Smoothness correction for better SOFI imaging

Siewert Hugelier, Wim Vandenberg, Tomáš Lukeš, Kristin S. Grußmayer, Paul H.C. Eilers, Peter Dedecker, Cyril Ruckebusch

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Sub-diffraction or super-resolution fluorescence imaging allows the visualization of the cellular morphology and interactions at the nanoscale. Statistical analysis methods such as super-resolution optical fluctuation imaging (SOFI) obtain an improved spatial resolution by analyzing fluorophore blinking but can be perturbed by the presence of non-stationary processes such as photodestruction or fluctuations in the illumination. In this work, we propose to use Whittaker smoothing to remove these smooth signal trends and retain only the information associated to independent blinking of the emitters, thus enhancing the SOFI signals. We find that our method works well to correct photodestruction, especially when it occurs quickly. The resulting images show a much higher contrast, strongly suppressed background and a more detailed visualization of cellular structures. Our method is parameter-free and computationally efficient, and can be readily applied on both two-dimensional and three-dimensional data.

Original languageEnglish
Article number7569
Number of pages9
JournalScientific Reports
Volume11
Issue number1
DOIs
Publication statusPublished - 2021

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