Spatial Multispectral Imaging With RGB Filter-Intersection Emitters
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Solution Overview
Problem
Existing medical imaging devices for multispectral analysis reduce the frame rate of physiological parameter display, limiting the number of spectral support sites and compromising time resolution in multispectral analysis.
Innovation Solution
A medical imaging device with a light source using emitters with wavelengths close to the intersection points of RGB filter curves, allowing simultaneous activation of multiple emitters to capture multiple spectral support points, and a data processing system to separate and analyze color signals, enabling high-resolution spatially resolved multispectral analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple emitters with different wavelengths are activated sequentially in an activation sequence, then spectral support sites are provided for multispectral analysis, but the frame rate of physiological parameter display is reduced
Solution Approach 1:
The patent employs periodic action by activating multiple emitters with different wavelengths in a sequential activation sequence. Each emitter is activated in turn during successive activation sequences, allowing the system to capture spectral information at multiple support sites while maintaining a high frame rate for physiological parameter display through synchronized periodic illumination and detection cycles.
2Measurement precision
If emitters with wavelengths close to intersection points of RGB filter curves are used, then multiple spectral support points can be captured simultaneously, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by selecting emitters with specific wavelengths positioned close to the intersection points of RGB filter curves. This parameter optimization allows multiple spectral support points to be captured simultaneously through a single emitter activation, as the emitter wavelength falls within the overlapping spectral response regions of multiple color filters, thereby reducing the need for complex sequential illumination patterns.
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
The device achieves high frame rates for both color video and physiological parameter display, providing detailed spatial and temporal information on physiological parameters like oxygen saturation and tissue composition.
Implementation Method 1
an RGB camera sensor for recording the examination area, which generates red, green and blue colour signals using filters with red, green and blue filter curves
Implementation Method 2
a light source for illuminating the examination area, having a plurality of optical emitters with different wavelengths distributed over the visible and NIR spectral range
Data Source
AI summary
A medical imaging device configured to spatially resolve recording of multispectral video data of an examination area of a patient including a light source having multiple optical emitters with different wavelengths in the visible and NIR spectral range. The light source has an emitter whose wavelength lies in the range of ±50% of its half-width around the intersection of the blue and green filter curves or the green and red filter curves, and the exposure control and the data processing means are arranged to separately detect the affected two of the red and green or the green and blue colour signals in an exposure pattern with activation of the emitter at the intersection point and to evaluate them in the multispectral analysis with mutually different wavelengths shifted by the two affected filter curves as two supporting point wavelengths.