unit is aligned with a hip joint rotating center through a virtual axis. The hip joint exoskeleton is compact in structure and saves space. According to the control method, when the user wears the exoskeleton to walk, the exoskeleton can accurately assist the walking of the user without time delay.

The invention discloses a front walking power assisting device which comprises a power module, a waist module and a leg rod module. The power module is horizontally arranged on the lower abdomen of the human body along the central axis parallel to the coronal plane of the human body. The power module can drive the two ends of the power module to rotate relatively, and the rotating plane is perpendicular to the central axis. The waist module comprises an abdomen frame, the abdomen frame comprises a frame center and two frame wings connected with the frame center, and the frame center is arranged on the lower abdomen of the human body; two wings of the frame extend towards two sides to be near the waist of a human body; the number of the leg rod modules is two, the upper ends of the two leg rod modules are rotationally connected with the two ends of the power module based on corresponding leg rod folding and unfolding shafts, and the leg rod folding and unfolding shafts are parallel to the sagittal plane of the human body and perpendicular to the upper ends of the leg rod modules. The invention has the advantages of light weight, small storage volume, low cost, compactness, close fitting and the like.

A patient interface may include a plenum chamber pressurisable to a therapeutic pressure; a seal-forming structure constructed and arranged to form a seal with a region of the patient's face; a positioning and stabilising structure to provide an elastic force to hold the seal-forming structure on the patient's head, the positioning and stabilising structure may include a tie; a vent structure; a decoupling structure configured to provide a fluid connection between the plenum chamber and an air circuit for the flow of air at the therapeutic pressure for breathing by the patient; and a frame having at least one tie attachment structure to receive the tie, wherein the frame is configured to be resiliently movable in any direction having at least one of a component parallel to the patient's sagittal plane, a component parallel to the patient's coronal plane, a component parallel to the patient's Frankfort horizontal plane.

The invention relates to the technical field of medical image analysis and processing, in particular to a lumbar disc herniation MRI image classification method, which comprises the following steps of: collecting MRI image data of the spine of a patient with lumbar disc herniation, and constructing a sagittal plane data set; the method comprises the following steps: identifying a T2WI sequence for lumbar disc herniation diagnosis aiming at an MRI image of a spine of a patient with lumbar disc herniation to be classified, and screening a diagnosis layer in the T2WI sequence; on the basis of a trained optimized YOLOv3 model, performing automatic segmentation and positioning of the intervertebral disc on the diagnosis layer, and determining a geometric center point of the intervertebral disc; and obtaining an intervertebral disc degeneration grading result based on the trained optimized YOLOv4 model, and classifying the lumbar disc herniation MRI image based on the intervertebral disc degeneration grading result. According to the method, the deep learning algorithm and the image processing technology are combined, so that the speed and the accuracy of image analysis processing are improved, and the degenerative change of the intervertebral disc is accurately graded.

Disclosed is an open earphone, comprising a sound production component and an ear hook. The ear hook may include a first portion and a second portion connected in sequence. The first portion may be hung between the auricle of a user and the head of the user, the second portion may extend toward a front outer side of the auricle and connect the sound production component, and the sound production component may be located close to the ear canal but not block the opening of the ear canal; wherein the sound production component and the auricle may have a first projection and a second projection on a sagittal plane, respectively, a centroid of the first projection may have a first distance from a highest point of the second projection in a vertical axis direction, a ratio of the first distance to a height of the second projection in the vertical axis direction may be within a range of 0.25-0.6, the centroid of the first projection may have a second distance from an end point of the second projection in a sagittal axis direction, and a ratio of the second distance to a width of the second projection in the sagittal axis direction may be within a range of 0.4-0.7.

The invention relates to a 3D printed scoliosis orthosis and a design method, and belongs to the technical field of medical instruments, the 3D printed scoliosis orthosis comprises a body, the body is provided with three sets of auxiliary correction ribs, two kinds of auxiliary correction ribs are located on the same side, and the last set of auxiliary correction ribs is located on the other side and located between the two kinds of auxiliary correction ribs. The auxiliary correcting tendon adopts a three-point force system, and the local force pair system and sagittal plane spine balance is achieved. The'three-point force system 'refers to the stress condition of three points on the same plane but not on the same straight line, when the stress direction of one point is opposite to that of the other two points, the three-point force interacts to generate a correction effect according to the acting force, the counter-acting force, the force decomposition law and the lever balance principle, and the correction effect is achieved. During design, through accurate force application position, reasonable force application size and proper force application area selection, the scoliosis condition of a patient can be remarkably improved, and the requirement for surgical intervention is reduced.

The claimed group of inventions relates to a field of anatomical engineering, and it relates to a mechanical finger and an actuator therefor, which may be used in imitators and prostheses of upper limbs. The mechanical finger is a structural element that performs a gripping function, consists of movable phalanxes, elements for modifying their position relative to each other, and a driving rope that is connected to a lead nut that is, in turn, intended to interact with an electromechanical actuator that transmits a force to the mechanical finger. According to the invention, the rope is fixed on the lead nut and divided into two portions which are arranged symmetrically relative to a sagittal plane of the proximal phalanx and laid on the guides. Therewith, cavities are provided in locations of the rope which are configured to receive loops of the rope, and a length of each of them equals to a travel length of the lead nut. The actuator is a power module that is aimed to drive and to control a movement of the mechanical finger. It consists of a motor reducer having a front shaft with a lead screw mounted thereon, the lead screw is configured to be coupled to the lead nut, and an encoder that is configured to enable a connection to the contact board of the artificial wrist, thereby powering the motor reducer and transmitting pulses. The actuator and the mechanical finger are individual modules of the artificial wrist which together form a single module.

The application relates to a three-dimensional facial median sagittal plane construction method based on an intelligent registration algorithm, which has the following steps: (1) constructing a variable graph structure neural network algorithm for registration of a three-dimensional facial data ontology and mirror image point cloud, and the algorithm steps are as follows: 1) constructing feature vectors of key points in the ontology and mirror image point cloud data X and Y; 2) obtaining the corresponding relationship of the key points in the point cloud X and Y based on the feature vectors; and 3) calculating the rotation and translation matrix R and t of the mirror image data through singular value decomposition; (2) constructing a three-dimensional facial median sagittal plane through a principal component analysis algorithm; and the application can realize accurate and efficient construction of a three-dimensional facial median sagittal plane, and provides a new median sagittal plane construction solution for digital diagnosis and treatment in the oral clinic.