Results 231 to 240 of about 73,555 (300)

A computational model for retinal haemodynamics under gravitational and postural variations

The Journal of Physiology, EarlyView.
Abstract figure legend The haemodynamic impact of gravitational and postural changes on the retina, and its relevance to spaceflight associated neuro‐ocular syndrome (SANS), remains incompletely characterized. This study assesses retinal haemodynamics from upright to head‐down tilt using a lumped‐parameter model that dynamically couples intraocular ...
Michele Nigro, Andrea Montanino, Eduardo Soudah   +2 more
wiley   +1 more source

Profound neuronal differences during exercise‐induced hypoalgesia between athletes and non‐athletes revealed by functional near‐infrared spectroscopy

The Journal of Physiology, EarlyView.
Abstract figure legend After high‐intensity interval training (HIIT), endurance athletes demonstrated a reduction in pain perception, alongside decreased oxyhaemoglobin concentrations in the prefrontal, sensorimotor and posterior parietal cortices.
Maria Geisler, Marco Herbsleb, Feliberto de la Cruz, Sabrina von Au, Andy Schumann, Ilona Croy, Karl‐Jürgen Bär   +6 more
wiley   +1 more source

Jointly Learned 3D Non‐Cartesian Sampling With Wave Encoding and Reconstruction for Neurovascular Phase Contrast MRI

Magnetic Resonance in Medicine, Volume 95, Issue 5, Page 2554-2567, May 2026.
ABSTRACT Purpose To develop accelerated 3D phase contrast (PC) MRI using jointly learned wave encoding and reconstruction. Methods Pseudo‐fully sampled neurovascular 4D flow data (N = 40) and a simulation framework were used to learn phase encoding locations, wave readout parameters, and model‐based reconstruction network (MoDL) for a rapid 3D PC scan (
Chenwei Tang, Brock W. Jolicoeur, James Rice, Caroline A. Doctor, Zaynab S. Yardim, Leonardo A. Rivera‐Rivera, Laura B. Eisenmenger, Kevin M. Johnson   +7 more
wiley   +1 more source

Velocity Spectrum Imaging Using Velocity Encoding Preparation Pulses

Magnetic Resonance in Medicine, Volume 95, Issue 5, Page 2568-2579, May 2026.
ABSTRACT Purpose The goal of this article is to introduce a technique to measure the velocity distribution of water inside each voxel of an MR image. The method is based on the use of motion sensitizing gradients with changing first moment to encode velocity. As such, it is completely non‐invasive and requires no contrast injections.
Luis Hernandez‐Garcia, Alberto L. Vazquez, Douglas C. Noll   +2 more
wiley   +1 more source

Functional Segregation of Pancreatic Microcirculation Reveals Sex‐Dependent Microhemodynamic Signatures

Comprehensive Physiology, Volume 16, Issue 2, April 2026.
Pancreatic exocrine microcirculation exhibits sexual dimorphism arising from steroid–genetic interactions. Laser Doppler flowmetry combined with wavelet analysis identifies a male passive coupling phenotype aligned with systemic pressure and a female active vasomotion phenotype driven by ERβ‐mediated, NO‐dependent oscillations.
Yuan Li, Yingyu Wang, Bing Wang, Qin Ouyang, Weiqi Liu, Xiang Xu, Xu Zhang, Mingming Liu, Ruijuan Xiu   +8 more
wiley   +1 more source

Secondary Aortoduodenal Fistula Diagnosed after Repeated Gastrointestinal Bleeding Episodes in a Patient With Prior Aortic Graft Surgery

DEN Open, Volume 6, Issue 1, April 2026.
Abstract Secondary aortoduodenal fistula (sADF) is a rare but life‐threatening complication after aortic graft surgery. Diagnosis is often challenging, particularly when contrast‐enhanced computed tomography (CT) and endoscopy results are inconclusive. We report a case in which diagnosis was challenging due to contrast media allergy and non‐diagnostic ...
Jun Kubota, Chikamasa Ichita, Soichiro Nakaya, Takashi Nishino, Chihiro Sumida, Akiko Sasaki, Daisuke Hama   +6 more
wiley   +1 more source

Motion Mitigation Techniques for Abdominal and Cardiac MR Imaging

Journal of Magnetic Resonance Imaging, Volume 63, Issue 4, Page 917-937, April 2026.
ABSTRACT MRI of the heart and abdominal organs provides unparalleled soft tissue contrast and quantitative biomarkers, yet remains highly susceptible to physiological motion. Contractions of the myocardium, respiratory excursions, peristalsis, vascular pulsatility, and unpredictable bulk patient movement generate artifacts that impair image quality ...
Eric M. Schrauben, Gastao Lima da Cruz, Christopher W. Roy, Thomas Küstner   +3 more
wiley   +1 more source

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On Pulsatile Blood Flow

Transactions of the Society of Rheology, 1973
In this paper pulsatile blood flow through rigid circular tubes due to a sinusoidally varying pressure gradient is analyzed using a microcontinuum model of blood. A new boundary condition, which is in accord with experimental observations on blood flow in small rigid tubes, has been proposed to describe red blood cell rotations at a solid boundary ...
Turk, Martin A., Sylvester, Nicholas D., Ariman, Teoman   +2 more
openaire   +2 more sources

Pulsatile Flow in Hemodialyzers

Journal of Dialysis, 1978
The present work is concerned with the calculation of NaCl transfer in flowing solutions and its dependence upon flow characteristics at hemodialyzers. A theoretical analysis of the solute transfer in a hemodialyzer is presented. Experiments were carried out with a continuous flow flat-plate dialyzer.
A R, Ozdural, E, Piskin
openaire   +2 more sources