Quality assessment in light microscopy for routine use through simple tools and robust metrics

Area of Science:

• Biophysics
• Optical Microscopy
• Scientific Instrumentation

Background:

• Reproducibility in light microscopy is crucial but hindered by a lack of standardized quality control (QC) guidelines.
• Existing methods for monitoring microscope health over time are not widely adopted.

Purpose of the Study:

• To establish standardized QC protocols and provide accessible tools for fluorescence light microscopy.
• To define reference values for key QC metrics to ensure reproducible imaging.

Main Methods:

• Development of seven rigorous protocols assessing microscope resolution, illumination flatness, chromatic aberrations, power stability, stage drift, positioning repeatability, and camera sensor noise.
• Creation of the MetroloJ_QC ImageJ/Fiji Java plugin for automated analysis of QC metrics.
• Provision of affordable hardware and open-source software solutions.

Main Results:

• Defined comprehensive QC metrics and reference values for common fluorescence microscopy modalities.
• Validated the MetroloJ_QC plugin for automated and efficient QC analysis.
• Demonstrated the feasibility of implementing these QC procedures across diverse imaging projects.

Conclusions:

• The developed protocols and tools facilitate consistent and quantifiable microscopy results.
• Empowers researchers and core facility staff to ensure the reliability of their imaging data.
• Addresses the need for standardized QC in light microscopy for enhanced scientific reproducibility.