Results 31 to 40 of about 32,185 (293)

The change in cerebrovascular reactivity between 3T and 7T measured using graded hypercapnia [PDF]

, 2010
Mapping cerebrovascular reactivity (CVR) to hypercapnia is important both clinically and for improved understanding of the haemodynamic properties of the BOLD effect.
Francis, Susan, Gowland, Penny A., Francis, S, Driver, Ian, Fisher, Joseph, Blockley, N, Blockley, Nicholas, Fisher, J, Gowland, P, Driver, I   +9 more
core   +1 more source

Breath holding for 20 s following extended expiration is a practical, effective and robust standard when measuring cerebrovascular reactivity in healthy adults using BOLD fMRI at 3 T

NeuroImage: Reports, 2021
Background and Purpose: BOLD fMRI is becoming the preferred modality to study cerebrovascular reactivity. Amongst the vasoactive stimuli to induce it, breath holding is considered equal to other methods but both cerebrovascular reserve measures and ...
Jörg Larsen, Kai Kallenberg, Johanna Rühlmann, Jürgen Baudewig, Eike A. Nickel, Michael Knauth, Peter Dechent   +6 more
doaj   +1 more source

Breath holding index in episodic primary headaches [PDF]

Vojnosanitetski Pregled, 2018
Background/Aim. Examination of cerebrovascular reactivity in patients with primary headaches is focused mainly on migraine, while the smaller number of studies deals with tensiontype and cluster headache, or comparison of cerebral haemodynamic in ...
Podgorac Ana, Petrušić Igor, Radojičić Aleksandra, Zidverc-Trajković Jasna   +3 more
doaj   +1 more source

Cerebrovascular Reactivity MRI Protocol - Figures

, 2017
Figures describing an MRI protocol, including tolerability and reproducibility, for measurement of cerebrovascular ...
Pernet, Cyril R, Marshall, Ian, Thrippleton, Michael, Blair, Gordon, Waiter, Gordon, Doubal, Fergus, Hamilton, Iona, Shi, Yulu, Andrews, Peter JD, Schwarzbauer, Christian, Wardlaw, Joanna   +10 more
core   +2 more sources

Optimal bispectral index level of sedation and cerebral oximetry in traumatic brain injury: a non-invasive individualized approach in critical care?

Intensive Care Medicine Experimental, 2022
Background Impaired cerebral autoregulation has been linked with worse outcomes, with literature suggesting that current therapy guidelines fail to significantly impact cerebrovascular reactivity.
Logan Froese, Alwyn Gomez, Amanjyot Singh Sainbhi, Carleen Batson, Trevor Slack, Kevin Y. Stein, Francois Mathieu, Frederick A. Zeiler   +7 more
doaj   +1 more source

Cerebrovascular pressure reactivity and brain tissue oxygen monitoring provide complementary information regarding the lower and upper limits of cerebral blood flow control in traumatic brain injury: a CAnadian High Resolution-TBI (CAHR-TBI) cohort study

Intensive Care Medicine Experimental, 2022
Background Brain tissue oxygen tension (PbtO2) and cerebrovascular pressure reactivity monitoring have emerged as potential modalities to individualize care in moderate and severe traumatic brain injury (TBI).
Alwyn Gomez, Mypinder Sekhon, Donald Griesdale, Logan Froese, Eleen Yang, Eric P. Thelin, Rahul Raj, Marcel Aries, Clare Gallagher, Francis Bernard, Andreas H. Kramer, Frederick A. Zeiler   +11 more
doaj   +1 more source

Cerebrovascular reactivity and white matter integrity [PDF]

Neurology, 2016
To compare the diffusion and perfusion MRI metrics of normal-appearing white matter (NAWM) with and without impaired cerebrovascular reactivity (CVR).Seventy-five participants with moderate to severe leukoaraiosis underwent blood oxygen level-dependent CVR mapping using a 3T MRI system with precise carbon dioxide stimulus manipulation.
Kevin, Sam, Boris, Peltenburg, John, Conklin, Olivia, Sobczyk, Julien, Poublanc, Adrian P, Crawley, Daniel M, Mandell, Lakshmikumar, Venkatraghavan, James, Duffin, Joseph A, Fisher, Sandra E, Black, David J, Mikulis   +11 more
openaire   +2 more sources

Relationship between oxygen supply and cerebral blood flow assessed by transcranial Doppler and near-infrared spectroscopy in healthy subjects during breath-holding [PDF]

, 2006
Background Breath – holding (BH) is a suitable method for inducing cerebral vasomotor reactivity (VMR). The assessment of VMR is of clinical importance for the early detection of risk conditions and for the follow-up of disabled patients.
LIBONI W, Molinari, Filippo, Negri, E., GRIPPI G, NEGRI E., Negri Emanuela, Molinari Filippo, Liboni, W., Grippi Gianfranco, Liboni William, Grippi, G.   +10 more
core   +1 more source

Intraoperative BOLD-fMRI Cerebrovascular Reactivity Assessment [PDF]

, 2021
Blood oxygenation-level dependent cerebrovascular reactivity (BOLD-CVR) has gained attention in recent years as an effective way to investigate CVR, a measure of the hemodynamic state of the brain, with high spatial and temporal resolution.
Regli, Luca, Christiaan Hendrik Bas van Niftrik, Sebök, Martina; https://orcid.org/, Esposito, Giuseppe, Muscas, Giovanni; https://orcid.org/, Giovanni Muscas, Martina Sebök, Giuseppe Esposito, Fierstra, Jorn, Luca Regli, Jorn Fierstra, van Niftrik, Christiaan Hendrik Bas   +11 more
core   +1 more source

The aging brain and cerebrovascular reactivity

NeuroImage, 2018
Cerebrovascular reactivity (CVR) is a measure of vascular response to a vasoactive stimulus, and can be used to assess the health of the brain vasculature. In this current study we used different analyses of BOLD fMRI responses to CO2 to provide a number of metrics including ramp and step CVR, speed of response and transfer function analysis (TFA).
Larissa McKetton, Olivia Sobczyk, James Duffin, Julien Poublanc, Kevin Sam, Adrian P. Crawley, Lakshmikumar Venkatraghavan, Joseph A. Fisher, David J. Mikulis   +8 more
openaire   +2 more sources