Evidence map›Paper›PMID 33818186›Full record

ArticleJournal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism2021

Dilated perivascular space is related to reduced free-water in surrounding white matter among healthy adults and elderlies but not in patients with severe cerebral small vessel disease.

Yeerfan Jiaerken, Chunfeng Lian, Peiyu Huang, Xinfeng Yu, Ruiting Zhang, Shuyue Wang, Hui Hong, Xiao Luo, Pew-Thian Yap, Dinggang Shen and 1 more

Open access · greenAbstract read
In one paragraph

Article in Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
1.8field-weighted citation impact, top 17% of its field
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

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 27 citations in OpenAlex.

  1. Pooled it
  2. The role of glymphatic dysfunction in cerebral small vessel disease and vascular cognitive impairment, and therapeutic implications.International journal of stroke : official journal of the International Stroke Society · 2026
    Review
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  6. Article
  7. Review
  8. Article
  9. Article
  10. Diffusion Tensor Imaging in Neurofluids.Neuroimaging clinics of North America · 2025
    Review
  11. Imaging brain fluid dynamics and waste clearance involving perivascular spaces in cerebral small vessel disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Review
  12. Article
  13. Article
  14. Review
  15. Article
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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

11 authors at 3 institutions in 3 countries.

Yeerfan JiaerkenDepartment of Radiology, School of Medicine, Second Affiliated Hospital of Zhejiang University, Zhejiang, China.
Chunfeng LianDepartment of Radiology and BRIC, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
Peiyu HuangDepartment of Radiology, School of Medicine, Second Affiliated Hospital of Zhejiang University, Zhejiang, China.
Xinfeng YuDepartment of Radiology, School of Medicine, Second Affiliated Hospital of Zhejiang University, Zhejiang, China.
Ruiting ZhangDepartment of Radiology, School of Medicine, Second Affiliated Hospital of Zhejiang University, Zhejiang, China.
Shuyue WangDepartment of Radiology, School of Medicine, Second Affiliated Hospital of Zhejiang University, Zhejiang, China.
Hui HongDepartment of Radiology, School of Medicine, Second Affiliated Hospital of Zhejiang University, Zhejiang, China.
Xiao LuoDepartment of Radiology, School of Medicine, Second Affiliated Hospital of Zhejiang University, Zhejiang, China.
Pew-Thian YapDepartment of Radiology and BRIC, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
Dinggang ShenSchool of Biomedical Engineering, ShanghaiTech University, Shanghai, China.
Minming ZhangDepartment of Radiology, School of Medicine, Second Affiliated Hospital of Zhejiang University, Zhejiang, China.
Second Affiliated Hospital of Zhejiang University · CNUniversity of North Carolina at Chapel Hill · USKorea University · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Perivascular space facilitates cerebral interstitial water clearance. However, it is unclear how dilated perivascular space (dPVS) affects the interstitial water of surrounding white matter. We aimed to determine the presence and extent of changes in normal-appearing white matter water components around dPVS in different populations. Twenty healthy elderly subjects and 15 elderly subjects with severe cerebral small vessel disease (CSVD, with lacunar infarction 6 months before the scan) were included in our study. And other 28 healthy adult subjects were enrolled under a different scanning parameter to see if the results are comparable. The normal-appearing white matter around dPVS was categorized into 10 layers (1 mm thickness each) based on their distance to dPVS. We evaluated the mean isotropic-diffusing water volume fraction in each layer. We discovered a significantly reduced free-water content in the layers closely adjacent to the dPVS in the healthy elderlies. however, this reduction around dPVS was weaker in the CSVD subjects. We also discovered an elevated free-water content within dPVS. DPVS played different roles in healthy subjects or CSVD subjects. The reduced water content around dPVS in healthy subjects suggests these MR-visible PVSs are not always related to the stagnation of fluid.

Indexed as

AgedAged, 80 and overCerebral Small Vessel DiseasesFemaleGlymphatic SystemHealthy VolunteersHumansMaleMiddle AgedWaterWhite MatterWateragingcerebral small vessel diseasediffusionfree-waterPerivascular space

Identifiers

PMID33818186
PMCPMC8504939
OpenAlexW3145948343

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.