Results 1 to 10 of about 222 (129)

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

NMR Biomed
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.
Hwang TH, Lee G, Woo MK, Oh SH.
europepmc   +2 more sources

Advancing Quantitative Susceptibility Mapping With 2.5D Diffusion Models for Rapid Intracranial Hemorrhage Quantification. [PDF]

Magn Reson Med
ABSTRACT Purpose To develop a generative diffusion model‐based approach for robust and efficient quantitative susceptibility mapping (QSM) reconstruction in intracranial hemorrhage (ICH), applicable to both standard gradient echo (GRE) and rapid echo planar imaging (EPI) acquisitions.
Xiong Z, Gao Y, Liu F, Emery D, Butcher K, Wilman AH, Sun H.   +6 more
europepmc   +2 more sources

An Integrated QSM-Radiomics Nomogram With Clinical and Imaging Markers for Stratifying Cognitive Impairment in Hypertension. [PDF]

CNS Neurosci Ther
This study developed an integrated nomogram combining QSM‐based radiomics, brain iron deposition, white matter hyperintensity, and clinical markers. This model demonstrated superior performance in stratifying hypertensive cognitive impairment compared to traditional single‐parameter models.
Su Y, Liu T, Dong C, Ge L, Li T, Zhang Z, Zhang Y, Li C, Zhao J, Zheng C, Haacke EM, Wu W, Wang L.   +12 more
europepmc   +2 more sources

Extended Phase Unwrapping Max-Flow/Min-Cut Algorithm for Multibaseline SAR Interferograms Using a Two-Stage Programming Approach [PDF]

Sensors, 2020
Multi-baseline (MB) phase unwrapping (PU) is a key step of MB synthetic aperture radar (SAR) interferometry (InSAR). Compared with the traditional single-baseline (SB) PU, MB PU is applicable to the area where topography varies violently without obeying ...
Lifan Zhou, Yang Lan, Yu Xia, Shengrong Gong   +3 more
doaj   +2 more sources

An ALoGI PU Algorithm for Simulating Kelvin Wake on Sea Surface Based on Airborne Ku SAR [PDF]

Sensors
The airborne Synthetic Aperture Radar (SAR) has the advantages of high-precision real-time observation of wave height variations and portability in the high frequency band, such as the Ku band. In view of the Four Fast Fourier Transform (4-FFT) algorithm,
Limin Zhai, Yifan Gong, Xiangkun Zhang
doaj   +2 more sources

Quantitative Assessment of Deep Gray Matter Susceptibility and Correlation With Cognition in Patients With Liver Cirrhosis. [PDF]

Brain Behav
The impact of brain metal deposition on cognitive decline in patients with liver cirrhosis remains unclear. Quantitative susceptibility mapping (QSM) was employed to assess deep gray matter, and its association with cognition was examined. Our findings demonstrate a significant correlation between the susceptibility of the red nucleus, substantia nigra,
Wu W, Su Y, Qin Z, Kang J, Xiang D, Liu D, Zheng C, Haacke EM, Wang L.   +8 more
europepmc   +2 more sources

Brain iron load and neuroaxonal vulnerability in adult attention-deficit hyperactivity disorder. [PDF]

Psychiatry Clin Neurosci
Aim Adult attention deficit hyperactivity disorder (ADHD) may be associated with an increased risk of dementia in old age. Here, we investigated the liability for neurodegenerative brain disease in adult ADHD, possibly reflected by increased brain iron content and associated neuroaxonal vulnerability. Methods Thirty‐two adults with ADHD (35 ± 10 years)
Berberat J, Kagerer SM, Späni C, Hua J, Bavato F, Gruber P, van Zijl PC, Perroud N, Li X, Stämpfli P, Seifritz E, Lövblad KO, Quednow BB, Unschuld PG.   +13 more
europepmc   +2 more sources

MAPUNet: Multi-scale attention for InSAR phase unwrapping in mining areas. [PDF]

PLoS ONE
Due to the large deformation gradient caused by large-scale and high-intensity mining in the mining area, severe incoherence is prone to occur during the radar interferometry processing.
Baojing Zhang, Wenfu Yang, Xiaowei Zhang, Li Wang, Yan Cui, Xiaoyu Wang, Yufei Zhang   +6 more
doaj   +2 more sources

SPAN-PU: Spatially Adaptive $\ell _{p}$-Norm Phase Unwrapping via Bilevel Learning

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Phase unwrapping (PU) is a critical step in interferometric synthetic aperture radar (InSAR) processing, directly affecting the accuracy of digital elevation models and deformation measurements.
Xin Ye, Hanwen Yu, Taoli Yang, Yan Yan, Lifan Zhou   +4 more
doaj   +2 more sources

Adaptive Unscented Kalman Filter Phase Unwrapping Method and Its Application on Gaofen-3 Interferometric SAR Data [PDF]

Sensors, 2018
Phase unwrapping (PU) is a key step in the reconstruction of digital elevation models (DEMs) and the monitoring of surface deformation from interferometric synthetic aperture radar (SAR, InSAR) data.
Yandong Gao, Shubi Zhang, Tao Li, Qianfu Chen, Shijin Li, Pengfei Meng   +5 more
doaj   +2 more sources