Results 11 to 20 of about 1,347,814 (421)

Quantification of blood flow in internal cerebral artery by optical flow method on digital subtraction angiography in comparison with time-of-flight magnetic resonance angiography. [PDF]

PLoS ONE, 2013
OBJECTIVE: This study compared data on the blood flow velocity in the internal carotid artery, which was obtained using the optical flow method (OFM) with digital subtraction angiography (DSA) and the time-of-flight (TOF) technique using magnetic ...
Tzung-Chi Huang, Chih-Kai Chang, Chun-Han Liao, Yung-Jen Ho   +3 more
doaj   +1 more source

Measurements of Blood Flow Velocity in the Microcirculation [PDF]

Upsala Journal of Medical Sciences, 1975
A method for the measurement of red blood cell velocity in the microcirculation is described. The technique is based on the on-line cross-correlation of the delay between optical signatures derived from photodetectors aligned in direction oflow. A specialised photodiode holder which can be inserted directly in place of an ocular is described.
D. Bergqvist, B. Westergren, M. Intaglietta, K.-E. Arfors   +3 more
openaire   +3 more sources

Digital Image Processing for Determining the Speed of Blood Flow in the Heart Based on the Doppler Effect

JIF (Jurnal Ilmu Fisika), 2023
A research study was conducted to estimate and visualize 2D vectors of blood flow in the heart using image processing algorithms to determine Doppler velocity at each point.
Eif Sparzinanda, Sri Oktamuliani, Dian Fitriyani, Imam Taufiq   +3 more
doaj   +1 more source

The clinical spectrum of SMA‐PME and in vitro normalization of its cellular ceramide profile

Annals of Clinical and Translational Neurology, Volume 9, Issue 12, Page 1941-1952, December 2022., 2022
Abstract Objective The objectives of this study were to define the clinical and biochemical spectrum of spinal muscular atrophy with progressive myoclonic epilepsy (SMA‐PME) and to determine if aberrant cellular ceramide accumulation could be normalized by enzyme replacement.
Michelle M. Lee, Graeme S. V. McDowell, Darryl C. De Vivo, Daniel Friedman, Samuel F. Berkovic, Maria Spanou, Argirios Dinopoulos, Katheryn Grand, Pedro A. Sanchez‐Lara, Michelle Allen‐Sharpley, Jodi Warman‐Chardon, Alexander Solyom, Thierry Levade, Edward H. Schuchman, Steffany A. L. Bennett, David A. Dyment, Toni S. Pearson   +16 more
wiley   +1 more source

The acute effects of lower limb intermittent negative pressure on foot macro- and microcirculation in patients with peripheral arterial disease. [PDF]

PLoS ONE, 2017
BACKGROUND:Intermittent negative pressure (INP) applied to the lower leg and foot increases foot perfusion in healthy volunteers. The aim of the present study was to describe the effects of INP to the lower leg and foot on foot macro- and ...
Øyvind Heiberg Sundby, Lars Øivind Høiseth, Iacob Mathiesen, Harald Weedon-Fekjær, Jon O Sundhagen, Jonny Hisdal   +5 more
doaj   +1 more source

Early‐onset Alzheimer's disease shows a distinct neuropsychological profile and more aggressive trajectories of cognitive decline than late‐onset

Annals of Clinical and Translational Neurology, Volume 9, Issue 12, Page 1962-1973, December 2022., 2022
Abstract Objectives Early‐ and late‐onset Alzheimer's disease (EOAD and LOAD) share the same neuropathological traits but show distinct cognitive features. We aimed to explore baseline and longitudinal outcomes of global and domain‐specific cognitive function in a well characterized cohort of patients with a biomarker‐based diagnosis.
Adrià Tort‐Merino, Neus Falgàs, Isabel E. Allen, Mircea Balasa, Jaume Olives, José Contador, Magdalena Castellví, Jordi Juncà‐Parella, Núria Guillén, Sergi Borrego‐Écija, Bea Bosch, Guadalupe Fernández‐Villullas, Oscar Ramos‐Campoy, Anna Antonell, Lorena Rami, Raquel Sánchez‐Valle, Albert Lladó   +16 more
wiley   +1 more source

ISCHEMIA/REPERFUSION EFFECT ON PANCREATIC VOLUMETRICAL BLOOD FLOW VELOCITY [PDF]

Research Results in Pharmacology, 2015
We investigate blood flow velocity at ischemia/reperfusion early stages. Transient hyperemia absence after ischemia/reperfusion cased by pancreatic edema development at early stages confirmed by Wet/Dry ratio elevation and morphological changes was ...
Dmytry Kolmykov, Sergey Alehin
doaj   +3 more sources

Transcutaneous measurement of blood velocity profiles and flow [PDF]

Cardiovascular Research, 1973
A comprehensive report is presented of the application of a pulsed ultrasound Doppler velocity meter for transcutaneous measurement of time varying velocity, velocity profiles, and instantaneous flow in arteries of anaesthetized dogs. The procedure used to provide direct velocity and flow calibration using the Doppler equation is outlined.
Histand, Michael B, Miller, Charles W, McLeod, Francis D   +2 more
openaire   +4 more sources

The effect of increased preset intraocular pressure level on choroidal blood flow during phacoemulsification

Российский офтальмологический журнал, 2022
Purpose: to evaluate blood flow velocity in the posterior short ciliary arteries during phacoemulsification (PE) at different levels of intraocular pressure (IOP).Material and methods.
Yu. V. Takhtaev, T. N. Kiseleva, R. B. Shliakman   +2 more
doaj   +1 more source

Computational analysis of flow structures in turbulent ventricular blood flow associated with mitral valve intervention [PDF]

Frontiers in Physiology (2022) 752, 2021
Cardiac disease and clinical intervention may both lead to an increased risk for thrombosis events due to modified blood flow in the heart, and thereby a change in the mechanical stimuli of blood cells passing through the chambers of the heart. Specifically, the degree of platelet activation is influenced by the level and type of mechanical stresses in
arxiv   +1 more source