Results 71 to 80 of about 4,611 (209)

Drought‐Induced Abscisic Acid Accumulation in Soybean Roots Depends on NCED Gene Expression More Than Shoot‐to‐Root ABA Transport

Plant, Cell &Environment, EarlyView.
Abstract Abscisic acid (ABA) is a key phytohormone in plant responses to water deficit. Although there is extensive evidence that roots can synthesise ABA, recent findings suggest that local synthesis in response to dehydration contributes little to the root ABA pool compared to shoot‐sourced ABA.
Jaime Puértolas, Pedro Castro‐Valdecantos, Moxian Chen, Jianhua Zhang, Ian C. Dodd   +4 more
wiley   +1 more source

Feasibility of ALOS2 PALSAR2 Offset-Based Phase Unwrapping of SAR Interferogram in Large and Complex Surface Deformations

IEEE Access, 2018
The interferometric synthetic aperture radar (InSAR) is a well-known tool for mapping ground surface deformations with centimeter precision, and is much better than that used in the offset tracking method.
Won-Kyung Baek, Hyung-Sup Jung, Sung-Ho Chae   +2 more
doaj   +1 more source

4D ultrasound reveals regional left atrial strain remodelling in a murine model of reversible pressure overload

The Journal of Physiology, EarlyView.
Abstract figure legend Traditional planar imaging approaches of the left atrium do not capture complex geometry. Four‐dimensional imaging allows the acquisition of 3D data + time to visualize left atrial geometry and kinematics. We designed an advanced analysis technique to investigate left atrial biomechanics in a model of pressure overload and ...
John P. Salvas, Thomas Moore‐Morris, Craig J. Goergen, Pierre Sicard   +3 more
wiley   +1 more source

A Novel 9‐Channel 1H, 3‐Channel 31P Radiofrequency Coil for Interleaved Multinuclear Studies of Human Calf Muscle at 7 T

Magnetic Resonance in Medicine, Volume 95, Issue 5, Page 3008-3020, May 2026.
ABSTRACT Purpose To develop a double‐tuned calf coil with excellent 1H and 31P performance to study muscle physiology by interleaved 1H/31P MRS and parallel imaging at 7 T. Methods The coil combines three 1H transceive dipoles, six 1H receive‐only loops and three 31P transceive loops, arranged in a nested, half‐cylindrical layout.
Veronika Cap, Vasco Rafael Rocha dos Santos, Kostiantyn Repnin, Onisim Soanca, Elmar Laistler, Peter Wolf, Graham J. Kemp, Roberta Frass‐Kriegl, Martin Meyerspeer   +8 more
wiley   +1 more source

AI-Based 2D Phase Unwrapping Under Rayleigh-Distributed Speckle Noise and Phase Decorrelation

Photonics
Phase unwrapping is a critical step in interferometric imaging modalities such as holography and synthetic aperture radar, yet conventional analytical algorithms struggle in low signal-to-noise and high-speckle environments.
Aidan Soal, Juergen Meyer, Bryn Currie, Steven Marsh   +3 more
doaj   +1 more source

Polynomial phase estimation by phase unwrapping

, 2012
Estimating the coefficients of a noisy polynomial phase signal is important in fields including radar, biology and radio communications. One approach attempts to perform polynomial regression on the phase of the signal. This is complicated by the fact that the phase is wrapped modulo 2 and must be unwrapped before regression can be performed.
McKilliam, Robby G., Quinn, Barry G., Clarkson, I. Vaughan L., Moran, Bill, Vellambi, Badri N.   +4 more
openaire   +2 more sources

Evaluation of Brain Microstructural Alterations in Preschool Autism Spectrum Disorder: A Voxel‐Wise Multimodal MRI Study

Journal of Magnetic Resonance Imaging, Volume 63, Issue 4, Page 1053-1066, April 2026.
ABSTRACT Background Autism Spectrum Disorder (ASD) presents with early neurodevelopmental alterations in preschool children, yet comprehensive characterization using multimodal quantitative MRI remains limited in this age group. Purpose To investigate voxel‐wise brain microstructural differences in preschool ASD through integrated analysis of cerebral ...
Changhao Wang, Meiying Cheng, Yu Lu, Jinxia Guo, Xueyan Liu, Zhanqi Feng, Shipeng Liu, Xin Zhao   +7 more
wiley   +1 more source

InSAR phase unwrapping: a polarimetric approach

RADAR 2002, 2003
This paper addresses a polarimetric approach to improve the interferometric phase estimation based on an extension of the ESPRIT algorithm applied to different kinds of scatterers. The basics of SAR interferometry are presented. The article introduces the ESPRIT algorithm using polarimetric data with a description of the scattering model, the ESPRIT ...
Guillaso, Stéphane, Ferro-Famil, Laurent, Reigber, Andreas, Pottier, Eric   +3 more
openaire   +3 more sources

Mapping Intracellular Volume Fraction With Susceptibility Source Decomposition as a Marker for Tissue Cellularity

Journal of Magnetic Resonance Imaging, Volume 63, Issue 4, Page 1092-1105, April 2026.
ABSTRACT Background Pathophysiological changes affect tissue cell composition and density. For example, neurodegenerative disorders and brain tumors are associated with cell loss and abnormal accumulation, respectively. In these scenarios, if monitored and tracked, tissue cellularity might be used to inform clinical diagnosis and management. Purpose To
Giulia Debiasi, Oliver C. Kiersnowski, Giovanni Librizzi, Luca Roccatagliata, Renzo Manara, Mauro Costagli, Alessandra Bertoldo, Chunlei Liu   +7 more
wiley   +1 more source

StaMPS Improvement for Deformation Analysis in Mountainous Regions: Implications for the Damavand Volcano and Mosha Fault in Alborz

Remote Sensing, 2015
Interferometric Synthetic Aperture Radar (InSAR) capability to detect slow deformation over terrain areas is limited by temporal decorrelation, geometric decorrelation and atmospheric artefacts.
Sanaz Vajedian, Mahdi Motagh, Faramarz Nilfouroushan   +2 more
doaj   +1 more source