Optical Matrix Layer Characterization for Cryo-EM Sample Quality
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Solution Overview
Problem
Preparing biological samples for charged particle microscopy is time-consuming and labor-intensive, with challenges in reproducibility and quality control, particularly in the blotting step and vitrification process, leading to waste of valuable resources due to unpredictable sample quality only visible after examination.
Innovation Solution
A device comprising a light source and detector system that directly illuminates and analyzes the sample's matrix layer, allowing for real-time determination of properties such as thickness and contamination, enabling qualitative and quantitative evaluation and reducing the need for extensive sample preparation time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional sample preparation methods are used, then samples can be prepared for charged particle microscopy, but the process is time-consuming and labor-intensive with unpredictable quality
Solution Approach 1:
The patent applies preliminary action by performing optical characterization of the matrix layer immediately after sample preparation but before microscopy examination. This intermediate step allows early detection of sample quality issues, enabling timely decisions about whether to proceed with microscopy or reprepare the sample, thus reducing wasted time on unsuccessful preparations
Solution Approach 2:
The patent implements feedback by using optical detection methods to characterize matrix layer properties (thickness, homogeneity, contamination) and using this information to evaluate sample quality. This feedback loop allows operators to adjust preparation parameters or identify problematic samples before committing valuable microscopy time, improving overall preparation efficiency
2Reliability
If extensive sample preparation is performed, then sample quality may be improved, but resource wastage occurs when sample quality is still unsuitable for microscopy
Solution Approach 1:
The patent performs preliminary optical characterization to assess matrix layer quality before microscopy examination. This early evaluation identifies samples with thickness or contamination issues that would be unsuitable for microscopy, allowing operators to discard or reprepare only those specific samples rather than wasting valuable microscopy time on doomed preparations
Solution Approach 2:
The optical detection system provides feedback on matrix layer properties, enabling operators to make informed decisions about sample suitability. This feedback mechanism prevents resource wastage by identifying problematic samples early in the preparation process rather than after costly microscopy examination
3Productivity
If optical detection is used to analyze matrix layer properties, then sample quality can be assessed rapidly, but additional equipment and complexity are introduced
Solution Approach 1:
The patent uses optical detection as an intermediary method to assess matrix layer properties without requiring direct microscopy examination. This intermediate optical characterization step provides rapid quality assessment using relatively simple optical equipment, avoiding the need for complex microscopy setup while still enabling effective sample evaluation
Solution Approach 2:
The patent replaces complex mechanical/microscopy-based sample examination with simpler optical detection methods. By using light-based characterization to assess matrix layer properties, the system achieves rapid assessment without the time and complexity constraints of preparing and executing full microscopy examinations on every sample
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 rapid and efficient assessment of sample quality, identifying suitable areas for data collection and reducing resource wastage by providing a direct method to evaluate matrix layer properties during preparation, thereby optimizing sample preparation and microscope usage.
Implementation Method 1
a light source arranged for directing a beam of light towards said sample; a detector arranged for detecting light emitted from said sample in response to said beam of light being incident on said sample
Data Source
AI summary
The invention relates to a device and method for determining a property of a sample that is to be used in a charged particle microscope. The sample comprises a specimen embedded within a matrix layer. The device comprises a light source arranged for directing a beam of light towards said sample, and a detector arranged for detecting light emitted from said sample in response to said beam of light being incident on said sample. Finally, the device comprises a controller that is connected to said detector and arranged for determining a property of said matrix layer based on signals received by said detector.