Reflective Multi-Spectral Time-Resolved Optical Imaging for Burn Classification
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Solution Overview
Problem
Current imaging technologies for burn assessment are invasive, time-consuming, or lack accuracy, particularly in classifying partial thickness burns and distinguishing between viable and non-viable tissues, which can lead to delayed treatment and increased complications.
Innovation Solution
The development of non-contact, reflective mode multi-spectral time-resolved optical imaging systems that utilize specific wavelengths to classify burn severity by analyzing light-tissue interactions, combining photoplethysmography (PPG) imaging and multispectral imaging (MSI) to provide rapid and accurate assessment of tissue blood perfusion and reflectance signatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current imaging technologies are used for burn assessment, then the assessment can be performed, but the process is invasive, time-consuming, and lacks accuracy in classifying partial thickness burns
Solution Approach 1:
The patent segments the burn assessment process into multiple spectral bands (e.g., visible, near-infrared, short-wave infrared) that can be independently analyzed. Each spectral band provides specific information about tissue properties, allowing for parallel processing and faster classification without compromising accuracy. The segmentation of spectral information enables simultaneous evaluation of multiple tissue parameters.
Solution Approach 2:
The patent transitions from traditional single-wavelength or limited-band imaging to multi-spectral and hyperspectral imaging, adding spectral dimensionality to the assessment. This dimensional expansion allows differentiation of tissue types (viable vs. non-viable, partial thickness vs. full thickness) based on their unique spectral signatures, significantly improving classification accuracy while maintaining rapid acquisition through modern detector technology.
2Measurement precision
If current imaging technologies are used for burn assessment, then the assessment can be performed, but the process is invasive
Solution Approach 1:
The patent replaces invasive mechanical or surgical procedures with non-invasive optical imaging. Instead of requiring tissue sampling, biopsy, or surgical exploration to assess burn depth and viability, the system uses multi-spectral and hyperspectral imaging to obtain detailed tissue information through non-contact or minimal-contact optical measurement, eliminating the need for invasive intervention.
Solution Approach 2:
The patent introduces optical radiation (light) as an intermediary between the imaging system and the tissue. This intermediary enables information transfer about tissue properties without direct physical contact or invasion. The light interacts with tissue chromophores and structural components, carrying information back to the detector for analysis, thus providing a non-invasive measurement pathway.
3Measurement precision
If multi-spectral and hyperspectral imaging are used, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent employs a multi-functional imaging system that can operate across multiple spectral bands (visible, near-infrared, short-wave infrared) using a single integrated platform. The system incorporates universal components such as broadband light sources, dichroic mirrors for spectral separation, and detectors that can capture multiple wavelength ranges, allowing one device to perform what would otherwise require multiple separate instruments.
Solution Approach 2:
The patent implements a nested spectral imaging architecture where multiple spectral bands are captured and processed within a unified data structure. The imaging system nests different spectral resolutions and bands within a single acquisition framework, allowing hierarchical processing from broad spectral overview to detailed band-specific analysis, thereby managing complexity through structured organization.
4Productivity
If rapid assessment is performed in mass casualty scenarios, then productivity is improved, but measurement precision may be compromised
Solution Approach 1:
The patent implements preliminary action through pre-computed spectral libraries and trained classification algorithms that are prepared in advance. During rapid assessment, the system compares acquired spectral data against these pre-established reference models, enabling instant classification without requiring complex real-time computation. This preliminary preparation allows high-speed processing while maintaining accuracy based on validated reference data.
Solution Approach 2:
The patent utilizes periodic action through pulsed illumination and time-resolved detection schemes. By using short, periodic light pulses and measuring tissue response at specific time intervals, the system achieves rapid data acquisition with high temporal resolution. This periodic measurement approach enables fast assessment while capturing sufficient spectral information for accurate classification through time-gated detection.
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 quick and precise classification of burn severity, facilitating timely treatment decisions and reducing the risk of infection and scarring by providing accurate differentiation between viable and non-viable tissues, even in mass casualty scenarios.
Implementation Method 1
a light source configured to illuminate a tissue region
Implementation Method 2
an image acquisition device configured to receive light reflected from the tissue region
Data Source
AI summary
Certain aspects relate to apparatuses and techniques for non-invasive optical imaging that acquires a plurality of images corresponding to both different times and different frequencies. Additionally, alternatives described herein are used with a variety of tissue classification applications, including assessing the presence and severity of tissue conditions, such as burns and other wounds.