Endoscope Oxygen Saturation Correction with Disturbance Detection
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Solution Overview
Problem
Existing endoscope systems face challenges in accurately calculating oxygen saturation due to the presence of yellow pigments and disturbances like bleeding or mucus, which can affect the accuracy of the oxygen saturation calculation and make it difficult to perform correction operations.
Innovation Solution
An endoscope system with a processor that switches between oxygen saturation and correction modes, allowing for the display of a correction image and specific region on the display, where correction processing is performed based on the specific pigment concentration, and the display style is adjusted according to the reliability of the calculation, enabling accurate correction even with disturbances present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If correction operation is performed to eliminate yellow pigment influence, then oxygen saturation calculation accuracy is improved, but reliability deteriorates when disturbance (bleeding, residual liquid, adherent) is present in the observation target
Solution Approach 1:
The system performs preliminary assessment of disturbance presence before executing the correction operation. By evaluating whether disturbance (bleeding, residual liquid, adherent) is present in the observation target prior to correction, the system determines whether to proceed with the correction operation, thereby preventing unreliable corrections when disturbance affects the measurement
Solution Approach 2:
The system provides feedback to the user regarding the presence of disturbance and the reliability of the correction operation. This feedback mechanism allows the user to understand the conditions under which correction is being performed and makes informed decisions about whether to proceed with the correction operation
2Measurement precision
If correction operation is performed to calculate yellow pigment concentration, then oxygen saturation calculation accuracy is improved, but device complexity increases due to additional processing requirements
Solution Approach 1:
The system extracts only the necessary image data corresponding to the observation target for correction processing, separating it from other image data. This extraction approach simplifies the processing by focusing only on the relevant regions, reducing the overall computational complexity while maintaining correction accuracy
3Measurement precision
If correction operation is performed to eliminate yellow pigment influence, then oxygen saturation calculation accuracy is improved, but ease of operation deteriorates due to difficulty in performing correction while avoiding disturbance
Solution Approach 1:
The system automatically performs disturbance detection and correction operation selection without requiring manual user intervention. The system serves itself by autonomously assessing the observation target conditions and determining the appropriate correction approach, thereby improving ease of operation while maintaining measurement accuracy
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 users to correctly perform oxygen saturation calculations by highlighting reliable regions and providing guidance on correction operations, improving the accuracy and reliability of oxygen saturation calculations even in the presence of disturbances.
Implementation Method 1
capturing an image of an observation target irradiated with illumination light including a wavelength range in which the absorption coefficient changes in accordance with a change in the oxygen saturation of blood hemoglobin
Implementation Method 2
the specific pigment concentration being calculated based on a specific pigment image signal including image information of a wavelength range having sensitivity to the specific pigment
Data Source
AI summary
In a correction mode, a correction image is displayed on an extension display, and a specific region is displayed on the extension display. In the correction mode, a display style control unit performs at least one of changing a display style of the correction image or changing a display style of the specific region in accordance with reliability related to calculation of the oxygen saturation.