UKE Microscopy Imaging Facility (DFG Research Infrastructure Portal: RI_00489)


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Schaefer-Tec Tomocube Webinar
Thursday 14 September 2023, 03:00pm
Contact a.failla{at}

Label-free technology for 3D live cell imaging at scale

Holotomography (HT) allows for the imaging of cells and cellular organelles in 3D without the use of intrusive dyes or labelling. This novel technique prevents the perturbation of the cell physiology or morphology which in turn provides a true picture of the cell and its functionality. Label free, live cell imaging with quantitative measurement allows accurate 3D measurement of cell morphology, cellular interactions, and cellular kinetics.

HT utilises the intrinsic properties of light as it travels through small objects where the light is refracted and retarded. These small changes can be detected and measured such that the refractive index of small voxels within a given volume can be measured. By applying false colour to different bands of refractive index, the structure of the cell can be highlighted in 3D without the use of exogenous labels.

Subcellular compartments can then be segmented, and their refractive index used to calculate the amount of material present in these cellular and sub cellular structures.

Because the amount of light used is so low HT has no phototoxic effects, unlike Fluorescence microscopy where firstly you label and then you irradiate the sample with strong light. Using HT cells can be observed in their native state for long periods of time, allowing observations of changes in morphology, as well as providing quantitative data of the dry mass of the cells and their internal structures therefore allowing kinetic studies to be conducted.

Latest instruments also provide the option for correlative HT with 3D Fluorescence as well as imaging in a variety of vessels and muti well plates, allowing for large volumes of data to be captured for statistical analysis.
Our seminar will discuss the technical aspects of how holotomography works, its advantages and its limitations. We will illustrate showing examples of what is possible. There will be time for further discussion at the end of the seminar.

More specific information on Tomocubes HT solutions can be obtained after the seminar by contacting This email address is being protected from spambots. You need JavaScript enabled to view it., This email address is being protected from spambots. You need JavaScript enabled to view it..

Schaefer Tec webinar

Location Online workshop

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