Multi-Imager Endoscope Layout for High Resolution in Small Profiles
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Solution Overview
Problem
Current endoscopes face a trade-off between reducing their cross-sectional size for easier navigation and maintaining high image resolution, as well as effective use of working channels, which is addressed by incorporating multiple ultra-small image sensors without compromising image quality.
Innovation Solution
The integration of multiple ultra-small image sensors, such as four 200×200 pixel CMOS imagers, within the endoscope's distal tip, combined with computational photography techniques to enhance image resolution and navigation accuracy using inertial measurement units and haptic feedback systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single large imager is used, then image resolution is improved, but the endoscope cross-sectional size increases
Solution Approach 1:
The patent divides the single imager into multiple imagers (first imager, second imager, third imager, fourth imager) arranged in a circular pattern around the central axis. Each imager captures light from different angular positions, and the images are computationally combined to produce a high-resolution composite image, thereby achieving high resolution without requiring a single large sensor that would increase the endoscope cross-section.
Solution Approach 2:
The patent transitions from a single-point imaging approach to a multi-point angular imaging approach. By arranging imagers in a circular array around the central axis, the system captures light rays from multiple angles simultaneously, creating a dimensional expansion that enables high-resolution imaging without increasing the radial cross-sectional size of the endoscope.
2Measurement precision
If multiple imagers are used, then image resolution is improved, but device complexity increases
Solution Approach 1:
The patent designs the multiple imagers to serve multiple functions: each imager not only captures images but also functions as a light source when activated by the controller. This multi-functionality reduces the need for separate dedicated light sources and simplifies the overall system architecture while maintaining high image resolution through the circular array configuration.
Solution Approach 2:
The patent merges the imaging and illumination functions into a single integrated system. The same circular array of imagers that captures images also serves as the light source for illumination, with the controller selectively activating specific imagers. This consolidation reduces device complexity by eliminating separate light source components and integrating control functions.
3Length of moving object
If the insertion tube is made smaller, then navigation through tortuous pathways is improved, but working channel size is reduced
Solution Approach 1:
The patent positions the circular array of imagers and light sources within the distal end of the insertion tube, nesting these functional components within the existing structural constraints. The imagers are arranged in a circular pattern that fits within the insertion tube diameter, allowing high-resolution imaging capabilities without requiring an enlarged insertion tube that would compromise navigation through tortuous pathways.
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
This approach allows for a reduced-profile endoscope with improved image resolution and navigation capabilities, enabling precise anatomical mapping and enhanced diagnostic capabilities through super-resolution imaging and real-time anatomical modeling.
Implementation Method 1
Besides having a digital imager and LED light source at the distal end
Implementation Method 2
Besides having a digital imager and LED light source at the distal end
Data Source
AI summary
An endoscopy system having a low-profile multi-imager endoscope. The system is capable of using computational photography to provide enhanced output images using techniques such as super-resolution, foveation, magnification, and two-dimensional to three-dimensional conversion. The enhanced output images can improve clinical decision making and patient treatment. Signals from multiple imagers may be used to affect/adjust handing characteristics of the endoscope or direct semi-robotic guidance thereof.