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Overcoming the thermal limits of photon counting CT resolution using focal spot multiplexing: A feasibility study.
Med Phys
January 2025
Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA.
Background: The spatial resolution of new, photon counting detector (PCD) CT scanners is limited by the size of the focal spot. Smaller, brighter focal spots would melt the tungsten focal track of a conventional X-ray source.
Purpose: To propose focal spot multiplexing (FSM), an architecture to improve the power of small focal spots and thereby enable higher resolution clinical PCD CT.
Sensitive dependence of pairing symmetry on Ni-e crystal field splitting in the nickelate superconductor LaNiO.
Nat Commun
January 2025
NYU-ECNU Institute of Physics, NYU Shanghai, Shanghai, China.
The discovery of high-temperature superconductivity in LaNiO under pressure has drawn great attention. However, consensus has not been reached on its pairing symmetry in theory. By combining density-functional-theory (DFT), maximally-localized-Wannier-function, and linearized gap equation with random-phase-approximation, we find that the pairing symmetry of LaNiO is d, if its DFT band structure is accurately reproduced by a downfolded bilayer two-orbital model.
View Article and Find Full Text PDFHigh Middle Cerebral Artery Wall Shear Stress in Branch Atheromatous Disease: A Computational Fluid Dynamics Analysis.
J Atheroscler Thromb
January 2025
Department of Neurology, National Cerebral and Cardiovascular Center.
Aim: Branch atheromatous disease (BAD), characterized by the occlusion of perforating branches near the orifice of a parent artery, often develops early neurological deterioration because the mechanisms underlying BAD remain unclear. Abnormal wall shear stress (WSS) is strongly associated with endothelial dysfunction and plaque growth or rupture. Therefore, we hypothesized that computational fluid dynamics (CFD) modeling could detect differences in WSS between BAD and small-vessel occlusion (SVO), both of which result from perforating artery occlusion/stenosis.
View Article and Find Full Text PDFDose-response Relationship Between Dietary Nitrate Intake and Nitric Oxide Congeners in Various Blood Compartments and Skeletal Muscle: Differential Effects on Skeletal Muscle Torque and Velocity.
Free Radic Biol Med
January 2025
University of Exeter, Medical School, Faculty of Health and Life Sciences, St Luke's Campus, Exeter, EX1 2LU, UK. Electronic address:
Plasma nitrate (NO) and nitrite (NO) increase in a dose-dependent manner following NO ingestion. To explore if the same dose-response relationship applies to other nitric oxide (NO) congeners in different blood compartments and skeletal muscle, as well as the subsequent physiological responses, we provided 11 healthy participants with NO depleted beetroot juice (placebo), and beetroot juice (BR) containing 6.4, 12.
View Article and Find Full Text PDFAdditive-free 3D-printed nanostructured carboxymethyl cellulose aerogels.
Int J Biol Macromol
January 2025
Mines Paris, PSL University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, Rue Claude Daunesse, 06904 Sophia Antipolis, France. Electronic address:
3D printing of polysaccharide solutions is widely recognized as a highly promising method in the biomedical field for achieving complex customized shapes. One of the main challenges is in selecting conditions, in particular, the rheological properties of the system, to retain the printed shape. For the first time, the direct ink writing (DIW) is successfully applied to neat carboxymethyl cellulose (CMC) solutions without any additives or crosslinking, only by adjusting solutions' rheological properties.
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