Results 51 to 60 of about 52,331 (304)

High-Resolution Scanning Coded-Mask-Based X-ray Multi-Contrast Imaging and Tomography

Journal of Imaging, 2021
Near-field X-ray speckle tracking has been used in phase-contrast imaging and tomography as an emerging technique, providing higher contrast images than traditional absorption radiography.
Zhi Qiao, Xianbo Shi, Michael Wojcik, Lahsen Assoufid   +3 more
doaj   +1 more source

Estimating the phase in ground-based interferometry: performance comparison between single-mode and multimode schemes [PDF]

, 2010
In this paper we compare the performance of multi and single-mode interferometry for the estimation of the phase of the complex visibility. We provide a theoretical description of the interferometric signal which enables to derive the phase error in ...
A. Chelli, Benisty, Buscher, Canales, Chelli, Chelli, Colavita, Coudé du Foresto, Coudé du Foresto, Dyck, E. Tatulli, F. Malbet, Fried, Fusco, J. P. Berger, Martin, Masciadri, Mourard, N. Blind, Noll, Roddier, Roddier, Shaklan, Shao, Tatulli, Tatulli, Tatulli, Tatulli, Tubbs, Vannier   +29 more
core   +4 more sources

Dynamic X-ray speckle-tracking imaging with high-accuracy phase retrieval based on deep learning

IUCrJ
Speckle-tracking X-ray imaging is an attractive candidate for dynamic X-ray imaging owing to its flexible setup and simultaneous yields of phase, transmission and scattering images.
Fucheng Yu, Kang Du, Xiaolu Ju, Feixiang Wang, Ke Li, Can Chen, Guohao Du, Biao Deng, Honglan Xie, Tiqiao Xiao   +9 more
doaj   +1 more source

Strain dyssynchrony index determined by three-dimensional speckle area tracking can predict response to cardiac resynchronization therapy

Cardiovascular Ultrasound, 2011
Background We have previously reported strain dyssynchrony index assessed by two-dimensional speckle tracking strain, and a marker of both dyssynchrony and residual myocardial contractility, can predict response to cardiac resynchronization therapy (CRT).
Onishi Tetsuari, Matsumoto Kensuke, Norisada Kazuko, Fukuda Yuko, Omar Alaa MS, Yamawaki Kohei, Ryo Keiko, Kaneko Akihiro, Tsuji Takayuki, Tanaka Hidekazu, Tatsumi Kazuhiro, Yoshida Akihiro, Kawai Hiroya, Hirata Ken-ichi   +13 more
doaj   +1 more source

Role of Dobutamine Stress Test and Speckle Tracking in Ischemic Heart Disease, Comparative Study

Medical Journal of Babylon
Background:Coronary artery disease (CAD) is a major cause of cardiovascular mortality. Echocardiography plays a vital role in early detection and treatment. Objectives:We investigated the use of speckle tracking during dobutamine stress echocardiography (
Marwa Majeed Kadhim, Shokry F. AL-Saad, Hassan Salim Al-Jumaily, Zainab Falah Hassan   +3 more
doaj   +1 more source

3D-speckle-tracking echocardiography correlates with cardiovascular magnetic resonance imaging diagnosis of acute myocarditis – An observational study

International Journal of Cardiology: Heart & Vasculature, 2022
Background: The diagnostic importance of three-dimensional (3D) speckle-tracking strain-imaging echocardiography in patients with acute myocarditis remains unclear.
Philip Roger Goody, Sebastian Zimmer, Can Öztürk, Angela Zimmer, Jens Kreuz, Marc Ulrich Becher, Alexander Isaak, Julian Luetkens, Atsushi Sugiura, Felix Jansen, Georg Nickenig, Christoph Hammerstingl, Vedat Tiyerili   +12 more
doaj   +1 more source

Accuracy assessment of Tri-plane B-mode ultrasound for non-invasive 3D kinematic analysis of knee joints [PDF]

, 2016
BACKGROUND Currently the clinical standard for measuring the motion of the bones in knee joints with sufficient precision involves implanting tantalum beads into the bones.
Lambert, Andrew, Masum, Md, Pickering, Mark, Scarvell, Jennie, Smith, Paul   +4 more
core   +1 more source

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

Molecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung, David Bickel, Lena C. M. Krause, Daria Ezeriņa, Christian Ickes, Julian Wojtachnia, Christine S. Gibhardt, Magdalena Shumanska, Khadija Wahni, Andrea Paluschkiwitz, Julia Malo Pueyo, Ekaterina Baranova, Wim Vranken, Hedwig Stanisz, Ioana Stejerean‐Todoran, Michael P. Schön, Joris Messens, Ivan Bogeski   +17 more
wiley   +1 more source

EDNRB‐dependent endothelin signaling reduces proliferation and promotes proneural‐to‐mesenchymal transition in gliomas

Molecular Oncology, EarlyView.
Glioma cells mainly express the endothelin receptor EDNRB, while EDNRA is restricted to a perivascular tumor subpopulation. Endothelin signaling reduces glioma cell proliferation while promoting migration and a proneural‐to‐mesenchymal transition associated with poor prognosis. This pathway activates Ca2+, K+, ERK, and STAT3 signalings and is regulated
Donovan Pineau, Leonor Garcia, Hugo Arnold, Antonija Hanžek, Maialen Arrieta, Laurent R Gauthier, Christine Granotier‐Beckers, François D Boussin, Amaury Herbet, Marie Hautière, Valentin Asei‐Ceschino, Clémentin Jacques, Laura Brard, Thomas Harnois, Valérie Coronas, Bruno Constantin, Aurélien Chatelier, Jean Chemin, Serge Urbach, Martial Seveno, Szimonetta Hideg, Chantal Ripoll, Kasandra Aguilar‐Cázarez, Min Zheng, Guo‐Hao Huang, Sheng‐Qing Lv, Lei Zhang, Philippe Rondard, Laurent Prezeau, Jean‐Philippe Pin, Hugues Duffau, Luc Bauchet, Valérie Rigau, Franck Denat, Charles Truillet, Didier Boquet, Jean‐Philippe Hugnot   +36 more
wiley   +1 more source

The role of Speckle Tracking Echocardiography and Threedimensional Echocardiography in the Assessment of Left Ventricular Systolic Function in Type II Patients with diabetes with Negative Myocardial Perfusion Imaging in Correlation to Multi-gated Acquisition Scan

International Journal of the Cardiovascular Academy, 2023
Background and Aim:Two-dimensional (2D) speckle tracking echocardiography (STE) has shown promising results being a recent technology to assess “myocardial performance” in cardiac patients.
Taghreed Ahmed, Mona Naiem, Taher Said, Mohamed Zahran   +3 more
doaj   +1 more source