291 results about "Bone model" patented technology

Disclosed herein is a method of creating a customized arthroplasty jig. The method may include: generating two-dimensional MRI images of a patient's joint area to undergo arthroplasty; electronically orienting the two dimensional MRI image slices to account for the patient's joint area being randomly physically oriented in a scanning area of a MRI machine; generating a three-dimensional bone image of at least a portion of a bone of the patient's joint area from the generated two-dimensional MRI images; using the three-dimensional bone image to generate data pertaining to the customized arthroplasty jig, wherein the data includes bone surface information; providing the data to at least one manufacturing device; and employing the bone surface information to cause the at least one manufacturing device to create a surface on the arthroplasty jig configured to matingly receive a surface of the bone.

A method of manufacturing an arthroplasty jig is disclosed herein. The method may include the following: generate a bone model, wherein the bone model includes a three dimensional computer model of at least a portion of a joint surface of a bone of a patient joint to undergo an arthroplasty procedure; generate an implant model, wherein the implant model includes a three dimensional computer model of at least a portion of a joint surface of an arthroplasty implant to be used in the arthroplasty procedure; assess a characteristic associated with the patient joint; generate a modified joint surface of the implant model by modifying at least a portion of a joint surface of the implant model according to the characteristic; and shape match the modified joint surface of the implant model and a corresponding joint surface of the bone model.

A method for diagnosing a joint condition includes in one embodiment: creating a 3d model of the patient specific bone; registering the patient's bone with the bone model; tracking the motion of the patient specific bone through a range of motion; selecting a database including empirical mathematical descriptions of the motion of a plurality actual bones through ranges of motion; and comparing the motion of the patient specific bone to the database.

A method of preparing for a surgical procedure includes creating a three-dimensional bone model of a subject bone of a patient. At least a portion of the bone model is compared to at least one three-dimensional reference anatomic model. At least one structural difference between the bone model and the at least one reference anatomic model is identified. At least one desired subject bone structural change is specified to produce a modified bone model responsive to the step of identifying at least one structural difference between the bone model and the at least one reference anatomic model. An apparatus for preparing for a surgical procedure is also provided.

A modeling method for use in surgical navigation is provided. The method acquires a finite number of pre-defined points from a patient's bone and registers the points with a surgical navigation system. The navigation system generates and displays a three-dimensional image of a warped bone model that is manipulatable and accurate in at least the locations of the points taken and can be used to calculate the locations of bone cuts, implant positions and sizes, as well as display all of this information on the three-dimensional warped model.

The invention provides a gas pool prediction method and system of a carbonate reservoir based on pore structure characteristics. The method comprises the following steps: collecting a rock sample of a target reservoir section of the carbonate reservoir; authenticating geological thin sheets of the rock sample so as to obtain rock basic parameters comprising the rock constituents, the pore shape, the surface porosity and the sedimentary phase belt; carrying out pore permeation measurement on the rock sample so as to obtain pore permeation basic parameters comprising the porosity, the permeation rate and the density; constructing a rock bare-bone model according to the rock basic parameters, the pore permeation basic parameters and a differential equivalent medium model; carrying out fluid replacement on the rock bare-bone model so as to generate a rock physical plate; acquiring prestack seismic inversion data of the carbonate reservoir; intersecting the prestack seismic inversion data and the rock physical plate, thereby obtaining the prediction results of the porosity and the gas saturation of the carbonate reservoir. The accurate quantitative gas pool prediction is realized.

A computer assisted surgical system for guiding bone cutting operations of an arthroplasty surgery is provided. The computer assisted surgical system includes a cutting guide having a guiding surface for mounting to a bone and a computer. The computer is in communication with the cutting guide and configured to generate a bone model of the first bone without the use of pre-operative bone images, determine a position of an implant model having a bone interface surface on the bone model, determine a position of the cutting guide on the first bone based on the determined position of the implant model on the bone model, and position the guiding surface of the cutting guide to one of a plurality of predetermined cut configurations relative to the bone interface surface.

A patient specific system for joint replacement surgery that includes a custom cutting guide having an inner surface shaped to match the anatomy of a surface of a patient's joint to be resected. The custom cutting guide is designed for use with a corresponding prosthesis. A slot and guide holes are formed in the custom cutting guide corresponding to features protruding outwardly from a positive physical bone model. The slot guides a tool during resection of the femur to produce a first resected surface on the femur for mounting the prosthesis. The guide is formed from the positive physical model by applying a polymeric composition to the outer surface of the positive physical model including the features corresponding to the slot and guide holes of the custom cutting guide.

The present invention provides a method and a system for treating a bone. The method includes obtaining a bone model representing a bone which is a subject of treatment; obtaining a target bone model to which treatment aims; determining a treatment process (e.g., a necessary assisting member) which is to be performed on the bone based on the bone model and the target bone model; and performing a surgical operation using the determined treatment process. The present invention provides a computer program for performing such a method.

The invention discloses a hand posture estimation method based on depth information and a calibration method. The method comprises the steps that at the step S1, hand depth data is acquired, and a hand area is partitioned from the hand depth data; at the step S2, a palm posture is detected according to the hand area; at the step S3, positions of each articulation point of the hand are computed in combination with the palm posture and a hand standard bone model; at the step S4, projection characteristics of each articulation point of the hand are computed; and at the step S5, finger posture calibration is carried out according to the projection characteristics of each articulation point of the hand. The method disclosed by the invention is characterized in that the depth data is taken as the basis; the hand area is partitioned; the palm posture is computed; and the finger posture is estimated according to depth images through the posture calibration. The method is simple and practical.

The invention discloses a method of making a partial-anodontia tooth implantation surgical guide plate, which comprises the following steps of: (1) acquiring CT data; (2) reconstructing a three-dimensional model of a skeleton; (3) designing an implantation scheme according to biomechanics and skeleton conditions of a patient; (4) designing an analog column for determining an implantation nest according to a position of an implant; (5) subtracting the analog column of the implant from the three-dimensional model of the skeleton by using Boolean subtraction to obtain a preliminary position of the implantation nest; (6) using a light-cured resin to form a skeleton model with a preliminary implantation nest through a rapid forming method; (7) adjusting the skeleton model with the preliminary implantation nest on the skeleton model; (8) inserting an analog implant into the implantation nest of the skeleton model; (9) making a gypsum model inside the oral cavity of the patient; (10) obtaining an analog soft tissue of an edentulous part; (11) repairing false teeth; and (12) making the surgical guide plate. The invention can be reasonably adjusted by an implantation doctor, and has accurate positioning and good practicability.

The invention discloses a 3D printing manufacturing method for a tantalum-coated hierarchical pore polyether-ether-ketone artificial bone scaffold. The method comprises the steps of scanning bone tissues of a human injured part through CT (computed tomography) to ensure that the tissue structure of symmetrical parts can be scanned at the bone tissues of the deficient part, acquiring injured bone image data, importing the data into Mimics software, and establishing a three-dimensional bone model of a human specified part; controlling the software through a 3D printing system to generate a motion locus code; printing a polyether-ether-ketone artificial bone scaffold by using the 3D printing system till the manufacturing process of the whole artificial bone scaffold is completed, putting the dried artificial bone scaffold into the cavity of a sputtering chamber of a magnetron sputtering instrument, bonding the artificial bone scaffold to an objective table by using silver colloid, and plating a tantalum coating on the artificial bone scaffold by adopting a magnetron sputtering technology; discharging gas from the sputtering chamber after the tantalum coating is plated, taking the artificial bone scaffold out, and disinfecting the tantalum-coated hierarchical pore polyether-ether-ketone scaffold to complete all the steps. The artificial bone scaffold is manufactured through 3D printing, so that the method disclosed by the invention has the advantage that the manufactured scaffold is harmless to the human body.

A method and system of computer assistance to the preparation of the reduction of a fracture such that a patient's bony fragments areseparated into first and second bone segments, with in bone segments being symmetrical to a third bone element The method includes the steps of determining a first representation or bone model of the surface of the first bone segment, a second representation, at an initial position, of the second segment, and a third representation of the third bone element; determining by symmetry a fourth representation of the first and second bone segments of the fractured bone in the absence of a fracture, the fourth representation being matched with the first representation; matching the second representation with the fourth representation at a final position; and providing, by an interface element information representative of the difference between the initial position and the final position.

The present invention discloses one kind of human body orthopedic navigation system. The system has one computer with display and input terminal as the core, one CT or MR tomographic scanner connected to the I/O port of the computer, one C-arm or G-arm X ray unit, and one spatial servo location controller. The 2D images taken with the C-arm or G-arm X ray unit is first used in establishing virtual stereo operation scene, the 3D bone model established with CT or MR tomographic scanner before operation is then set into the established virtual stereo scene for registration to obtain position mapping relation between the 3D bone model and the 2D images, and the spatial servo location controller is finally computer controlled for orthopedic navigation. The system of the present invention has saving in apparatus investment and no strict requirement in the electromagnetic interference resisting capacity of the operation room.

The invention provides a realizing method of a virtual fitting room. The method comprises the following steps: a three-dimensional scene is built, and the position allocation of three-dimensional virtual clothes model in the three-dimensional scene is finished; when the situation that at least one person enters the three-dimensional scene is detected, bone streaming data information is acquired, a virtual person bone model is built in the three-dimensional scene, and a three-dimensional virtual person model is loaded in according to the virtual person bone model; the three-dimensional virtual clothes model is chosen to match with the loaded three-dimensional virtual person model; the clothes vertex of the chosen three-dimensional virtual clothes model is extracted, and the physical expression effect of the chosen three-dimensional virtual clothes model is simulated in the three-dimensional scene according to the stress of the clothes vertex. The invention further provides a realizing system of the virtual fitting room; the realizing system comprises a three-dimensional scene management subsystem, a Kinect management subsystem and a physical engine management subsystem. The method and the system enable the virtual clothes to perfectly match with the true human bodies so as to achieve the real fitting experience.

The invention discloses a modeling method of an oral cavity model used for an individual three-dimensional orthodontic force test. The modeling method comprises the following steps of: 1) performing CT data acquisition; 2) rebuilding a three-dimensional model of an oral cavity tissue; 3) correcting bended dedendums of molars with multiple dedendums; 4) designing a parodontium; 5) removing an amplified tooth model from an alveolar bone model without dedendum fossa; 6) designing a guide plate used for locating a correct position of a tooth in the tooth fossa; 7) designing a base of the oral cavity model; 8) processing the teeth, the alveolar bone and the guide plate by using a hard material through a rapid proto-typing technology; 9) mixing a silica gel material for sealing and an elastic material to serve as a simulated material of the parodontium; and 10) filling the simulated material of the parodontium into the dedendum fossa on the alveolar bone and then inserting the teeth to finally obtain an oral cavity orthodontic force measurement and simulation model. The modeling method of the oral cavity model used for the individual three-dimensional orthodontic force test can obtain precise correcting force and torque, has relatively good reliability, and can efficiently guide an individual orthodontic force test model of an individual orthodontics schematic design.

The invention discloses a multi-view gait identification method based on an adaptive three dimensional human motion statistic model. Images of a training set of the invention are from a plurality of shooting systems, and target point cloud is generated through the multi-vision three dimensional reconstruction technology so as to construct a three dimensional statistic human body model. A virtual camera performs projection transformation on the three dimensional statistic human body model to obtain a composite human body contour binary image under any visual angle to be used for further extracting various gait characteristics. Based on the three dimensional human body model, a skeleton model is established to provide a reasonable range for the free degree of each joint; in addition, a three dimensional human motion statistic model is established, which is adaptive to various different walking occasions through parameter adjustment. In a training phase, a gait characteristic database is established based on the method. In an identification phase, same gait characteristics are extracted from videos to compare with characteristics in the database; and an optimum identification object is found based on a nearest specimen classifier and a highest scoring strategy.

The invention discloses a method for designing and forming an anatomical bone plate of an individualized bone model, which includes the following steps: 1) Data collection: use a CT machine to scan both sides of the affected side and the healthy side of the patient, and collect image files in Dicom format file, imported into medical 3D reconstruction software for 3D reconstruction; 2) using medical 3D reconstruction software, the image is segmented according to CT scan data, and bone 3D model reconstruction is carried out, which is materialized and converted into a solid model format file in reverse engineering software; 3) Use computer-aided design CAD software to reconstruct the model according to the three-dimensional bone. The design and forming method of the anatomical bone plate of the individualized skeletal model of the present invention can quickly customize an individualized anatomical internal fixation plate with a high bone matching degree according to different patients, different parts, and different fracture characteristics, so that the internal fixation plate of the patient The fixing plates are fully individualized and provide optimum fixing performance.

The invention discloses a principal vector analysis based broken bone section segmentation and broken bone model registration method. The method comprises the following steps of S1: performing axis extraction of a broken bone model by adopting a principal vector analysis algorithm; S2: extracting a grid vertex set of a broken bone section according to normal vector mutation of a triangular patch on a broken bone three-dimensional grid model and an included angle between the triangular patch and the broken bone axis; S3: performing spatial rough registration on the broken bone three-dimensional grid model in combination with methods for alignment of the broken bone axis and alignment of a principal vector of the grid vertex set of the broken bone section; S4: performing multi-time iterative computation for grid vertex sets of two broken bone sections by utilizing an iterative closest point algorithm to realize spatial fine registration of the broken bone three-dimensional grid model; and S5: according to a complete skeleton model obtained by broken bone three-dimensional grid model registration, performing fitting of a fracture steel plate model. According to the method, the grid vertex set of the broken bone section can be accurately segmented, rough consistency of the sections is realized in rough registration, the precision of fine registration is improved, and the success rate of fine registration is increased.

An individualized design method for a diabetic foot shoe pad comprises the steps that firstly, a general foot bone model is established, then key size data of the diseased foot is acquired, the general foot bone model is scaled to obtain an individualized bone model of the diseased foot, then three-dimensional data of surface appearance of the diseased foot is acquired and is coupled with the individualized bone model, and assembly is performed in CAN software to obtain an individualized three-dimensional model of the diseased foot; then, based on the three-dimensional model of the foot, a diabetic foot shoe pad base model completely fit with the foot is established according to foot bottom appearance characteristics and is imported into finite element analysis software with the three-dimensional model of the foot to perform assembly and grid partitioning, a finite element model of a foot-shoe pad is obtained, then a stress distribution result is analyzed and calculated, the modulus and structures of zones of the diabetic foot shoe pad base model are modified to form a final diabetic foot shoe pad model. The designed shoe pad meets the individualized demand, meanwhile a product design period is shortened, and the cost is reduced.