Results 111 to 120 of about 8,914 (243)
International Journal for Numerical Methods in Fluids, Volume 98, Issue 4, Page 398-432, April 2026.We introduce new efficient and accurate first order finite volume‐type numerical schemes, for the non‐conservative one‐dimensional blood flow equations with transport, taking into account different velocity profiles. The framework is the flux‐vector splitting approach of Toro and Vázquez‐Cendón (2012), that splits the system in two subsystems of PDEs ...
Alessandra Spilimbergo +3 more
wiley +1 more source
International Journal for Numerical Methods in Fluids, Volume 98, Issue 4, Page 448-468, April 2026.The proposed work implements a direct flux reconstruction method for spatial discretization and a stiffness‐resilient exponential time integration method for temporal discretization on the cube‐sphere grid. A space‐time tensor formalism is employed to provide a general representation in any curvilinear coordinate system. This combination enables highly
Stéphane Gaudreault +6 more
wiley +1 more source
Optimizing Detection Schemes for Broadband Pump‐Probe Microscopy
Microscopy Research and Technique, Volume 89, Issue 4, Page 551-556, April 2026.Small spot sizes and broadband spectral coverage create unusual noise challenges for broadband pump‐probe microscopy. Analysis of probe and detector noise characteristics can provide strategies for mitigating these challenges. ABSTRACT Although similar to more commonly implemented single wavelength approaches, broadband pump‐probe or transient ...
Kendall Benton +3 more
wiley +1 more source
31P MRSI Coil Combination Using 23Na Sensitivity Information
Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 1907-1920, April 2026.ABSTRACT Purpose To optimally combine receive channels for 31P MRSI when the SNR is relatively low using sensitivity maps obtained from 23Na signals. Methods This study utilized a dedicated X‐nuclei 15‐channel head coil array capable of imaging both 23Na and 31P.
Jiying Dai +5 more
wiley +1 more source
RF‐Shielding of Laser‐Cut Venous Stents: Calculations, Simulations, and Experiments
Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 2331-2344, April 2026.ABSTRACT Purpose To develop an analytical model of the RF‐shielding of laser‐cut venous stents for different orientations and stent geometries. Methods Laser‐cut venous stents are modeled as a grid composed of circular and rectangular loops. As these loops are orthogonal they shield different components of the transmit RF field.
Lisa Regler +7 more
wiley +1 more source
A Nodal Immersed Finite Element-Finite Difference Method. [PDF]
J Comput Phys, 2023 Wells D +3 more
europepmc +1 more source
A Parallelized 3D Geomechanical Solver for Fluid‐Induced Fault Slip in Poroelastic Media
International Journal for Numerical and Analytical Methods in Geomechanics, Volume 50, Issue 5, Page 2570-2586, 10 April 2026.ABSTRACT We present a fully implicit formulation of coupled fluid flow and geomechanics for fluid injection/withdrawal in fractured reservoirs in the context of CO2$\textrm {CO}_2$ storage. Utilizing a Galerkin finite‐element approach, both flow and poroelasticity equations are discretized on a shared three‐dimensional mesh.
Emil Rinatovich Gallyamov +4 more
wiley +1 more source
31P‐MRS of the Human Heart at 7 T With an Integrated Whole‐Body 31P Radiofrequency Transmit Coil
NMR in Biomedicine, Volume 39, Issue 4, April 2026.We demonstrate the use of an integrated whole‐body phosphorus‐31 (31P) radiofrequency transmit coil for 31P‐MR spectroscopic imaging of the human heart at 7 T. Intersession measurement repeatability of the mid‐septal myocardial phosphocreatine (PCr) over adenosine triphosphate (ATP) concentration ratio in normal volunteers was 17.7%.
Mark W. J. M. Gosselink +5 more
wiley +1 more source
NMR in Biomedicine, Volume 39, Issue 4, April 2026.This first application of longitudinal 3D‐DCE MRI in the RUPP model demonstrated acute perfusion deficits after RUPP that resolved rapidly with advancing gestation, consistent with the adaptive placental responses to reduced uterine blood flow. ABSTRACT Placental insufficiency is a major cause of preeclampsia and fetal growth restriction.
Fatimah M. Al Darwish +7 more
wiley +1 more source
NMR in Biomedicine, Volume 39, Issue 4, April 2026.This study investigates the effect of cerebral and vascular (beta‐amyloid) Aβ on regional myeloarchitecture and lipid composition in a murine model of Alzheimer's disease (AD). The study highlights the feasibility of quantitative MRI and chemical exchange saturation transfer (CEST) imaging to identify multiple biophysical mechanisms involved in ...
Syed Salman Shahid +7 more
wiley +1 more source