Results 51 to 60 of about 6,108,061 (222)

3D B-mode ultrasound speckle reduction using deep learning for 3D registration applications [PDF]

arXiv, 2020
Ultrasound (US) speckles are granular patterns which can impede image post-processing tasks, such as image segmentation and registration. Conventional filtering approaches are commonly used to remove US speckles, while their main drawback is long run-time in a 3D scenario.
arxiv  

High-resolution speckle imaging through strong atmospheric turbulence.

Optics Express, 2016
We demonstrate that high-resolution imaging through strong atmospheric turbulence can be achieved by acquiring data with a system that captures short exposure ("speckle") images using a range of aperture sizes and then using a bootstrap multi-frame blind
D. Hope, S. Jefferies, M. Hart, J. Nagy
semanticscholar   +1 more source

Exploring surface‐guided systems for intelligent breathing‐adapted four‐dimensional computed tomography: A comparison to infrared‐based reflective marker systems

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose This study evaluates the technical feasibility of adapting a surface monitoring system, designed for conventional four‐dimensional computed tomography (4DCT), to an intelligent, breathing‐adapted 4DCT and examines its potential to expand the currently limited range of supported surrogate systems.
Niklas Lackner, Andre Karius, Rainer Fietkau, Christoph Bert, Juliane Szkitsak   +4 more
wiley   +1 more source

Convolutional neural network-based single-shot speckle tracking for x-ray phase-contrast imaging [PDF]

arXiv, 2023
X-ray phase-contrast imaging offers enhanced sensitivity for weakly-attenuating materials, such as breast and brain tissue, but has yet to be widely implemented clinically due to high coherence requirements and expensive x-ray optics. Speckle-based phase contrast imaging has been proposed as an affordable and simple alternative; however, obtaining high-
arxiv  

Mitochondrial DNA disorders in neuromuscular diseases in diverse populations

Annals of Clinical and Translational Neurology, EarlyView.
Abstract Neuromuscular features are common in mitochondrial DNA (mtDNA) disorders. The genetic architecture of mtDNA disorders in diverse populations is poorly understood. We analysed mtDNA variants from whole‐exome sequencing data in neuromuscular patients from South Africa, Brazil, India, Turkey and Zambia. In 998 individuals, there were two definite
Fei Gao, Katherine R Schon, Jana Vandrovcova, Özlem Yayıcı Köken, Sharika Raga, Kireshnee Naidu, Maryke Schoonen, Nimita Rani, Pedro Tomaselli, Dipti Baskar, Musambo Kapapa, Ipek Polat, Lindsay A Wilson, Kumarasamy Thangaraj, Uluç Yiş, Bevinahalli N Nandeesh, David Bearden, Michelle Kvalsund, Franclo Henning, Seena Vengalil, Atchayaram Nalini, Claudia F. R. Sobreira, Wilson Marques, Haluk Topoloğlu, Michael G Hanna, Sireesha Yareeda, Venugopalan Y Vishnu, Francois H van der Westhuizen, Izelle Smuts, Surita Meldau, Jo Wilmshurst, Büşranur Çavdarlı, Jeannine Heckmann, Patrick F Chinnery, Rita Horvath   +34 more
wiley   +1 more source

Imaging blood cells through scattering biological tissue using speckle scanning microscopy [PDF]

, 2013
Using optical speckle scanning microscopy [1], we demonstrate that clear images of multiple cells can be obtained through biological scattering tissue, with subcellular resolution and good image quality, as long as the size of the imaging target is smaller than the scanning range of the illuminating speckle pattern.
arxiv   +1 more source

Clinical applications of laser speckle contrast imaging: a review

Journal of Biomedical Optics, 2019
. When a biological tissue is illuminated with coherent light, an interference pattern will be formed at the detector, the so-called speckle pattern. Laser speckle contrast imaging (LSCI) is a technique based on the dynamic change in this backscattered ...
Wido Heeman, W. Steenbergen, G. M. Dam, E. C. Boerma, Christiaan E. Boerma   +4 more
semanticscholar   +1 more source

Dislocation Distribution, Crystallographic Texture Evolution, and Plastic Inhomogeneity of Inconel 718 Fabricated by Laser Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Spatial distribution of microstructure in Inconel 718 3D‐printed with bidirectional strategy with no rotation and chessboard strategy is studied. The former results in a highly ordered arrangement of coarse grains separated by line clusters of dislocation‐dense fine grains. This arrangement is disrupted by the chessboard strategy.
Jalal Al‐Lami, Thibaut Dessolier, Samuel R. Rogers, Talha Pirzada, Minh‐Son Pham   +4 more
wiley   +1 more source

Intermetallic Compound Layer Morphology and Distribution in Friction‐Welded Steel–Aluminum Components

Advanced Engineering Materials, EarlyView.
In this study, how friction‐welding parameters (rotational speed, etc.) affect the morphology, distribution, and local thickness of the intermetallic compound layer (IMC‐layer) in friction‐welded steel‐aluminum hybrid components is investigated. In the results, it is shown that lower speeds (700 rpm) lead to a more uniform, thinner IMC‐layer (<0.5 μm),
Christoph Kahra, Armin Piwek, Julius Peddinghaus, Kai Brunotte, Hans Jürgen Maier, Florian Nürnberger, Sebastian Herbst   +6 more
wiley   +1 more source

Current Trends and Future Perspective for Cold Spray Metal‐Ceramic Composites

Advanced Engineering Materials, EarlyView.
The use of cold spray (CS) technology for creating cermet deposits, combining ceramic and metallic components, is advancing rapidly. Cermets offer excellent temperature handling and erosion resistance for diverse applications. This review outlines the current state of the art, focusing on the deposition dynamics and strategies to optimize the ...
Romario A. Wicaksono, Amir Ardeshiri Lordejani, Sara Bagherifard   +2 more
wiley   +1 more source