Customized Arthroplasty Cutting Jig from 2D MRI Images
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Solution Overview
Problem
Current methods for creating customized arthroplasty cutting guides are time-consuming and prone to geometrical errors, requiring extensive numerical work and dense three-dimensional grid point representations, which limits their application in mass manufacturing and introduces inaccuracies.
Innovation Solution
A method utilizing two-dimensional MRI images to create customized arthroplasty cutting jigs by reformating images to approximate true anatomical coordinates, locating mating shapes, and generating a milling program for precise cutting jig production, reducing the need for extensive three-dimensional modeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dense three-dimensional grid point representations are used to create customized cutting guides, then manufacturing precision is improved, but device complexity and time consumption increase significantly
Solution Approach 1:
The patent extracts only the essential geometric information needed for cutting guide fabrication from the 2D MRI images, rather than creating complete dense 3D models. By identifying and extracting key anatomical landmarks and surface points directly from 2D images, the method obtains sufficient data for manufacturing without the complexity of full volumetric reconstruction
Solution Approach 2:
The patent reverses the traditional approach by working from 2D images to create 3D cutting guides, rather than scanning actual 3D bone surfaces. This dimensionality reversal simplifies the process by using existing 2D medical imaging data that already contains the necessary anatomical information, eliminating the need for complex 3D scanning and grid point generation
2Manufacturing precision
If customized cutting guides are created using traditional methods, then manufacturing precision is improved, but productivity is reduced due to time-consuming processes
Solution Approach 1:
The patent performs preliminary actions by utilizing 2D MRI images that have already been acquired for diagnostic purposes. These pre-existing images contain the necessary anatomical information, eliminating the need for additional time-consuming 3D scanning procedures. The method extracts required geometric data directly from these preliminary images, accelerating the customization process
Solution Approach 2:
The patent creates accurate digital copies of bone surfaces and anatomical features directly from 2D MRI image data. By reconstructing 3D surface geometry from 2D slices through computational methods, the system generates precise digital models suitable for manufacturing cutting guides without requiring physical 3D scanning, thereby reducing production time while maintaining accuracy
3Manufacturing precision
If extensive three-dimensional modeling is performed to create cutting guides, then manufacturing precision is improved, but loss of time increases significantly
Solution Approach 1:
The patent extracts only the essential geometric information needed for cutting guide fabrication from the 2D MRI images, rather than creating complete dense 3D models. By identifying and extracting key anatomical landmarks and surface points directly from 2D images, the method obtains sufficient data for manufacturing without the complexity and time consumption of full volumetric reconstruction
Solution Approach 2:
The patent applies partial action by creating simplified 3D surface models from 2D images that contain only the necessary information for cutting guide manufacturing. Rather than generating complete and overly detailed 3D reconstructions, the method produces adequate geometric representations that are sufficient for the intended application, reducing processing time while maintaining necessary precision
Data Source
AI summary
Aspects of the present disclosure involve systems, methods, computer program products for customized arthroplasty cutting guides or jigs. In particular, the present disclosure provides for a method of creating a customized arthroplasty cutting jig from one or more two-dimensional (2D) images of the patient's joint. The method includes receiving the 2D images of the joint from an imaging device, reformatting the images, and creating a customized jig template from the images. One or more landmarks are electronically marked on one or more of the series of 2D images of the patient's joint through a computing device. Once the template for the cutting jig is created utilizing one or more of the electronic markers on the 2D images, a cutting or milling program is generated by the computing device that may then be provided to a milling machine to create the cutting jig corresponding to the milling program.