Evidence map›Paper›PMID 28393659›Full record

SynthesisJournal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism2018

Variability of physiological brain perfusion in healthy subjects - A systematic review of modifiers. Considerations for multi-center ASL studies.

Patricia Clement, Henk-Jan Mutsaerts, Lena Václavů, Eidrees Ghariq, Francesca B Pizzini, Marion Smits, Marjan Acou, Jorge Jovicich, Ritva Vanninen, Mervi Kononen and 5 more

Abstract readSystematic Review
In one paragraph

Synthesis in Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
69citing papers in PubMed, 4 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

69 citing papers in PubMed, 4 syntheses or guidelines pooled it.

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  8. Spatially and temporally progressive hypoperfusion in Alzheimer's disease revealed by normative modeling.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
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  10. Characterizing pre- and post-operative cerebral blood flow and transit time in pediatric moyamoya patients using multi-delay ASL and DSC MRI.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2025
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9 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

15 authors.

Patricia Clement1 Department of Radiology and nuclear medicine, Ghent University, Ghent, Belgium.
Henk-Jan Mutsaerts2 Cognitive Neurology Research Unit, Sunnybrook Healthy Sciences Centre, Toronto, Canada.
Lena Václavů3 Academic Medical Center, Amsterdam, the Netherlands.
Eidrees Ghariq4 Leiden University Medical Center, Leiden, the Netherlands.
Francesca B Pizzini5 University Hospital Verona, Verona, Italy.
Marion Smits6 Erasmus MC, Rotterdam, the Netherlands.
Marjan Acou1 Department of Radiology and nuclear medicine, Ghent University, Ghent, Belgium.
Jorge Jovicich7 Magnetic Resonance Imaging Laboratory Center for Mind/Brain Sciences, University of Trento, Mattarello, Italy.
Ritva Vanninen8 Kuopio University Hospital, Kuopio, Finland.
Mervi Kononen8 Kuopio University Hospital, Kuopio, Finland.
Roland Wiest9 University Hospital Bern, Bern, Switzerland.
Egill Rostrup10 Department of Diagnostics, Glostrup Hospital, University of Copenhagen, Denmark.
António J Bastos-Leite11 Department of Medical Imaging, University of Porto, Porto, Portugal.
Elna-Marie Larsson12 Uppsala University, Uppsala, Sweden.
Eric Achten1 Department of Radiology and nuclear medicine, Ghent University, Ghent, Belgium.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Quantitative measurements of brain perfusion are influenced by perfusion-modifiers. Standardization of measurement conditions and correction for important modifiers is essential to improve accuracy and to facilitate the interpretation of perfusion-derived parameters. An extensive literature search was carried out for factors influencing quantitative measurements of perfusion in the human brain unrelated to medication use. A total of 58 perfusion modifiers were categorized into four groups. Several factors (e.g., caffeine, aging, and blood gases) were found to induce a considerable effect on brain perfusion that was consistent across different studies; for other factors, the modifying effect was found to be debatable, due to contradictory results or lack of evidence. Using the results of this review, we propose a standard operating procedure, based on practices already implemented in several research centers. Also, a theory of 'deep MRI physiotyping' is inferred from the combined knowledge of factors influencing brain perfusion as a strategy to reduce variance by taking both personal information and the presence or absence of perfusion modifiers into account. We hypothesize that this will allow to personalize the concept of normality, as well as to reach more rigorous and earlier diagnoses of brain disorders.

Indexed as

BrainCerebrovascular CirculationHumansMagnetic Resonance ImagingMulticenter Studies as TopicPerfusion ImagingArterial spin labelingcerebral perfusiondeep MRI physiotypingphysiologyvariability

Identifiers

PMID28393659
PMCPMC6120130

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.