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Positive susceptibility-based contrast imaging with dephased balanced steady-state free precession.
Magn Reson Med
March 2025
New Markets, Magnetic Resonance, Siemens Healthineers AG, Erlangen, Germany.
Purpose: Dephasing gradients can be introduced within a variety of gradient-echo pulse sequences to delineate local susceptibility changes ("White-Marker" phenomenon), e.g., for the visualization of metallic interventional devices which are otherwise difficult to display.
View Article and Find Full Text PDFDenoising complex-valued diffusion MR images using a two-step, nonlocal principal component analysis approach.
Magn Reson Med
March 2025
Center for Magnetic Resonance Research, Radiology, Medical School, University of Minnesota, Minneapolis, Minnesota, USA.
Purpose: To propose a two-step, nonlocal principal component analysis (PCA) method and demonstrate its utility for denoising complex diffusion MR images with a few diffusion directions.
Methods: A two-step denoising pipeline was implemented to ensure accurate patch selection even with high noise levels and was coupled with data preprocessing for g-factor normalization and phase stabilization before data denoising with a nonlocal PCA algorithm. At the heart of our proposed pipeline was the use of a data-driven optimal shrinkage algorithm to manipulate the singular values in a way that would optimally estimate the noise-free signal.
Effect of intermittent hemodialysis filtration mode on intradialytic hypotension and nutritional status in patients with end-stage renal disease.
Ther Apher Dial
March 2025
Nephrology Blood Purification Center, The First Medical Center, Chinese People's Liberation Army General Hospital, Beijing, China.
Introduction: This study aimed to investigate the effect of intermittent hemodialysis filtration mode (IHDF) on intradialytic hypotension and nutritional status in patients with end-stage renal disease (ESRD).
Methods: Patients with ESRD who underwent hemodialysis and were treated at our hospital from December 2021 to December 2023 according to the inclusion and exclusion criteria were selected and randomly assigned into two groups: the experimental group (patients received intermittent hemodialysis filtration mode treatment, n = 50) and the control group (patients received conventional maintenance hemodialysis treatment, n = 49). Subsequently, the participant characteristics, the treatment effect, the occurrence of intradialytic hypotension, the safety assessment, blood pressure indicators, and the nutritional status were compared between the two groups.
Dual Functional Electroconductive Biofortified Electrospun Scaffold Functionalized With MWCNTs and Bacopa Monnieri for Accelerated Peripheral Nerve Regeneration.
Small
March 2025
Centre for Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India.
Peripheral nerve injuries (PNIs) often lead to semi or complete loss of motor, sensory and autonomic functions. Although autografts are still the best option for PNI repair, their use is restricted due to the morbidity and availability of donor nerves. Because electrospun scaffolds may replicate the structure of native extracellular matrix (ECM), they provide a viable alternative.
View Article and Find Full Text PDFTreat-And-Extend Versus Pro Re Nata Regimen of Intravitreal Conbercept Injection for Neovascular Age-Related Macular Degeneration: Results from COCOA, a Prospective, Open-Label, Multicenter, Randomized Phase IV Clinical Trial.
Semin Ophthalmol
March 2025
Department of Ophthalmology, Peking University People's Hospital, Beijing, China.
Purpose: To evaluate and contrast the effectiveness and safety of two conbercept treatment protocols-a three-dose treat-and-extend (3+T&E) regimen and a three-dose pro re nata (3+PRN) regimen-in Chinese patients diagnosed with neovascular age-related macular degeneration (nAMD).
Methods: Eligible patients, who had not undergone anti-VEGF intraocular injections within 3 months prior to enrollment, were randomly assigned to either the 3+T&E or 3+PRN regimen. The 3+T&E group received at least three monthly injections, with subsequent visit intervals extended based on disease activity assessment.
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