English
Related papers

Related papers: Fish embryo multimodal imaging by laser Doppler di…

200 papers

High-speed digital holography reveals local blood flow contrasts in the eye fundus through deterministic signal analysis, leveraging a forward scattering model of dynamically diffused light. This approach enables the estimation of absolute…

Instrumentation and Detectors · Physics 2025-05-14 Zacharie Auray , Yann Fischer , Olivier Martinache , Michael Atlan

This work introduces a co-capture system for multi-animal visual data acquisition using conventional cameras and event cameras. Event cameras offer multiple advantages over frame-based cameras, such as a high temporal resolution and…

Computer Vision and Pattern Recognition · Computer Science 2022-11-23 Friedhelm Hamann , Guillermo Gallego

Multiphoton microscopy is widely used for live imaging. However, its acquisition speed remains limited by fluorophore emission rates and photodamage. To increase the pixel rate of a two-photon microscope beyond a few megahertz (MHz),…

Fish embryo models are increasingly being used both for the assessment of chemicals efficacy and potential toxicity. This article proposes a methodology to automatically detect the swim bladder on 2D images of Medaka fish embryos seen…

Computer Vision and Pattern Recognition · Computer Science 2019-02-19 Diane Genest , Marc Léonard , Jean Cousty , Noémie De Crozé , Hugues Talbot

Laser Doppler holography is a planar blood flow imaging technique recently introduced in ophthalmology to image human retinal and choroidal blood flow non-invasively. Here we present a digital method based on the Doppler spectrum asymmetry…

Medical Physics · Physics 2021-08-10 Léo Puyo , Michel Paques , Michael Atlan

The performance of light-field microscopy is improved by selectively illuminating the relevant subvolume of the specimen with a second objective lens [1-3]. Here we advance this approach to a single-objective geometry, using an oblique…

Non-extractive fish abundance estimation with the aid of visual analysis has drawn increasing attention. Unstable illumination, ubiquitous noise and low frame rate video capturing in the underwater environment, however, make conventional…

Computer Vision and Pattern Recognition · Computer Science 2015-04-16 Meng-Che Chuang , Jenq-Neng Hwang , Kresimir Williams , Richard Towler

We report a pilot study with a wide-field laser Doppler detection scheme used to perform laser Doppler anemometry and imaging of particle seeded microflow. The optical field carrying the local scatterers (particles) dynamic state, as a…

Optics · Physics 2013-12-24 Michel Gross , Michael Atlan , Jacques Leng

A comprehensive assessment of retinal health demands reliable and precise methods to measure localized blood perfusion. Despite considerable advancements in imaging techniques, such as indocyanine green and fluorescein angiography, along…

Medical Physics · Physics 2024-03-15 Michael Atlan

Medical ultrasound (US) is widely used to evaluate and stage vascular diseases, in particular for the preliminary screening program, due to the advantage of being radiation-free. However, automatic segmentation of small tubular structures…

Computer Vision and Pattern Recognition · Computer Science 2023-05-17 Zhongliang Jiang , Felix Duelmer , Nassir Navab

For decades since the development of phase-contrast optical microscopy, an analogous approach has been sought for maximizing the image contrast of weakly-scattering objects in transmission electron microscopy (TEM). The recent development…

The eye offers a unique opportunity for non-invasive exploration of cardiovascular diseases. Optical angiography in the retina requires sensitive measurements, which hinders conventional full-field laser Doppler imaging schemes. To overcome…

Medical Physics · Physics 2018-09-18 L. Puyo , M. Paques , M. Fink , J. -A. Sahel , M. Atlan

Examination of the umbilical artery with Doppler ultrasonography is performed to investigate blood supply to the fetus through the umbilical cord, which is vital for the monitoring of fetal health. Such examination involves several steps…

Fast confocal imaging was achieved by combining remote focusing with differential spinning disk optical sectioning to rapidly acquire images of live samples at cellular resolution. Axial and lateral full width half maxima less than 5 um and…

I review the method of Doppler tomography which translates binary-star line profiles taken at a series of orbital phases into a distribution of emission over the binary. I begin with a discussion of the basic principles behind Doppler…

Astrophysics · Physics 2007-05-23 T. R. Marsh

Vascular networks can provide invaluable information about tumor angiogenesis. Ultrafast Doppler imaging enables ultrasound to image micro-vessels by applying tissue clutter filtering methods on the Spatio-temporal data obtained from…

Medical Physics · Physics 2021-01-08 Saba Adabi , Siavash Ghavami , Mostafa Fatemi , Azra Alizad

Live fish recognition is one of the most crucial elements of fisheries survey applications where vast amount of data are rapidly acquired. Different from general scenarios, challenges to underwater image recognition are posted by poor image…

Computer Vision and Pattern Recognition · Computer Science 2016-03-08 Meng-Che Chuang , Jenq-Neng Hwang , Kresimir Williams

In this work we present a novel publicly available stereo based 3D RGB dataset for multi-object zebrafish tracking, called 3D-ZeF. Zebrafish is an increasingly popular model organism used for studying neurological disorders, drug addiction,…

Computer Vision and Pattern Recognition · Computer Science 2020-06-16 Malte Pedersen , Joakim Bruslund Haurum , Stefan Hein Bengtson , Thomas B. Moeslund

Light-sheet fluorescence microscopy (LSFM) makes use of a thin plane of light to optically section and image transparent tissues or organisms {\it{in vivo}}, which has the advantages of fast imaging speed and low phototoxicity. In this…

Biological Physics · Physics 2022-09-12 Hong Ye , Xin Xu , Jixiang Wang , Jing Wang , Yi He , Yu Mu , Guohua Shi

A lateral shear interferometer based digital holographic microscopy has been realized to study the morphology dynamics of Human red blood cells quantitatively. Here, a lateral shear interferometer is embedded with a conventional microscope…

Image and Video Processing · Electrical Eng. & Systems 2019-09-10 Shital Devinder , Ashish Lal , Tathagato Rai Dastidar , Satish Kumar Dubey