Results 41 to 50 of about 66,223 (392)

Arterial spin labeling in neuroimaging

open access: yesWorld Journal of Radiology, 2010
Arterial spin labeling (ASL) is a magnetic resonance imaging technique for measuring tissue perfusion using a freely diffusible intrinsic tracer. As compared with other perfusion techniques, ASL offers several advantages and is now available for routine clinical practice in many institutions. Its noninvasive nature and ability to quantitatively measure
Sasitorn, Petcharunpaisan   +2 more
openaire   +2 more sources

Interactive effects of vascular risk burden and advanced age on cerebral blood flow. [PDF]

open access: yes, 2014
Vascular risk factors and cerebral blood flow (CBF) reduction have been linked to increased risk of cognitive impairment and Alzheimer's disease (AD); however the possible moderating effects of age and vascular risk burden on CBF in late life remain ...
Bangen, Katherine J   +10 more
core   +1 more source

Altered hippocampal function in major depression despite intact structure and resting perfusion [PDF]

open access: yes, 2016
Background: Hippocampal volume reductions in major depression have been frequently reported. However, evidence for functional abnormalities in the same region in depression has been less clear.
A. Finkelmeyer   +18 more
core   +2 more sources

Non-contrast quantitative study of brain perfusion changes in multiple sclerosis [PDF]

open access: yesDigital Diagnostics
BACKGROUND: Non-contrast magnetic resonance perfusion can identify areas of cerebral perfusion changes in patients with multiple sclerosis, even in the absence of focal lesions [1]. This technique offers several advantages, including non-invasiveness [2]
Vladimir V. Popov   +3 more
doaj   +1 more source

Decreased cerebral blood flow in chronic pediatric mild TBI: an MRI perfusion study [PDF]

open access: yes, 2015
We evaluated cerebral blood flow (CBF) in chronic pediatric mild traumatic brain injury (mTBI) using arterial spin labeling (ASL) magnetic resonance imaging perfusion. mTBI patients showed lower CBF than controls in bilateral frontotemporal regions, with
Arnold, Todd W.   +8 more
core   +1 more source

Evaluation of Nidus Occlusion After Radiosurgery in Brain Arteriovenous Malformations—A Prospective Study Using Arterial Spin Labeling [PDF]

open access: hybridNeurosurgery
Dorian Hirschmann   +11 more
openalex   +2 more sources

The effects of hemodynamic lag on functional connectivity and behavior after stroke [PDF]

open access: yes, 2015
Stroke disrupts the brain's vascular supply, not only within but also outside areas of infarction. We investigated temporal delays (lag) in resting state functional magnetic resonance imaging signals in 130 stroke patients scanned two weeks, three months
Corbetta, Maurizio   +4 more
core   +1 more source

Prematurity and brain perfusion: Arterial spin labeling MRI

open access: yesNeuroImage: Clinical, 2017
Purpose: Abnormal brain perfusion is a critical mechanism in neonatal brain injury. The aim of the present study was to compare Cerebral Blood Flow (CBF) evaluated with ASL MRI in three groups of neonates: preterms without brain lesions on MRI (PN ...
Domenico Tortora   +7 more
doaj   +1 more source

Potential use of oxygen as a metabolic biosensor in combination with T2*-weighted MRI to define the ischemic penumbra [PDF]

open access: yes, 2008
We describe a novel magnetic resonance imaging technique for detecting metabolism indirectly through changes in oxyhemoglobin:deoxyhemoglobin ratios and T2* signal change during ‘oxygen challenge’ (OC, 5 mins 100% O2). During OC, T2* increase reflects O2
Barrie Condon   +14 more
core   +1 more source

Effective treatment of severe stenosis of the carotid and coronary arteries: a case study

open access: yesJournal of Cardiothoracic Surgery, 2023
It is considered acceptable to conservatively manage coronary artery bypass grafting patients with carotid artery disease without the need for preoperative corrective carotid revascularization.
Kayo Sugiyama   +5 more
doaj   +1 more source

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