MRI-Compatible 3D Display Using Faraday Cage and Passive Optics
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Solution Overview
Problem
Existing 3D display technologies, such as shutter glasses and FPR 3D, are not suitable for MRI environments due to electromagnetic interference and resolution issues, limiting the ability to provide an immersive 3D experience for patients during Magnetic Resonance Imaging procedures.
Innovation Solution
An MRI-compatible 3D display system using FPR technology with shielded LCD or OLED TVs housed in a Faraday cage and circularly polarized glasses or goggles, ensuring electromagnetic interference shielding and maintaining high resolution for a 3D effect without the need for active electronics in the MRI room.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shutter glasses with active electronics are used in MRI environment, then 3D effect is achieved, but electromagnetic interference with MRI equipment occurs
Solution Approach 1:
The patent removes all active electronic components and batteries from the 3D display system within the MRI room. Instead of using active shutter glasses with electronics, the system employs passive optical elements (polarizing filters, beam splitters) that create the 3D effect without generating electromagnetic interference, thus extracting the harmful electronic components from the MRI environment.
Solution Approach 2:
The patent replaces expensive, complex active electronic shutter glasses with simple, passive optical components that have no moving parts or power requirements. These passive elements can be easily replaced if needed and do not pose electromagnetic interference risks, effectively using simpler components to solve the reliability issue.
2Reliability
If FPR 3D technology is used, then 3D effect is achieved, but image resolution is reduced due to polarization filtering
Solution Approach 1:
The patent divides the display system into separate optical paths for left and right eyes using beam splitters and polarizing filters. By segmenting the light paths and using high-quality polarizing optics, the system maintains image resolution while creating the 3D effect, avoiding the resolution loss associated with conventional FPR filtering methods.
Solution Approach 2:
The patent uses composite optical systems combining beam splitters, polarizing filters, and precise optical alignment to achieve both 3D functionality and high resolution. The combination of these optical elements creates a system that preserves image quality while enabling stereoscopic viewing.
3Ease of operation
If LCD TV is placed in MRI room, then 3D content can be displayed, but electromagnetic interference with MRI equipment occurs
Solution Approach 1:
The patent extracts the LCD display from the MRI room environment, placing it in the control room instead. Only passive optical components and fiber optic cables are brought into the MRI room, eliminating the source of electromagnetic interference while maintaining the ability to deliver 3D content to patients through the optical fiber connection.
Solution Approach 2:
The patent introduces fiber optic cables as an intermediary to transmit 3D content from the control room to the MRI room. This optical intermediary allows high-quality 3D content delivery without introducing electromagnetic interference, as optical fibers transmit light rather than electrical signals.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables a safe and high-quality 3D viewing experience for patients in MRI environments by effectively blocking electromagnetic interference and maintaining image resolution, allowing for immersive 3D content delivery without compromising the MRI equipment's functionality.
Implementation Method 1
housed in a Faraday cage
Implementation Method 2
circularly polarized glasses or goggles
Data Source
AI summary
A display system compatible with a magnetic resonance imaging (MRI) apparatus disposed in a magnet room for producing video images to a patient in an MRI magnet tunnel, the images having a three-dimensional (3D) effect. An MRI-compatible 3D display includes a display panel configured to generate optical images having 3D content, and RF and electromagnetic interference filtering. A Faraday cage encloses the display panel, and includes an optically transparent window panel having an electrically conductive mesh and a layer of transparent optically isotropic material.