Publications by Theo Lasser | EPFL Graph Search

Open-source microscope add-on for structured illumination microscopy

Matthias Lütolf, Theo Lasser, Aleksandra Radenovic, John McKinney, Georg Fantner, Olivier François Venzin, Mélanie Thérèse Marie Hannebelle, Tomas Lukes, Samuel Mendes Leitão, Antonius Chrisnandy, Chiara Toniolo, Andrew Charles Oates, Prabhu Prasad Swain, Nathan Cyprien Arsène Ronceray

Super-resolution techniques expand the abilities of researchers who have the knowledge and resources to either build or purchase a system. This excludes the part of the research community without these capabilities. Here we introduce the openSIM add-on to ...

Nature Portfolio2024

Soliton microcomb based spectral domain optical coherence tomography

Theo Lasser, Paul James Marchand, Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Junqiu Liu

Spectral domain optical coherence tomography (OCT) is a widely employed, minimally invasive bio-medical imaging technique, which requires a broadband light source, typically implemented by super-luminescent diodes. Recent advances in soliton based photonic ...

Nature Research2021

High-speed multiplane structured illumination microscopy of living cells using an image-splitting prism

Theo Lasser, Aleksandra Radenovic, Adrien Charles-François Raymond Descloux, Tomas Lukes, Vytautas Navikas

Super-resolution structured illumination microscopy (SR-SIM) can be conducted at video-rate acquisition speeds when combined with high-speed spatial light modulators and sCMOS cameras, rendering it particularly suitable for live-cell imaging. If, however, ...

2020

Self-Blinking Dyes Unlock High-Order and Multiplane Super-Resolution Optical Fluctuation Imaging

Theo Lasser, Aleksandra Radenovic, Tomas Lukes, Kristin Stefanie Grussmayer

Most diffraction-unlimited super-resolution imaging critically depends on the switching of fluorophores between at least two states, often induced using intense laser light and specialized buffers or UV radiation. Recently, so-called self-blinking dyes tha ...

AMER CHEMICAL SOC2020

Spectral cross-cumulants for multicolor super-resolved SOFI imaging

Marcel Leutenegger, Theo Lasser, Aleksandra Radenovic, Adrien Charles-François Raymond Descloux, Tomas Lukes, Kristin Stefanie Grussmayer

Super-resolution opticalfluctuation imaging provides a resolution beyond the diffraction limitby analysing stochasticfluorescencefluctuations with higher-order statistics. Usingnthorderspatio-temporal cross-cumulants the spatial resolution and the sampling ...

Nature Research2020

Identifying microbial species by single-molecule DNA optical mapping and resampling statistics

Theo Lasser, Aleksandra Radenovic, Adrien Charles-François Raymond Descloux, Arno Pino Bouwens, Tomas Lukes, Jochem Deen, Kristin Stefanie Grussmayer

Single-molecule DNA mapping has the potential to serve as a powerful complement to high-throughput sequencing in metagenomic analysis. Offering longer read lengths and forgoing the need for complex library preparation and amplification, mapping stands to p ...

2019

High-Contrast Imaging of Nanodiamonds in Cells by Energy Filtered and Correlative Light-Electron Microscopy: Toward a Quantitative Nanoparticle-Cell Analysis

Theo Lasser

Fluorescent nanodiamonds (fNDs) represent an emerging class of nanomaterials offering great opportunities for ultrahigh resolution imaging, sensing and drug delivery applications. Their biocompatibility, exceptional chemical and consistent photostability r ...

2019

Supervised learning to quantify amyloidosis in whole brains of an Alzheimer's disease mouse model acquired with optical projection tomography

Theo Lasser, Dimitri Nestor Alice Van De Ville, Aleksandra Radenovic, Paul James Marchand, Virginie Sophie Uhlmann, David Nguyen, Arielle Louise Planchette

Alzheimer's disease (AD) is characterized by amyloidosis of brain tissues. This phenomenon is studied with genetically-modified mouse models. We propose a method to quantify amyloidosis in whole 5xFAD mouse brains, a model of AD. We use optical projection ...

2019

Combined Multi-Plane Tomographic Phase Retrieval and Stochastic Optical Fluctuation Imaging for 4D Cell Microscopy

Marcel Leutenegger, Theo Lasser, Hilal Lashuel, Adrien Charles-François Raymond Descloux, Emrah Bostan, Arno Pino Bouwens, Anne-Laure Mahul Mellier, Tomas Lukes

Super-resolution fluorescence microscopy provides unprecedented insight into cellular and subcellular structures. However, going beyond the diffraction barrier comes at a price since most far-field super-resolution imaging techniques trade temporal for spa ...

Nature Publishing Group2018

Imaging of cortical structures and microvasculature using extended-focus optical coherence tomography at 1.3 mu m

Theo Lasser, Paul James Marchand, Damien Nguyen, Arno Pino Bouwens, Daniel Pawel Szlag

2018

In vivo high-resolution cortical imaging with extended-focus optical coherence microscopy in the visible-NIR wavelength range

Theo Lasser, Paul James Marchand, Arno Pino Bouwens, Daniel Pawel Szlag

SPIE Society of Photo-optical Instrumentation Engineers2018

Quantitative super-resolution single molecule microscopy dataset of YFP-tagged growth factor receptors

Theo Lasser, Tomas Lukes, Jakub Pospisil

2018

Reduction of Abeta amyloid pathology in APPPS1 transgenic mice in the absence of gut microbiota

Theo Lasser, Tristan Bolmont, Nicolas Jean Marc Antoine Duthilleul, Taoufiq Harach

Alzheimer’s disease is the most common form of dementia in the western world, however there is no cure available for this devastating neurodegenerative disorder. Despite clinical and experimental evidence implicating the intestinal microbiota in a number o ...

Nature Research2017

Label-free three-dimensional imaging of Caenorhabditis elegans with visible optical coherence microscopy

Theo Lasser, Paul James Marchand, Séverine Coquoz, Johan Auwerx, Arno Pino Bouwens, Laurent Mouchiroud, Daniel Pawel Szlag, Vincenzo Sorrentino

Fast, label-free, high-resolution, three-dimensional imaging platforms are crucial for high-throughput in vivo time-lapse studies of the anatomy of Caenorhabditis elegans, one of the most commonly used model organisms in biomedical research. Despite the ne ...

Public Library of Science2017

Administrations of human adult ischemia-tolerant mesenchymal stem cells and factors reduce amyloid beta pathology in a mouse model of Alzheimer's disease

Theo Lasser, Tristan Bolmont, Nicolas Jean Marc Antoine Duthilleul, Taoufiq Harach, Fabien Louis Claude Robert Jammes, Valentin Laurent Herbert Zufferey

The impact of human adult ischemia-tolerant mesenchymal stem cells (hMSCs) and factors (stem cell factors) on cerebral amyloid beta (Aβ) pathology was investigated in a mouse model of Alzheimer's disease (AD). To this end, hMSCs were administered intraveno ...

Elsevier2017

3D Time-lapse Imaging and Quantification of Mitochondrial Dynamics

Theo Lasser, Antonio Lopez, Paul James Marchand, Jérôme Extermann, Miguel Sison, Amir Jean Nahas

We present a 3D time-lapse imaging method for monitoring mitochondrial dynamics in living HeLa cells based on photothermal optical coherence microscopy and using novel surface functionalization of gold nanoparticles. The biocompatible protein-based biopoly ...

Nature Research2017

Massively parallel data processing for quantitative total flow imaging with optical coherence microscopy and tomography

Theo Lasser, Paul James Marchand, Daniel Pawel Szlag, Marcin Antoni Sylwestrzak

We present an application of massively parallel processing of quantitative flow measurements data acquired using spectral optical coherence microscopy (SOCM). The need for massive signal processing of these particular datasets has been a major hurdle for m ...

Elsevier2017

Visible spectrum extended-focus optical coherence microscopy for label-free sub-cellular tomography

Theo Lasser, Paul James Marchand, Séverine Coquoz, David Nguyen, Adrien Charles-François Raymond Descloux, Arno Pino Bouwens, Daniel Pawel Szlag, Jérôme Extermann, Miguel Sison

We present a novel extended-focus optical coherence microscope (OCM) attaining 0.7 μm axial and 0.4 μm lateral resolution maintained over a depth of 40 μm, while preserving the advantages of Fourier domain OCM. Our system uses an ultra-broad spectrum from ...

2017

Statistical parametric mapping of stimuli evoked changes in total blood flow velocity in the mouse cortex obtained with extended-focus optical coherence microscopy

Theo Lasser, Paul James Marchand, Tristan Bolmont, David Nguyen, Vincent Khashayar Shamaei, Arno Pino Bouwens, Daniel Pawel Szlag, Jérôme Extermann

Functional magnetic resonance (fMRI) imaging is the current gold-standard in neuroimaging. fMRI exploits local changes in blood oxygenation to map neuronal activity over the entire brain. However, its spatial resolution is currently limited to a few hundre ...

Optical Soc Amer2017

Superresolved synthetic aperture microscope

Theo Lasser, Adrien Charles-François Raymond Descloux, Daniel Pawel Szlag, Tomas Lukes

Optical system comprising a synthetic aperture generating unit; said synthetic aperture generating unit being adapted for generating several apertures, which are correlated by interference for improving contrast and/or resolution based on the interference ...

2017