Optical matrix imaging applied to embryology - Sorbonne Université
Pré-Publication, Document De Travail Année : 2024

Optical matrix imaging applied to embryology

Résumé

High-resolution label-free imaging of oocytes and embryos is essential for in vitro fertilization procedures. Yet conventional microscopy fails in this task because of aberrations and multiple scattering induced by refractive index heterogeneities inside the sample. These detrimental phenomena drastically degrade the images of early embryos particularly in depth. To overcome these fundamental problems without sacrificing the frame rate, optical matrix imaging (OMI) is a suitable tool. Relying on an ultra-fast measurement of the reflection matrix associated with the sample, it can compensate for aberration and forward multiple scattering in post-processing, thereby providing threedimensional and highly contrasted images of embryos at a confocal resolution. As a first proof-of-concept, bovine oocytes and embryos are imaged at a 300 nm resolution almost in real time. Our system enables visualization of intracellular structures such as lipids and mitochondria in the cytoplasm or the zona pellucida surrounding it. Altogether, we demonstrate that OMI is a promising tool for research in developmental biology and for time-lapse monitoring of oocytes and embryos in assisted reproduction.
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Dates et versions

hal-04736507 , version 1 (15-10-2024)

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  • HAL Id : hal-04736507 , version 1

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Victor Barolle, Flavien Bureau, Nicolas Guigui, Paul Balondrade, Vincent Brochard, et al.. Optical matrix imaging applied to embryology. 2024. ⟨hal-04736507⟩
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