Microbial Colony Differentiation via Multi-Illumination Imaging
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Solution Overview
Problem
Current automated systems for counting microbial colonies in culture devices face challenges in accurately distinguishing between different types of colonies, especially when indicator compounds produce similar color products, leading to errors in colony enumeration.
Innovation Solution
A method utilizing a biological scanning system that generates images of culture devices with varying illumination ratios to differentiate microbial colonies based on their reactions with multiple indicator compounds, applying image processing rules to accurately count and identify colony types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated image processing is used to count microbial colonies, then productivity is improved, but measurement precision deteriorates due to inability to distinguish similar-colored colonies
Solution Approach 1:
The patent segments the colony identification process into multiple stages: initial automated detection of all colonies, followed by secondary analysis using multiple imaging modalities (transmitted light, reflected light, fluorescence) to differentiate colony types. This segmentation allows high-speed automated counting while maintaining precision through targeted additional imaging only when needed.
Solution Approach 2:
The patent introduces intermediary imaging techniques between the initial detection and final classification. Multiple indicator compounds with different optical properties act as intermediaries that reveal colony type information without interfering with the automated counting process. The system uses these intermediary signals to resolve ambiguities in colony differentiation.
2Measurement precision
If multiple indicator compounds are used to differentiate colony types, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent employs a multi-functional imaging system where a single imaging device can operate in multiple modes (transmitted light imaging, reflected light imaging, fluorescence imaging) by changing illumination and detection configurations. This universality allows the system to extract multiple types of information from the same sample without requiring separate specialized devices for each imaging modality.
Solution Approach 2:
The imaging system is designed to be dynamic, allowing real-time switching between different imaging modes based on the specific differentiation needs. The system can adaptively select which imaging modality to use for each colony or group of colonies, optimizing the balance between precision and complexity for each specific measurement task.
3Device complexity
If traditional single-illumination imaging is used, then device complexity is reduced, but measurement precision deteriorates due to inability to distinguish colonies with similar color products
Solution Approach 1:
The patent transitions from single-illumination imaging to multi-dimensional imaging by incorporating multiple indicator compounds that respond to different illumination types (transmitted light, reflected light, fluorescence). This adds dimensional information about colony biochemical properties, enabling differentiation of colonies with similar appearances under conventional imaging while maintaining relatively simple device architecture.
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
Improves the accuracy of automated colony counting by effectively distinguishing between different microorganism types and sizes, even when products from indicator compounds appear similar in color, enhancing the reliability of microbial analysis.
Implementation Method 1
the first indicator compound is converted by microorganisms in a first group of microorganisms and microorganisms in a second group of microorganisms to a non-water diffusible first product having a first color; wherein the second indicator compound is converted by the microorganisms in the second group of microorganisms to a water-diffusible second product that forms a second color
Implementation Method 2
obtain a first image of the thin film culture device, wherein the first image is produced while providing illumination to the front side of the device; obtain a second image of the thin film culture device, wherein the second image is produced while providing illumination to the back side of the device
Data Source
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AI summary
A method of identifying microbial colonies in a culture device is provided. The method comprises using an imaging device to produce a first image of a thin film culture device while providing illumination to a front side of the device and to produce a second image of the thin film culture device while providing illumination to a back side of the device. The method further comprises analyzing the first and second images to identify microorganism colonies in each image, analyzing the first and second images values of a size parameter for a colony at a particular location in the culture device, and comparing the values. The method can be used to differentiate and count at least two colony types.