Results 51 to 60 of about 107,717 (203)

Research progress on the use of the optical coherence tomography system for the diagnosis and treatment of central nervous system tumors

Ibrain, Volume 11, Issue 1, Page 3-18, Spring 2025.
With the advantages of high‐resolution imaging, efficient image acquisition, intraoperative real‐time detection, and radiation‐free and noninvasive characteristics, optical coherence tomography (OCT) provides accurate diagnosis and effective intraoperative guidance for the minimally invasive diagnosis and treatment of central nervous system (CNS ...
Jiuhong Li, Ziba Ayi, Gonggong Lu, Haibo Rao, Feilong Yang, Jing Li, Jiachen Sun, Junlin Lu, Xulin Hu, Si Zhang, Xuhui Hui   +10 more
wiley   +1 more source

Multi-Modal X-ray Imaging and Analysis for Characterization of Urinary Stones

Applied Sciences, 2022
Backgound: The composition of stones formed in the urinary tract plays an important role in their management over time. The most common imaging method for the non-invasive evaluation of urinary stones is radiography and computed tomography (CT). However,
Somayeh Saghamanesh, Henning Richter, Antonia Neels, Robert Zboray   +3 more
doaj   +1 more source

Invariance Properties and Measurement of Correlation Between Two Propagating or Evanescent Waves

Laser &Photonics Reviews, EarlyView.
This work analyses the strength of correlation between two propagating or evanescent plane waves generally expressed in different frames. Interferometric and nanoscattering‐based methods, respectively, are demonstrated for their measurement. The results show that the applied measure of correlation remains invariant under unitary polarization ...
Zhen Dong, Kimmo Saastamoinen, Andreas Norrman, Yahong Chen, Ari T. Friberg, Tero Setälä   +5 more
wiley   +1 more source

Nearly a decade of groundbreaking speckle interferometry at the international Gemini observatory

Frontiers in Astronomy and Space Sciences
Since its inception, speckle interferometry has revolutionized high-resolution astronomical imaging, overcoming atmospheric challenges to achieve the diffraction limits of telescopes. Almost a decade ago, in 2018, a pair of speckle cameras – ‘Alopeke and
Steve B. Howell, Clara E. Martínez-Vázquez, Elise Furlan, Nicholas J. Scott, Rachel A. Matson, Colin Littlefield, Colin Littlefield, Catherine A. Clark, Kathryn V. Lester, Zachary D. Hartman, David R. Ciardi, Sarah J. Deveny, Sarah J. Deveny   +12 more
doaj   +1 more source

Convolutional neural network optimisation to enhance ESPI fringe visibility

Journal of the European Optical Society-Rapid Publications, 2023
The use of convolutional neuronal networks (CNN) for the treatment of interferometric fringes has been introduced in recent years. In this paper, we optimize and build a CNN model, based U-NET architecture, to maximize its performance processing ...
Crespo José Manuel, Moreno Vicente
doaj   +1 more source

Transcending the Space‐Bandwidth and Lighting Trade‐Offs: A Programmable Self‐Mixing Interferometry Imager for Cross‐Scale Surface Inspection

Laser &Photonics Reviews, EarlyView.
This work reports a laser diode‐based self‐mixing interferometry imager featuring illumination‐invariance imaging, a 500 kHz pixel rate, and an 8.77 µm lateral resolution. It also features a programmable field‐of‐view and leading space‐bandwidth product that surpasses existing technologies by an order of magnitude, enabling cross‐scale workflow ...
Zhou Su, Feng Lin, Mubasher Ali, Yuanfu Tan, Wei‐Hsin Liao, Hay Wong   +5 more
wiley   +1 more source

Nonlocal Leaky Mode Metasurfaces for Mode‐, Angle‐, and Polarization‐Multiplexed Holography With Thermal Light

Laser &Photonics Reviews, EarlyView.
Nonlocal leaky mode metasurfaces reconstruct multiplexed holograms directly from unfiltered thermal light. High‐Q leaky guided modes compress broadband halogen emission into narrowband channels, enhancing temporal coherence a hundredfold, while a single nanohole array encodes independent images addressed by mode, angle, and polarization, establishing ...
Rajat Kumar Sinha, Mo Mojahedi
wiley   +1 more source

Investigation of Wavelength Scanning Interferometry for Embedded Metrology [PDF]

The tremendous growth in the manufacture of a wide range of deterministic and complex free form surfaces, has made surface metrology an essential part of the manufacturing process.
Muhamedsalih, Hussam
core   +3 more sources

Cell‐Based Micro/Nanorobots: From Living Carriers to Living Therapeutic Specialists

SmartBot, EarlyView.
Cell‐based micro/nanorobots integrate evolutionarily acquired biological intelligence with engineered capabilities, offering new opportunities for precision medicine in vivo. However, the complex physiological environments of different organs pose significant challenges to their clinical translation.
Junfeng Wu, Zhaoyu Zhang, Ke Xu, Enkuo Li, Yuting Cui, Yuting Zhou, Huanyu Zhou, Beipei Zhang, Shuai Jiang, Xiaodong Wang, Jialin Jiang, Lianqing Liu, Niandong Jiao   +12 more
wiley   +1 more source

Identification of invisible damage in prestressed concrete bridges—A demonstrator case using coda wave interferometry

Structural Concrete, EarlyView.
Abstract During their life cycle, prestressed concrete bridges are prone to wire breaks of their tendons due to fatigue or stress corrosion cracking. However, not all structures show visible cracking on the surface, which would provide timely warning of otherwise invisible damage. Brittle failure may occur.
Noah Sträter, Felix Clauß, Mark Alexander Ahrens, Peter Mark   +3 more
wiley   +1 more source