199 results about "Preoperative planning" patented technology

A method for assisting a user with surgical implementation of a preoperative plan includes generating a physical native tissue model of a native patient tissue. The physical native tissue model includes at least one primary patient tissue area including a surface of interest, at least one secondary patient tissue area including no surfaces of interest, and a base surface for engaging a supporting structure. The physical native tissue model, as generated, includes at least one information feature providing clinically useful information to the user. The information feature is substantially separated from the surface of interest. An apparatus for assisting a user with surgical implementation of a preoperative plan is also provided.

A method for selecting modular neck components for hip implants based on independent variables associated with physical characteristics of the implant, including leg length, offset, and anteversion. During surgery, the surgeon may be confronted with a need to change a preoperatively-chosen modular neck. For example, the surgeon may desire a change in at least one of the variables, e.g., leg length, offset, and / or anteversion. The present method allows the surgeon to quickly and easily select a different modular neck based on an evaluation of one of the variables without requiring reevaluation of the other variables. The method may include preoperative planning in which a template including a grid coordinate system is used.

A case for modular neck components for hip implants. The case may include indicators based on independent variables associated with physical characteristics of the implant, including leg length, offset, and anteversion. During surgery, the surgeon may be confronted with a need to change a preoperatively-chosen modular neck. For example, the surgeon may desire a change in at least one of the variables, e.g., leg length, offset, and / or anteversion. The case allows the surgeon to quickly and easily select a different modular neck based on an evaluation of one of the variables without requiring reevaluation of the other variables. A method described herein may include preoperative planning in which a template including a grid coordinate system is used, which advantageously provides an intuitive system for the surgeon both preoperatively and during surgery.

Methods of manufacturing a custom arthroplasty resection guide or jig are disclosed herein. For example, one method may include: generating MRI knee coil two dimensional images, wherein the knee coil images include a knee region of a patient; generating MRI body coil two dimensional images, wherein the body coil images include a hip region of the patient, the knee region of the patient and an ankle region of the patient; in the knee coil images, identifying first locations of knee landmarks; in the body coil images, identifying second locations of the knee landmarks; run a transformation with the first and second locations, causing the knee coil images and body coil images to generally correspond with each other with respect to location and orientation.

Methods and systems to analyze and predict patient-specific physiological behavior of a human organ or anatomical entity such as the heart complex and the heart subcomponents from 3-dimensional volumetric ultrasound (3D) or time-sequential volumetric (4D) ultrasound image data, to assist physicians in performing diagnostics and cardiac preoperative planning. Also disclosed herein are methods and systems to segment patient-specific anatomical features from 3D / 4D ultrasound. Also disclosed herein are methods and systems to compute patient-specific tissue motion and blood flow from 3D / 4D ultrasound and contrast-enhanced 3D / 4D ultrasound image data. Also disclosed herein are methods and systems to simulate the patient-specific mechanical behavior of the organ and anatomical entity using both 3D / 4D ultrasound and mechanical models. Also disclosed herein are methods and systems to estimate tissue stress and strain and physiological parameters of the tissues from 3D / 4D ultrasound.

The invention discloses a local ablation method for liver cancer. The local ablation method comprises the following steps: carrying out modular partition including the liver, the tumor focus, the blood vessel and the tissue around the liver in sequence on the preoperative image after registration, and carrying out puncture path planning and puncture thermal field planning; carrying out multi-modal image registration on the preoperative image and an intra-operative image, outputting the tumor focus of the preoperative image, and displaying the tumor focus on the intra-operative image in a fusion manner; and carrying out multi-modal image registration on the preoperative image and a postoperative image, outputting the tumor focus in the preoperative image, and displaying the tumor focus in the preoperative image on the postoperative image in a fusion manner, wherein the preoperative image and the postoperative image respectively comprise the CT image and / or MR image of the time sequence, and the intra-operative image comprises the CT image. According to the method, the image registration step is added in preoperative planning, the intra-operative locating and postoperative assessment, thus the scientific planning for the tumor thermal ablation before the operation, the visual and effective information display in treatment during the operation, and the scientific assessment for the curative effects and the treatment experience feedback after the operation are realized, so that the preoperative planning is guided.

The invention discloses an intelligent operation auxiliary system based on virtual reality and augmented reality. The intelligent operation auxiliary system comprises a data preprocessing unit (1), a preoperative planning unit (2) and an intranperative auxiliary unit (3), and the data preprocessing unit rebuilds a three-dimensional focus model through an original CT / MRI image; the preoperative planning unit builds a virtual image studio through virtual reality equipment, loads the three-dimensional focus model for a user to go deep inside the lesion organ to make an operation scheme plan, and exports a three-dimensional planning model; the intranperative auxiliary unit calls the three-dimensional planning model through augmented reality equipment to obtain space characteristic points of the three-dimensional planning model, conducts registration and fusion on a real focus part, helps a doctor to recognize a dissection structure, displays an operation scheme decision and quantifies physiological data at the same time at the same time to execute an intranperative plan. The intelligent operation auxiliary system based on the virtual reality and the augmented reality solves the problems that the dissection structure is difficult to recognize and intranperative real-time navigation is lacking, and the success rate of a surgical operation is increased.

A method for locating a guide wire axis on a femoral neck comprises the steps of tracking a position and orientation of a femur; registering a frame of reference with respect to the position and orientation of the femur from a first registration probe mounted onto the femur in a predetermined configuration, the frame of reference having preoperative planned data pertaining to the femoral neck; digitizing femoral neck data with respect to the position and orientation of the femur from a second registration probe positioned onto the femoral neck at desired orientations; calculating a position and orientation of the guide wire axis with respect to the position and orientation of the femur as a function of the preoperative planned data and the femoral neck data.

The invention discloses a navigation system and method of a minimally invasive surgery. The navigation system comprises a composite endoscope body, a spatial positioning device and a surgery navigation server. The method comprises the steps that preoperative diagnostic images are subjected to three-dimensional model reconstruction and preoperative planning before navigation is performed; during the navigation, three-dimensional optical image signals and two-dimensional ultrasonic image signals of intraoperative organs and tissue are simultaneously acquired and three-dimensional reconstruction is performed, a three-dimensional model of the preoperative diagnostic images with preoperative planning information is subjected to organ and tissue deformation correction, and a three-dimensional optical model and a dynamic preoperative registration model are subjected to registration and fusion, so that the functions of optical navigation and ultrasonic navigation are simultaneously achieved, the intraoperative optical navigation can be switched to the intraoperative ultrasonic navigation continuously in real time, and a key position point, an optimum surgical entry point and an internal travel path of the intraoperative organs and tissue are continuously achieved in all dimensions from surfaces of organs and tissue to inner structure of organs and tissue. The navigation system and method of the minimally invasive surgery overcomes the defect of relatively single and discontinuous functions existing in the prior art, and is capable of lowering surgical risks.

The invention discloses a preoperative planning and surgery virtual reality simulation method of the minimally invasive cardiac surgery. The method comprises the steps that firstly, data from CT or MRI is preprocessed by means of the eFilm workstation medical image processing software, a normal image coordinate system is built, and medical images scanned by the CT, the MRI and PET are imported into a computer; the obtained two-dimensional medical images are reconstructed in a three-dimensional space to obtain three-dimensional images; the two-dimensional voxel-level medical images are imported into a Unity 3D engine, the conversion from the two-dimensional images to the three-dimensional images is conducted by the computer, and real-time dynamic three-dimensional images are generated; a surgery planning and simulation platform is built by means of the Unity 3D engine, virtual reality patient data is input, warning and reminding are conducted on wrong or risky operating steps, and meanwhile the simulation surgery effect of a doctor is assessed. According to the method, detailed preoperative planning and surgery simulation can be conducted through the virtual reality environment before a surgery.

The invention relates to a robot-assisted oblique-tip flexible needle puncture system and method. The method comprises the following steps: obtaining the position of a puncture platform and a puncture path through preoperative planning; moving a positioning mechanism to a specified position and locking the positioning mechanism, and controlling a puncture mechanism to enable a flexible needle to reach a penetration point of puncture; puncturing according to the planned puncture path; optimizing, by a path planning module, the puncture path of the flexible needle on line in real time according to flexible needle tip position information, attitude information and a puncture region tissue image fed back by a three-dimensional electromagnetic positioning sensor and a C-shaped arm in the puncture process; correcting the flexible needle by a controller according to a real-time on-line optimization strategy of the path planning module; ending the puncture process after the puncture needle reaches a target position. According to the method and the device, the position of the needle tip can be obtained in real time, the stress of the needle tip is obtained in real time, the puncture strategy is corrected on line according to tissue deformation to guarantee that the oblique-tip flexible needle can bypass an unpuncturable region to accurately reach a focus, and the puncture process is put under the monitoring of a doctor to guarantee the safety of the puncture surgery.

A magnetic resonance imaging system for interventional MR imaging involves operations to insert a device such as a catheter into an object. According to the system, a tip position of the catheter is detected, data indicative of moved loci of the catheter are produced from data indicative of the detected tip position, and the produced movement locus data are displayed. In addition, even when an operator changes the progress direction of the device such as a puncture needle, an imaging cross-section automatically tracks movements of the device. Appropriate preoperative planning is also provided.

Steps S101 and S102 of displaying images which input two-dimensional tomographic images of the lower limb including the knee joint and displays three-dimensional images of the femur and the tibia including the knee joint from the image input, steps S103 to S105 and S106 to S108 of determining artificial joint which determine the artificial joint to be replaced from the three-dimensional images of each knee joint of the femur and tibia, and steps S113 and S114 of parameter determination which determine various parameters used in an artificial knee joint replacement operation using an alignment rod in the marrow to be inserted into the femur based on the artificial joint and reference points of the knee joint determined in steps S103 to S105 of determining femur side artificial joint are performed by a computer.

The invention discloses an individual orthopedics department positioning sheet based on the medical image three-dimensional reconstruction and computerized design technology. The individual orthopedics department positioning sheet is manufactured based on 3D printing or other machining methods and is used for knee prosthesis. The positions of key positioning holes and cutting faces in knee prosthesis are particularly and accurately determined. Firstly, a skeleton model is reconstructed based on medical images; preoperative planning is carried out on the reconstructed model so as to determine important parameters of a lower extremity force line, a thighbone rotating shaft, an osteotomy reference point and the like and simulate osteotomies and prosthesis imbedding; by means of the results, the positioning sheet (in a single positioning type or a composite type) is determined and designed; a doctor logs into a data management module to query data. The single positioning type positioning sheet is formed by thickening and punching on an extraction face of the reconstructed model; the composite positioning sheet is a combination of the single positioning type positioning sheet and an osteotomy device, and the osteotomy positioning function is achieved. By means of the positioning sheet designed through an auxiliary system, the lower limb force line can be accurately reconstructed, and accurate osteotomies can be achieved; an informatization management method is provided by the data management module for operations, and convenience is brought to data storage and querying.

The invention discloses a bone cutting navigation device capable of positioning accurately and a manufacturing and using method thereof. According to the device and method, a 3D printing navigation template technology is introduced and applied to the PAO. The 3D printing navigation template technology is a product by organically combining a three-dimensional reconstruction technology in medical imaging, a computer aided design technology, a converse project technology and a 3D printing technology. Firstly, three-dimensional reconstruction is conducted on CT scanning data of a patient before surgical operation to make a doctor visually know pathology anatomic abnormities, and accurate and specific numerical values are obtained; then, surgical operation simulation is conducted before the surgical operation according to different changes of pathological anatomy, and the best personalized operation treatment scheme is made; next, the surgery field pelvic anatomical state feature and the bone cutting face are extracted according to the preoperative planning through the converse project technology, and a navigation template is designed and made into an entity through the 3D printing technology; finally, the disinfected navigation template is directly attached to the exposed pelvis and the bone cutting face in the surgical operation, and accurate bone cutting and rotating displacement of acetabulum bone blocks are completed.

The invention discloses an interventional planning navigation system based on CT- MRI fusion and a navigation method thereof. The system comprises: a preoperative planning module that segments a prostate region and an urethra from a MRI image, marks a suspicious lesion region, and then constructs a three-dimensional structure, and finally plans an optimal puncture path; a spatial positioning module that is used to complete spatial registration of a CT image and the MRI image of a patient and obtains a transformation matrix from magnetic locator space and a CT image space; a puncture guiding module that is used to obtain a position and a posture of a puncture needle, so as to guide travel of the puncture needle. The interventional planning navigation system of the invention facilitates to locate a suspicious lesion without changing CT guidance by combining imaging advantages of the CT and the MRI, thereby specifying a target area of diagnosis and treatment, and improving accuracy of prostate interventional surgery; and fully combines multimodal medical image information, a spatial positioning technology and a three-dimensional visualization technology to make guidance to operation more intuitive and to improve convenience of prostate interventional surgery.

The present invention provides systems and methods for enhancing the delivery and display of medical images for preoperative planning and diagnosis. Various characteristics of the data associated with the image or images being viewed may be manipulated and stored. The system and method provide automated annotation of the images to assist accuracy and speed of review.

The embodiment of the invention discloses a joint replacement surgical robot navigation and positioning system and method. The system comprises a preoperative planning module which is used for carrying out segmentation and reconstruction of a hip joint according to the obtained medical image data of the hip joint, obtaining a three-dimensional model of the hip joint, carrying out the preoperative planning, and determining a surgical scheme; an optical navigation positioning module which is used for generating a navigation instruction according to the surgical scheme, registering the hip joint three-dimensional model according to the spatial position relationship between the hip joint of a patient and an operation probe to obtain a hip joint solid model, and determining the bone operation position of the patient according to the hip joint solid model; and a mechanical arm control module which is used for moving an end effector to the bone surgery position of the patient and controlling the end effector to perform osteotomy, filing and press-fit operation on the hip joint according to the navigation instruction. Preoperative planning is executed through the orthopedic surgery robot, surgery operation is completed at a high level, the operation intensity of doctors can be greatly reduced, the operation time is saved, and the operation precision is improved.

The embodiment of the invention provides a total knee arthroplasty preoperative planning method and device, and the method comprises the steps: obtaining a knee joint X-ray film image, and determining the real size of the knee joint X-ray film image; inputting the knee joint X-ray film image into a neural network identification model for identification, and determining key points and key axes; determining femur size parameters and tibia size parameters based on the key points and the key axes; determining types and models of a thighbone prosthesis and a tibia prosthesis based on the thighbone size parameter and the tibia size parameter; and based on the key axis, the type and the model of the femoral prosthesis and the type and the model of the tibia prosthesis, determining placement positions and placement angles corresponding to the femoral prosthesis and the tibia prosthesis. Therefore, according to the embodiment of the invention, the cost can be saved, the randomness of manual measurement is avoided, and an important reference function is provided for calculation of various parameters and placement of the prosthesis, so that the dependence on a surgeon is reduced.

The embodiment of the invention discloses a joint replacement surgery navigation system and method. The system comprises a preoperative planning module, and a navigation registration module, wherein the preoperative planning module is used for performing segmentation and reconstruction according to obtained hip joint medical image data to obtain a hip joint three-dimensional model, performing preoperative planning, and determining the placement position, size and angle of a prosthesis; and the navigation registration module is used for determining the spatial positions of the pelvis and the femur according to a pelvis reference frame and a femur reference frame, registering the hip joint three-dimensional model according to the spatial position relationship between an operation probe and the pelvis reference frame and the femur reference frame to obtain a hip joint solid model, and according to the hip joint solid model, controlling a surgical instrument for clamping the prosthesis to place the prosthesis in the hip joint. Through preoperative planning of information such as an operation approach and a prosthesis placement position, a spatial positioning method is used during an operation to track the operation instrument, navigation support is provided for a doctor while the operation accuracy is improved, and the operation is safer and more efficient.

The invention provides a total hip replacement revision preoperative planning method and equipment based on deep learning. The method comprises the following steps: acquiring pelvis and femur image data of a patient, acquiring a three-dimensional skeleton structure based on the pelvis and femur image data, and extracting an original implant in the three-dimensional skeleton structure; identifying key points in the three-dimensional skeleton structure; and based on the key points and the shape and size of the original implant, selecting a proper prosthesis model from a database in which prosthesis models are pre-stored, and carrying out visual simulation prosthesis matching. Technical support is provided for doctors to carry out total hip replacement revision, so that the surgical operation is more accurate and safer, and the development of the surgical operation towards the intelligent, precise and minimally invasive direction is promoted.

The invention discloses a personalized minimally-invasive knee joint positioning guide plate used for knee arthroplasty and manufactured on the basis of medical image three-dimensional reconstruction and computer-aided design technologies, 3D (three-dimensional) printing or other machining methods, and particularly relates to accurate determination of a positioning joint surface. Firstly, a patient skeleton model is reconstructed on the basis of a two-dimensional medical image; preoperative planning is performed on the reconstructed model, and important parameters such as a lower extremity force line, a femoral rotation axis and an osteotomy reference point are determined to simulate osteotomy and prosthesis implantation; a positioning sheet (single positioning type and composite type) is determined and designed with the results. The positioning sheet is used for positioning with a local positioning principle by means of local area jointing, so that over-positioning and positioning instability are avoided; meanwhile, the wound area is reduced to the maximum extent. A dissection point is positioned through the reconstructed model, so that the lower extremity force line can be reconstructed accurately, and accurate osteotomy is realized.

The invention discloses a microwave ablation treatment planning method based on a CT image. The method comprises the steps that a medical image sequence of a patient is read and displayed to perform three-dimensional reconstruction; the best needle inserting number and needle inserting route are selected according to a three-dimensional visualized result, wherein the route can avoid important tissues and organs, safety distance is reserved, and the route is the shortest route between a cutaneous needle inserting point and a target region; the optimal input parameters are inversely resolved according to the geometry of a tumor and a preset needle inserting route using an automatic three-dimensional thermal-dose optimization algorithm; the range of a three-dimensional tissue damage field anda temperature field is displayed to evaluate a treatment planning result. By means of the method, a doctor can be assisted in making a reasonable preoperative plan of microwave ablation operation, the clinical executing effect of an operation scheme designed by the doctor using a computer simulation method before the operation is conducted to provide a reliable operation guidance for the doctor,the executing difficulty of the operation is reduced, the operation is safer, and excess damage on the patient is reduced.

A method of preoperative planning and provision of patient-specific surgical aids includes creating a virtual model of a native patient tissue. A virtual device is placed into a predetermined device orientation relative to the virtual model of the native patient tissue. At least one predetermined landmark orientation is specified for placement of at least one virtual landmark relative to the native patient tissue. A virtual patient-specific template containing the predetermined landmark orientation and having a landmark guiding feature is generated. At least one virtual patient-specific placement guide configured to interact simultaneously with at least one previously placed virtual landmark and the virtual device when the virtual device is in the predetermined device orientation is generated. A physical patient-specific template is created as a tangible representation of the virtual patient-specific template. A physical patient-specific placement guide is created as a tangible representation of the virtual patient-specific placement guide.

According to one embodiment, a preoperative planning method performed by a computer for hip replacement arthroplasty, includes a base jig setting step of setting a three-dimensional image of a base jig having three or more columnar supports which abut on three or more reference points of the pelvis with respect to the three-dimensional image of the pelvis obtained at the image reconstruction step, and a parameter acquisition step of parameterizing and acquiring a direction of an indicator which runs through a predetermined position on the base jig in the three-dimensional image of the base jig set at the base jig setting step and becomes parallel to the installation direction of the joint prostheses determined at the joint prostheses determination step.