Results 121 to 130 of about 22,111 (245)

Three-Dimensional Shape Measurement Using Speckle-Assisted Phase-Order Lines Without Phase Unwrapping

Sensors
Achieving high-accuracy and high-speed 3D shape measurement remains a significant challenge. This paper presents a novel technique using phase-order lines (POLs), which eliminates the need for phase unwrapping in a binocular system.
Ziyou Zhang, Weipeng Yang
doaj   +1 more source

Reducing Variability in Deep Gray Matter QSM Using Differential ROI Referencing: A Phantom and In Vivo Evaluation

NMR in Biomedicine, Volume 39, Issue 6, June 2026.
Differential ROI referencing in QSM reduces subject‐specific offsets and improves group‐discrimination sensitivity, enabling detection of PD‐related susceptibility differences (SN–PU). ABSTRACT Quantitative susceptibility mapping (QSM) measures the intrinsic magnetic susceptibility of tissues.
Tae Hyun Hwang, Gawon Lee, Myung Kyun Woo, Se‐Hong Oh   +3 more
wiley   +1 more source

PIPNet: A Deep Convolutional Neural Network for Multibaseline InSAR Phase Unwrapping Based on Pure Integer Programming

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Multibaseline (MB) phase unwrapping (PU), as the core step in MB InSAR, breaks the limitation of phase continuity assumption. However, it still suffers from insufficient noise robustness and low unwrapping efficiency.
Hui Liu, Ke Zheng, Changwei Miao, Xuemei Liu, Xianlin Liu, Lin Li, Yongguang Zhang, Longhai Xiong   +7 more
doaj   +1 more source

Mine Personnel Positioning System Based on Dual-Wavelength Phase Unwrapping. [PDF]

Comput Intell Neurosci, 2022
Zhang H, Zhang L, Zhao Z.
europepmc   +1 more source

Robust phase unwrapping by spinning iteration

Optics Express, 2007
This work describes a rapid-phase unwrapping algorithm that combines the rapidity and simplicity of a path-dependent algorithm and the robustness of a path-independent algorithm by rotating the phase map or the unwrapping direction 90 degrees after a scan in one direction. It offers a solution for noise-contaminated phase data, which includes artifacts,
openaire   +2 more sources

Reducing Noise Induced by Cardiac Pulsatility in Brain Maps of R2* and Magnetic Susceptibility Using Tailored k‐space Sampling

NMR in Biomedicine, Volume 39, Issue 6, June 2026.
With linear k‐space sampling trajectories, cardiac pulsation leads to MRI signal instabilities that increase the variability (standard deviation, SD) of R2* and QSM maps across repetitions. Here, we propose alternative trajectories that aim to mitigate the impact of cardiac‐induced noise in brain maps of R2* and QSM.
Quentin Raynaud, Thomas Dardano, Rita Oliveira, Giulia Di Domenicantonio, Tobias Kober, Christopher W. Roy, Ruud B. van Heeswijk, Antoine Lutti   +7 more
wiley   +1 more source

Automated phase unwrapping in digital holography with deep learning. [PDF]

Biomed Opt Express, 2021
Park S, Kim Y, Moon I.
europepmc   +1 more source

Pulsatility Assessment of Cerebral Perforating Arteries Using Submillimeter‐Resolution Dual‐VENC Phase‐Contrast MRI at 3T

Journal of Magnetic Resonance Imaging, Volume 63, Issue 5, Page 1246-1256, May 2026.
ABSTRACT Background Dysfunction of cerebral perforating arteries is a major contributor to cerebral small vessel disease. Developing a reliable MRI technique for assessing cerebral perforating arteries on widely accessible 3T systems would be advantageous.
Jianing Tang, Sang Hun Chung, Maria Gamez, Tianrui Zhao, Michael S. Wolf, Dilip K. Pandey, Philip B. Gorelick, Lirong Yan   +7 more
wiley   +1 more source

New 3D phase-unwrapping method based on voxel clustering and local polynomial modeling: application to quantitative susceptibility mapping. [PDF]

Quant Imaging Med Surg, 2023
Cheng J, Zheng Q, Xu M, Xu Z, Zhu L, Liu L, Han S, Chen W, Feng Y, Cheng J.   +9 more
europepmc   +1 more source

Longitudinal 4D Flow MRI‐Derived Wall Shear Stress in Patients With an Abdominal Aortic Aneurysm

Journal of Magnetic Resonance Imaging, Volume 63, Issue 5, Page 1380-1391, May 2026.
ABSTRACT Background 4D flow MRI‐derived parameters such as wall shear stress (WSS) may improve abdominal aortic aneurysm (AAA) progression prediction. Validation of this biomarker is needed, but longitudinal data are lacking. Purpose Investigate longitudinal WSS changes and associations with AAA morphology. Study Type Prospective.
E. Aalbregt, W. Stehling, E. M. Schrauben, J. van Schuppen, L. J. Meijboom, R. A. P. Takx, A. J. Nederveen, P. van Ooij, V. Jongkind, K. K. Yeung   +9 more
wiley   +1 more source