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In vivo assessment of human brainstem cerebrovascular function: a multi-inversion time pulsed arterial spin labelling study

Warnert, Esther A., Harris, Ashley D., Murphy, Kevin ORCID:, Saxena, Neeraj ORCID:, Tailor, Neeta, Jenkins, Nigel S., Hall, Judith Elizabeth ORCID: and Wise, Richard Geoffrey ORCID: 2014. In vivo assessment of human brainstem cerebrovascular function: a multi-inversion time pulsed arterial spin labelling study. Journal of Cerebral Blood Flow and Metabolism 34 (6) , pp. 956-963. 10.1038/jcbfm.2014.39

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The brainstem (BS) is involved in critical physiologic processes, including control of cardiovascular and respiratory functions. This study implements a multi-inversion time pulsed arterial spin labelling (MTI PASL) imaging sequence that addresses the challenges of BS imaging and aims to measure normal and elevated BS perfusion in healthy volunteers. An initial experiment was performed to obtain the kinetic curve of the label in the BS and consequently to estimate the label arrival times and tissue perfusion in seven participants. A second experiment estimated the BS cerebral vascular reactivity (CVR) to hypercapnia in 10 participants. Images were acquired with a gradient-echo sequence with two spiral interleaves and short echo time (TE=2.7 ms). Data were analyzed with a two-compartment model, including a tissue and arterial component. In both experiments, perfusion in the BS was significantly lower than in cortical gray matter (repeated measures analysis of variance (RM-ANOVA), P<0.05), which is as expected since the BS consists of gray and white matter, the latter typically showing lower perfusion. The BS CVR found here is comparable to previous reports obtained with positron emission tomography (PET) imaging. Multi-inversion time pulsed ASL in combination with a two-compartment signal model can be used to assess BS perfusion and CVR.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Neuroscience and Mental Health Research Institute (NMHRI)
MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Cardiff University Brain Research Imaging Centre (CUBRIC)
Subjects: R Medicine > R Medicine (General)
R Medicine > RC Internal medicine
Publisher: SAGE Publications
ISSN: 0271-678X
Funders: Wellcome Trust
Date of First Compliant Deposit: 30 March 2016
Date of Acceptance: 27 January 2014
Last Modified: 12 Jun 2024 06:50

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