Cell Growth Assessment Using Segmentation Maps for Clone Screening
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Solution Overview
Problem
The process of assessing cell line growth rates is labor-intensive and time-consuming due to the manual review of microscopic images, particularly when evaluating hundreds or thousands of potential clones for suitability in commercial applications, which requires precise cell counting and growth profiling.
Innovation Solution
Implementing a modified fully convolutional neural network (FCN) to automate the growth assessment process by generating down-sampled segmentation maps, combined with a fully convolutional regression network (FCRN) for early-stage cell counting, to analyze well images and provide growth scores or classifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual visual inspection techniques are used to assess cell growth rates, then measurement precision is maintained, but productivity is significantly reduced and loss of time increases
Solution Approach 1:
The patent replaces the manual mechanical visual inspection process with an automated image analysis system using machine learning algorithms. The system captures images of cell cultures and uses trained neural networks to automatically detect, segment, and count cells, substituting human analysts with computational algorithms that process images rapidly and consistently.
Solution Approach 2:
The patent introduces an intermediary layer of automated image processing and machine learning models between the raw well images and the final growth assessment. This intermediary system includes preprocessing steps, cell detection algorithms, segmentation networks, and counting mechanisms that translate visual data into quantitative growth metrics without direct human intervention.
2Productivity
If automated visual inspection is implemented, then productivity is improved, but measurement precision deteriorates due to difficulties in counting dense cell colonies
Solution Approach 1:
The patent employs segmentation techniques to divide the image processing task into distinct stages: initial cell detection, individual cell segmentation from the background and from each other, and final counting. By breaking down the complex task of counting dense colonies into manageable segmentation steps, the system maintains accuracy even when cells are tightly packed together.
Solution Approach 2:
The patent applies partial action by focusing the automated system on specific measurable outcomes (colony presence, relative growth trends) rather than attempting perfect individual cell counting in all scenarios. For dense colonies where precise counting is extremely difficult, the system uses alternative metrics such as colony area measurement or presence/absence detection, which remain accurate even when individual cell boundaries are indistinct.
3Productivity
If traditional automated image analysis is used, then productivity is improved, but device complexity increases due to the need for training libraries and manual annotation
Solution Approach 1:
The patent implements self-service mechanisms where the system automatically performs tasks that would otherwise require manual intervention. The automated annotation feature allows the system to generate training data by having users review and correct only the most uncertain predictions, rather than requiring manual annotation of every training image. This self-correcting approach significantly reduces the labor intensity of creating training libraries.
Solution Approach 2:
The patent incorporates feedback loops where the automated analysis system continuously learns from user corrections and validation. User interactions with the system provide feedback that refines the machine learning models over time, improving accuracy while reducing the initial burden of training library creation. The system adapts to specific laboratory conditions and cell types based on this feedback.
Data Source
AI summary
A method of facilitating a growth assessment for a cell line includes generating an image of a well that contains a medium that was inoculated with at least one cell of the cell line. The method also includes generating a down-sampled segmentation map comprising pixels that indicate an inferred presence or absence of a cell colony in corresponding portions of the well image. Generating the down-sampled segmentation map includes inputting the well image to a fully convolutional neural network having a plurality of convolutional layers. The method also includes (i) determining, by inputting colony size information (including the down-sampled segmentation map and/or a pixel count derived therefrom) to a cell growth assessment algorithm, a growth classification or score for the cell line, and causing a display of the growth classification or score, and/or (II) causing a display of the colony size information to facilitate a manual cell growth assessment.


