Automated IHC Staining Quality Assessment Using Machine Learning Classifiers
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Solution Overview
Problem
Current methods for assessing the quality of immunohistochemical (IHC) tissue staining are labor-intensive and prone to subjective errors, lacking the ability to accurately identify optimal staining parameters and requiring reference staining from standardized laboratories, which can lead to erroneous medical diagnoses.
Innovation Solution
An automated image analysis method that uses machine learning classifiers to determine the staining quality of IHC-stained tissues by identifying extended tissue types and contrast levels from digital images, allowing for the computation of a staining quality score and the identification of suitable staining parameter ranges without the need for a reference laboratory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual evaluation by pathologists is used to assess staining quality, then diagnostic experience and training can be applied, but the process becomes labor-intensive and prone to subjective variability
Solution Approach 1:
The patent replaces the manual mechanical evaluation process with an automated digital image analysis system. The system extracts features from digital images of stained tissue sections and uses machine learning classifiers to objectively assess staining quality, substituting the pathologist's manual visual inspection with an automated computational system that eliminates subjectivity while maintaining diagnostic accuracy.
Solution Approach 2:
The patent implements a self-assessment mechanism where the digital image analysis system automatically evaluates its own staining quality without requiring external reference samples from standardized laboratories. The system uses trained classifiers that have learned optimal staining characteristics, enabling autonomous quality determination that improves both efficiency and consistency.
2Reliability
If reference staining from standardized laboratories is used to assess quality, then objective comparison is possible, but the process becomes complex and time-consuming
Solution Approach 1:
The patent creates a digital copy of optimal staining characteristics through trained machine learning classifiers. Instead of requiring physical reference samples from standardized laboratories, the system learns from training datasets the ideal staining patterns and uses these learned models to assess new samples. This digital copying approach maintains reliability while eliminating the complexity of physical reference sample management and comparison.
Solution Approach 2:
The patent transforms the assessment approach by changing from physical parameter comparison (visual inspection of reference samples) to computational parameter analysis. The system extracts multiple numerical features from digital images and uses these parameters for automated classification, simplifying the assessment process while improving objectivity and reliability.
3Productivity
If wrong staining parameters are used, then staining speed can be increased, but the result is understained or overstained tissues leading to false diagnoses
Solution Approach 1:
The patent implements a feedback mechanism where the digital image analysis system evaluates the staining quality of processed tissue sections and provides objective quality scores. This feedback loop allows for real-time assessment of whether staining parameters produced acceptable results, enabling rapid identification of suboptimal staining without compromising diagnostic accuracy. The system can flag understained or overstained samples for reprocessing.
Solution Approach 2:
The patent applies preliminary action by using trained classifiers that have already learned optimal staining characteristics from extensive training datasets. These pre-trained models can quickly assess new samples using established criteria, enabling fast evaluation without requiring complex real-time analysis or reference sample comparison, thus maintaining both speed and reliability.
Data Source
AI summary
The invention relates to the automated determination of the staining quality of an IHC stained biological sample. A plurality of features is extracted from a digital IHC stained tissue image. The features are input into a first classifier configured to identify the extended tissue type of the depicted tissue as a function of the extracted features. An extended tissue type is a tissue type with a defined expression level of the tumor marker. In addition, the extracted features are input into a second classifier configured to identify a contrast level of the depicted tissue as a function of at least some second ones of the extracted features. The contrast level indicates the intensity contrast of pixels of the stained tissue. Then, a staining quality score of the image is computed as a function of the identified extended tissue type and the identified contrast level.


