AR Limb Scanning Interface for Accurate 3D Printed Casts
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Solution Overview
Problem
Existing 3D printed casts face challenges in ensuring accurate scanning of limbs due to obstructions, incorrect patient positioning, and non-compliance, leading to incomplete or inaccurate models.
Innovation Solution
An augmented reality scanning interface provides real-time feedback to medical professionals, differentiating scanned and unscanned body parts, and integrates with machine learning to ensure accurate scanning and design optimization, including thermal comfort considerations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional 3D scanning techniques are used, then the scanning process is simple, but scanning accuracy deteriorates due to obstructions, incorrect positioning, and patient non-compliance
Solution Approach 1:
The patent implements real-time feedback mechanisms where the scanning system provides immediate visual guidance through augmented reality overlays, highlighting scanned versus unscanned areas, and offering corrective guidance when positioning errors are detected, thereby improving scanning accuracy without requiring complex manual intervention
Solution Approach 2:
The patent introduces an intermediary augmented reality interface layer between the scanning system and the operator, which translates complex scanning requirements into simple visual cues and guidance, allowing accurate scanning while maintaining operational simplicity
2Measurement precision
If augmented reality feedback is provided during scanning, then scanning accuracy is improved, but the complexity of the scanning interface increases
Solution Approach 1:
The patent uses color-coded overlays in the augmented reality interface to indicate scanning status - for example, highlighting scanned areas in one color and unscanned areas in another color - providing intuitive visual feedback that improves accuracy while maintaining ease of operation through simple color recognition
Solution Approach 2:
The system performs self-diagnosis and self-correction by automatically detecting scanning errors and providing guidance, reducing the need for complex manual intervention and maintaining operational simplicity while improving accuracy
3Manufacturing precision
If comprehensive scanning coverage is achieved, then model accuracy is improved, but scanning time increases
Solution Approach 1:
The patent enables continuous scanning through guided movement, where the augmented reality interface provides real-time direction to ensure complete coverage without interruptions, maintaining continuous productive action while achieving comprehensive accuracy
Solution Approach 2:
The system performs preliminary guidance and positioning checks before scanning begins, and provides real-time directional guidance during scanning, preventing time-consuming corrections later and ensuring efficient completion of accurate scans
Data Source
AI summary
A method of generating a 3D model of a body part includes scanning the body part with a 3D scanner; during the scanning step, generating, with an augmented reality user interface, an augmented reality view of said body part, wherein the augmented reality view differentiates between portions of the body part that have already been scanned and portions that have not yet been scanned; with guidance from the augmented reality view, completing the scan; and generating the 3D model based on data received from the scan. The augmented reality view is displayed on a practitioner-facing screen incorporated into the scanning device. The method may further include imaging the body part with a thermal imager and overlaying thermal scanning data onto the 3D model to thereby generate a distribution map of thermal sensitivity on the 3D model. The design is then generated with holes situated to maximize thermal comfort.