Multispectral Medical Imaging with Filter-Crossover Wavelength Capture
Find Innovative SolutionsGenerate Solutions
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 having emitters with wavelengths near the intersection of filter curves, allowing simultaneous activation of multiple wavelengths to enhance spectral support sites, and a data processing system to separately record and evaluate color signals for multispectral analysis, enabling high-resolution physiological parameter display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple spectral exposure patterns are activated sequentially to increase spectral support sites, then the number of spectral support sites is improved, but the frame rate of physiological parameter display is reduced
Solution Approach 1:
The light source is activated in periodic cycles, switching between different spectral exposure patterns (e.g., first, second, third patterns with different wavelength combinations) in sequence. This periodic activation allows the system to capture multiple spectral wavelengths over time while maintaining continuous imaging capability, resolving the contradiction between spectral resolution and frame rate by distributing spectral measurements across multiple periodic cycles rather than requiring all wavelengths simultaneously
Solution Approach 2:
The spectral measurement process is segmented into multiple exposure patterns, where each pattern captures a specific subset of wavelengths (e.g., first pattern: 480nm, 532nm, 633nm; second pattern: 405nm, 480nm, 532nm, 633nm; third pattern: 405nm, 480nm, 532nm). This segmentation allows the camera to capture spectral information in discrete, manageable steps across multiple frames, enabling both high spectral resolution through multiple wavelength measurements and maintained frame rate through efficient sequential processing
2Measurement precision
If multiple wavelengths are activated simultaneously to increase spectral support sites, then the number of spectral support sites is improved, but the device complexity increases
Solution Approach 1:
A single light source unit is designed with multi-functionality, incorporating multiple LEDs of different wavelengths (violet 405nm, blue 480nm, green 532nm, red 633nm) that can be selectively activated through a unified control system. This universal light source design allows the system to achieve high spectral resolution by combining multiple wavelengths without requiring separate illumination systems for each wavelength, thereby reducing overall device complexity while maintaining spectral measurement capability
3Productivity
If sequential activation of spectral exposure patterns is used to maintain frame rate, then the frame rate is improved, but the number of spectral support sites is reduced
Solution Approach 1:
The system performs preliminary spectral measurements by activating different wavelength combinations in sequential exposure patterns before final physiological parameter calculation. Multiple spectral exposure patterns (first, second, third patterns with varying wavelength sets) are captured in advance and stored as reference data, allowing the system to maintain high frame rates through rapid sequential processing while preserving comprehensive spectral information for accurate physiological parameter derivation
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 a high frame rate for physiological parameter display while maintaining spectral resolution, allowing for accurate determination of parameters like oxygen saturation and tissue composition with improved time resolution.
Implementation Method 1
a light source (3) having a plurality of optical emitters with different wavelengths distributed over the visible and NIR spectral range
Implementation Method 2
an RGB camera sensor (4) for recording the examination area, which generates red, green and blue colour signals using filters with red, green and blue filter curves
Implementation Method 3
generates red, green and blue colour signals using filters with red, green and blue filter curves
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.