VR Dental X-Ray Imaging Without Radiation
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Solution Overview
Problem
Conventional methods for assessing dental X-ray periapical films lack the ability to generate images, making it difficult to determine the correctness of the film placement and resulting in low learning efficiency and reliability.
Innovation Solution
A VR-based virtual imaging method is developed to simulate a dental X-ray periapical film without radiation, using VR hardware to construct a spatial positioning system, scanning teeth to create 3D digital models, and rendering a virtual dental X-ray periapical film through real-time camera control and network communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional oral periapical film assessment methods are used, then students can practice film placement, but no X-ray images are generated making assessment unreliable
Solution Approach 1:
The patent creates a virtual copy of the X-ray imaging process using VR technology. Instead of using real X-ray equipment that emits radiation, the system generates virtual X-ray periapical films by rendering 3D dental models from multiple angles and synthesizing radiographic images. This copying approach provides complete image information for assessment without radiation exposure, resolving the contradiction between assessment reliability and information completeness.
2Object-affected harmful factors
If real X-ray equipment is used for training, then authentic X-ray images can be obtained, but radiation exposure threatens life and health
Solution Approach 1:
The patent converts the harmful radiation aspect into a beneficial virtual imaging system. By using VR rendering technology to simulate X-ray image formation, the system eliminates radiation exposure while maintaining training authenticity. The virtual X-ray films are generated through computational rendering of 3D dental models, providing authentic radiographic appearance without the harmful physical radiation, thus converting the harm into a safe training solution.
3Device complexity
If VR technology is used to simulate dental X-ray imaging, then radiation is eliminated, but the complexity of constructing virtual imaging environment increases
Solution Approach 1:
The patent implements a multi-functional VR system that combines spatial positioning, 3D model rendering, virtual X-ray film generation, and assessment capabilities into a single integrated platform. The system uses a tracker fixed on the dental film machine tube to capture positioning information, which is then used to control the virtual camera and generate radiographic images. This universal system eliminates radiation while providing complete imaging and assessment functions, justifying the initial complexity through comprehensive functionality.
4Productivity
If students place film based on estimated positions, then training can proceed, but learning efficiency is low due to lack of visual feedback
Solution Approach 1:
The patent implements immediate visual feedback by generating virtual X-ray periapical films based on the actual positioning of the dental film machine. The system captures the tracker's attitude matrix and position data, uses this to control the virtual camera's viewpoint, and renders the corresponding radiographic image in real-time. This feedback loop allows students to immediately see the results of their positioning actions, significantly improving learning efficiency by providing the visual information that was previously missing.
Data Source
AI summary
A ray-free dental X-ray periapical film virtual imaging method based on virtual reality (VR) includes: constructing a VR positioning system, and tracing a position of a tracker bonded bound with a tube of a dental film machine and a spatial attitude matrix in real time; scanning and reconstructing a digital three-dimensional (3D) model of dentition; respectively setting different materials and transparency for a shell of a tooth model and an internal pulp cavity; constructing a virtual environment of a simulated oral cavity; assigning an attitude and position of the tracker to a virtual camera by using a network communication module, and controlling the virtual camera to move; placing the tracker in a specific position and orientation to calibrate so as to obtain a position coordinate of a dentition model in the virtual environment; and aligning the tube to teeth, and rendering a virtual periapical film.