HighlightsSRRF is a purely analytical super-resolution microscopy approach available as an open-source easy-to-use plugin for ImageJ.SRRF is compatible with any fluorophore, including conventional fluorescent proteins such as GFP.SRRF can be used to retrieve super-resolution information from most common fluorescence microscopes.
Super-resolution microscopy (SRM) has become essential for the study of nanoscale
biological processes. This type of imaging often requires the use of specialised
image analysis tools to process a large volume of recorded data and extract
quantitative information. In recent years, our team has built an open-source
image analysis framework for SRM designed to combine high performance and ease
of use. We named it NanoJ—a reference to the popular ImageJ software it was
developed for. In this paper, we highlight the current capabilities of NanoJ for
several essential processing steps: spatio-temporal alignment of raw data
(NanoJ-Core), super-resolution image reconstruction (NanoJ-SRRF), image quality
assessment (NanoJ-SQUIRREL), structural modelling (NanoJ-VirusMapper) and
control of the sample environment (NanoJ-Fluidics). We expect to expand NanoJ in
the future through the development of new tools designed to improve quantitative
data analysis and measure the reliability of fluorescent microscopy studies.
Super-resolution microscopy (SRM) enables non-invasive, molecule-specific imaging
of the internal structure and dynamics of cells with sub-diffraction limit
spatial resolution. One of its major limitations is the requirement for
high-intensity illumination, generating considerable cellular phototoxicity.
This factor considerably limits the capacity for live-cell observations,
particularly for extended periods of time. Here, we give an overview of new
developments in hardware, software and probe chemistry aiming to reduce
phototoxicity. Additionally, we discuss how the choice of biological model and
sample environment impacts the capacity for live-cell observations.
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