Results 41 to 50 of about 387,608 (286)

High-resolution impedance mapping using electrically activated quantitative phase imaging

Light: Science & Applications, 2021
Microscopy: phased-in approach puts nanoscale electrical impedance on the map A microscope capable of real-time, label-free analysis of nanoscale structures and their associated electrical properties could find applications in both biology and materials ...
Cristina Polonschii, Mihaela Gheorghiu, Sorin David, Szilveszter Gáspár, Sorin Melinte, Hassaan Majeed, Mikhail E. Kandel, Gabriel Popescu, Eugen Gheorghiu   +8 more
doaj   +1 more source

White-light quantitative phase imaging unit

Optics Express, 2016
We introduce the white light quantitative phase imaging unit (WQPIU) as a practical realization of quantitative phase imaging (QPI) on standard microscope platforms. The WQPIU is a compact stand-alone unit which measures sample induced phase delay under white-light illumination.
Baek, YoonSeok, Lee, KyeoReh, Yoon, Jonghee, Kim, Kyoohyun, Park, YongKeun   +4 more
openaire   +4 more sources

An evaluation of prospective motion correction (PMC) for high resolution quantitative MRI. [PDF]

, 2015
Quantitative imaging aims to provide in vivo neuroimaging biomarkers with high research and diagnostic value that are sensitive to underlying tissue microstructure.
Weiskopf, N, Weiskopf, N. ; https://orcid.org/, Josephs, O, Oliver Josephs, Herbst, M, Martina F. Callaghan, Zaitsev, M., Weiskopf, Nikolaus, Michael eHerbst, Martina F Callaghan, Nikolaus eWeiskopf, Zaitsev, M, Todd, N., Nick Todd, Herbst, M., Herbst, Michael, Maxim eZaitsev, Nikolaus Weiskopf, Michael Herbst, Callaghan, M., Nick eTodd, Maxim Zaitsev, Josephs, O., Callaghan, Martina F., Todd, Nick, Callaghan, MF, Josephs, Oliver, Todd, N, Oliver eJosephs, Zaitsev, Maxim   +29 more
core   +1 more source

Quantitative phase imaging with partially coherent illumination [PDF]

Optics Letters, 2014
In this Letter, we formulate a mathematical model for predicting experimental outcomes in quantitative phase imaging (QPI) when the illumination field is partially spatially coherent. We derive formulae that apply to QPI and discuss expected results for two classes of QPI experiments: common path and traditional interferometry, under varying degrees of
T H, Nguyen, C, Edwards, L L, Goddard, G, Popescu   +3 more
openaire   +2 more sources

Common-path diffraction optical tomography with a low-coherence illumination for reducing speckle noise

, 2015
Common-path diffraction optical tomography (cDOT) is a non-invasive and label-free optical holographic technique for measuring both the three-dimensional refractive index (RI) tomograms and two-dimensional dynamic phase images of a sample.
Kim, Young-Jin, Shin, Seungwoo, Youngchan Kim, Kim, Youngchan, Park, Hyun Joo, HyunJoo Park, Park, HyunJoo, Park, Yong Keun, KyeoReh Lee, Park, YongKeun, Young-Jin Kim, Kim, Kyoohyun, Lee, KyeoReh, YongKeun Park, Seungwoo Shin, Kyoohyun Kim   +15 more
core   +1 more source

Rapid magnetic resonance tissue relaxometry in the steady state [PDF]

, 2015
Longitudinal (T1) and transverse (T2) relaxation are the most fundamental physical processes governing the signal intensity and the soft tissue contrast in magnetic resonance imaging (MRI).
Heule, Rahel Maria, Heule, R. ; https://orcid.org/   +1 more
core   +1 more source

Quantitative phase contrast imaging with a nonlocal angle-selective metasurface

Nature Communications, 2022
The authors present an approach to phase imaging by using the non-local optical response of a guided-moderesonator metasurface. They demonstrate that this metasurface can be added to a conventional microscope to enable quantitative phase contrast imaging.
Anqi Ji, Jung-Hwan Song, Qitong Li, Fenghao Xu, Ching-Ting Tsai, Richard C. Tiberio, Bianxiao Cui, Philippe Lalanne, Pieter G. Kik, David A. B. Miller, Mark L. Brongersma   +10 more
doaj   +1 more source

Iterative projection meets sparsity regularization: towards practical single-shot quantitative phase imaging with in-line holography

Light: Advanced Manufacturing, 2023
Holography provides access to the optical phase. The emerging compressive phase retrieval approach can achieve in-line holographic imaging beyond the information-theoretic limit or even from a single shot by exploring the signal priors.
Yunhui Gao, Liangcai Cao
doaj   +1 more source

Quantitative Phase Imaging and Artificial Intelligence: A Review [PDF]

IEEE Journal of Selected Topics in Quantum Electronics, 2019
Recent advances in quantitative phase imaging (QPI) and artificial intelligence (AI) have opened up the possibility of an exciting frontier. The fast and label-free nature of QPI enables the rapid generation of large-scale and uniform-quality imaging data in two, three, and four dimensions.
YoungJu Jo, Hyungjoo Cho, Sang Yun Lee, Gunho Choi, Geon Kim, Hyun-seok Min, YongKeun Park   +6 more
openaire   +2 more sources

Quantitative phase imaging based on polarization encoding

Optics Express, 2022
Most optical characterization methods rely on measuring the complex optical fields emerging from the interaction between light and material systems. Nevertheless, inherent scattering and absorption cause ambiguities in both interferometric and noninterferometric attempts to measure phase.
Shengwei Cui, Shan Gao, Changheng Li, Wei Zhang, X. Steve Yao   +4 more
openaire   +2 more sources