THA Implant Positioning Using Functional Imaging Safe Zones
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Solution Overview
Problem
Existing surgical procedures for implanting prosthetic implants often result in misalignment or malpositioning, leading to issues such as dislocation, premature wear, fractures, and discomfort due to the lack of effective pre-planning tools that consider patient-specific musculoskeletal kinematics.
Innovation Solution
A computer-implemented method that utilizes functional medical images to define reference axes, determine spatial transformations, and render 3D models of implants, providing safe zones for implant positioning based on user input, allowing for real-time adjustments and overlays on multiple images to ensure optimal alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional surgical procedures are used without pre-planning tools, then the surgical process is simpler and faster, but implant alignment accuracy deteriorates leading to misalignment and malpositioning
Solution Approach 1:
The system performs pre-operative planning by rendering 3D models of implants on functional medical images and determining safe zones for implant positioning before the actual surgery. This preliminary action allows surgeons to visualize and plan implant placement, improving alignment accuracy while avoiding the need for complex intraoperative adjustments.
Solution Approach 2:
The system creates digital 3D copies of implants and overlays them on functional medical images to simulate implant positioning. This virtual copying allows surgeons to test different implant positions and configurations without physical trial implants, improving precision while maintaining relative simplicity.
2Reliability
If implant positioning is performed without considering patient-specific musculoskeletal kinematics, then the procedure is faster, but post-operative complications increase due to dislocation and premature wear
Solution Approach 1:
The system determines safe zones for implant positioning by analyzing patient-specific musculoskeletal kinematics from functional medical images before surgery. This preliminary analysis of patient-specific anatomy and movement patterns ensures reliable surgical outcomes by identifying optimal implant positions that account for individual kinematic characteristics.
3Manufacturing precision
If multiple images and 3D models are rendered and overlaid for pre-planning, then implant placement accuracy improves, but computational resources and processing time increase
Solution Approach 1:
The system uses a single functional medical imaging system that captures multiple views and enables 3D reconstruction, rendering, and safe zone determination in an integrated platform. This multi-functional approach improves implant placement accuracy while avoiding the need for separate imaging and analysis systems, thereby reducing overall computational energy consumption.
Data Source
AI summary
Disclosed are methods and systems to provided planning tools for surgery, particularly for THA. Images of musculoskeletal structure of a patient (e.g. associated with respective planes and in a same or different functional position) may be displayed together and via co-registration and spatial transformations, 3D implants or other objects may be rendered and overlaid in a same position correctly with respect to each image. Measures may be represented with respect to various planes associated with the respective image and/or with respect to an existing implant. A safe zone (graphical element) may be rendered and overlaid with respect to each displayed image to indicate a clinically accepted safe range of positions for the 3D implant. Different instances of implants having respective characteristics affecting range of motion may be available for use during a procedure. For a set of available implants minimal and maximal safe zones may be presented for planning assistance.