Augmented X-ray and Optical Visualization via Virtual Viewpoint
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Solution Overview
Problem
Existing methods for combining X-ray and video images in medical imaging reduce the working space in operating rooms, limiting the movement of surgeons due to the need for an X-ray transparent mirror, which is not ideal for surgical environments.
Innovation Solution
A medical imaging apparatus comprising an X-ray detector and source positioned with a camera setup adjacent to the detector, capable of delivering optical stereoscopic or 3D images, allowing for the calculation of a virtual viewpoint that superimposes X-ray and optical images without requiring alignment, thus maintaining space for surgical maneuvers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an X-ray transparent mirror is used to deflect the optical image to align with the X-ray source viewpoint, then the X-ray and video images can be superimposed, but the working space below the X-ray source is reduced, limiting surgeon movement
Solution Approach 1:
The patent creates a virtual copy of the X-ray source viewpoint using computer-generated imagery. Instead of physically positioning the camera at the X-ray source location (which would require an X-ray transparent mirror), the system captures optical images from the actual camera position and computationally generates a virtual viewpoint that matches the X-ray source perspective. This virtual copy allows accurate image superposition without occupying physical space below the X-ray source, thus preserving surgeon movement space while achieving precise image alignment.
2Measurement precision
If the camera is positioned at the X-ray source location with an X-ray transparent mirror, then the optical and X-ray images can be correlated from the same viewpoint, but the device complexity increases due to the mirror alignment procedure
Solution Approach 1:
The patent replaces the mechanical optical system (X-ray transparent mirror and physical camera positioning) with a computational system. Instead of using a mirror to physically redirect light paths and requiring complex mechanical alignment procedures, the system uses software algorithms to calculate and generate a virtual viewpoint that corresponds to the X-ray source position. This substitution of mechanical components with computational processing eliminates the need for mirror alignment while achieving the same viewpoint correlation accuracy.
3Loss of information
If an X-ray transparent mirror is employed to achieve image superposition, then the composite image can be obtained, but the loss of working space is significant in operating room environments
Solution Approach 1:
The patent transitions from a three-dimensional physical space solution to a two-dimensional virtual space solution. Instead of physically positioning equipment in the spatial dimension below the X-ray source (which consumes operating space), the system creates a virtual representation in the digital domain. The virtual viewpoint and computationally generated images exist in a separate digital dimension, allowing complete image integration and superposition without occupying any physical surgical working space.
Data Source
AI summary
A medical imaging apparatus for combined X-ray and optical visualization is provided. It comprises: an X-ray detector positioned above a patient; an X-ray source positioned below a patient; a control device; and a camera setup adapted to deliver an optical stereoscopic or 3D image. Thereby, the camera setup is positioned adjacent to the X-ray detector above the patient, and the control device is adapted to calculate an optical 2D image or a 3D surface from the data delivered by the camera setup, that optical 2D image or 3D surface having a virtual viewpoint similar to the viewpoint of the X-ray source. It is further adapted to superimpose an X-ray image acquired by the X-ray detector and the optical 2D image or 3D surface in order to achieve an augmented optical/X-ray image.


