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737 results on '"Fixler, Dror"'

2. Correlated multimodal imaging in life sciences: lessons learnt.

Author

Rudraiah, Pavitra Sokke, Camacho, Rafael, Fernandez-Rodriguez, Julia, Fixler, Dror, Grimm, Jan, Gruber, Florian, Kalaš, Matúš, Kremslehner, Christopher, Kuntner, Claudia, Kuzdas-Wood, Daniela, Lindblad, Joakim, Mannheim, Julia G., Marchetti-Deschmann, Martina, Paul-Gilloteaux, Perrine, Sampaio, Paula, Sandbichler, Peter, Sartori-Rupp, Anna, Sladoje, Nataša, Verkade, Paul, and Walter, Andreas

Subjects
IMAGE databases, MEDICAL scientists, IMAGE registration, LIFE sciences, MICROSCOPY
Abstract

Correlated Multimodal Imaging (CMI) gathers information about the same specimen with two or more modalities that-combined-create a composite and complementary view of the sample (including insights into structure, function, dynamics and molecular composition). CMI allows one to reach beyond what is possible with a single modality and describe biomedical processes within their overall spatio-temporal context and gain a mechanistic understanding of cells, tissues, and organisms in health and disease by untangling their molecular mechanisms within their native environment. The field of CMI has grown substantially over the last decade and previously unanswerable biological questions have been solved by applying novel CMI workflows. To disseminate these workflows and comprehensively share the scattered knowledge present within the CMI community, an initiative was started to bring together imaging, image analysis, and biomedical scientists and work towards an open community that promotes and disseminates the field of CMI. This community project was funded for the last 4 years by an EU COST Action called COMULIS (COrrelated MUltimodal imaging in the LIfe Sciences). In this review we share some of the showcases and lessons learnt from the action. We also briefly look ahead at how we anticipate building on this initial initiative. [ABSTRACT FROM AUTHOR]

Published
2024
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7. Photon Number Splitting Attack – Proposal and Analysis of an Experimental Scheme.

Author

Ashkenazy, Ariel, Idan, Yuval, Korn, Dor, Fixler, Dror, Dayan, Barak, and Cohen, Eliahu

Subjects
PHOTON counting, COHERENT states, ERROR rates, LASER pulses, QUANTUM optics, PHOTONS
Abstract

Photon‐number‐splitting (PNS) is a well‐known theoretical attack on quantum key distribution (QKD) protocols that employ weak coherent states produced by attenuated laser pulses. However, beyond the fact that it has not yet been demonstrated experimentally, its plausibility and effect on quantum bit error rate are questioned. In this work, an experimental scheme is presented for PNS attack employing demonstrated technological capabilities, specifically a single‐photon Raman interaction (SPRINT) in a cavity‐enhanced three‐level atomic system. Several aspects of the proposed implementation are addressed, analytically and simulatively, and the eavesdropper's information gain by the attack is calculated. Furthermore, it is analytically shown that the scheme results in a small (yet non‐zero) quantum bit error rate, and a comparison to purely theoretical analyses in the literature is presented. It is believed that the inherent nonlinearity of the PNS attack unavoidably affects the optical modes sent to the receiver, and accordingly will always result in some error rate. [ABSTRACT FROM AUTHOR]

Published
2024
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20. Gold nanorods based diffusion reflection measurements: current status and perspectives for clinical applications

Author

Ankri Rinat and Fixler Dror

Subjects
gold nanorods, diffusion reflection, optical imaging, tissues’ scattering and absorption properties, Physics, QC1-999
Abstract

Optical imaging is a powerful tool for investigating the structure and function of tissues. Tissue optical imaging technologies are generally discussed under two broad regimes: microscopic and macroscopic, while the latter is widely investigated in the field of light-tissue interaction. Among the developed optical technologies for tissue investigation, the diffusion reflectance (DR) method is a simple and safe technology. However, this method suffers from low specificity and low signal-to-noise ratio, so the extraction of the tissue properties is not an easy task. In this review, we describe the use of gold nanorods (GNRs) in DR spectroscopy. The GNRs present unique optical properties which enhance the scattering and absorption properties of a tissue. The GNRs can be easily targeted toward abnormal sites in order to improve the DR signal and to distinguish between the healthy and the abnormal sites in the tissue, with high specificity. This article describes the use of the DR-GNRs method for the detection of cancer and atherosclerosis, from light transfer theory, through the extraction of the tissue properties using the diffusion theory and up to DR in vivo measurements.

Published
2017
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