Evidence map›Paper›PMID 30145396›Full record

ArticleNeurobiology of aging2018

Re-examining age-related differences in white matter microstructure with free-water corrected diffusion tensor imaging.

Jordan A Chad, Ofer Pasternak, David H Salat, J Jean Chen

Abstract read
In one paragraph

Article in Neurobiology of aging, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 78 papers.

0numbers the graph read from it
0cells of the map it votes in
78citing papers in PubMed
7.9field-weighted citation impact, top 2% 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

78 citing papers in PubMed, 120 citations in OpenAlex.

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  13. Reduced myelin contributes to cognitive impairment in patients with monogenic small vessel disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article
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  15. Metabolite TMagnetic resonance in medicine · 2025
    Article
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18 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

4 authors at 4 institutions in 2 countries.

Jordan A ChadRotman Research Institute, Baycrest Health Sciences, Toronto, Ontario, Canada; Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada. Electronic address: jchad@research.baycrest.org.
Ofer PasternakDepartments of Psychiatry and Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
David H SalatMGH/HST Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA; Neuroimaging Research for Veterans Center, Boston VA, VA Healthcare System, Boston, MA, USA.
J Jean ChenRotman Research Institute, Baycrest Health Sciences, Toronto, Ontario, Canada; Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada.
Athinoula A. Martinos Center for Biomedical Imaging · USBaycrest Hospital · CABrigham and Women's Hospital · USUniversity of Toronto · CA

Funding

Training and DisseminationP41EB015902 · NIBIB · BRIGHAM AND WOMEN'S HOSPITAL · PI PUJOL, SONIA · 2012 to 2022
$20.9M
Neuroimaging Biomarkers for disease-modyfying therapies in Hintington's diseaseP01NS058793 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI HERSCH, STEVEN M · 2008 to 2012
$6.6M
Neural substrates of diffusion imaging in cognitively aging rhesus monkeysR01AG042512 · NIA · BRIGHAM AND WOMEN'S HOSPITAL · PI KUBICKI, MAREK, MAKRIS, NIKOLAOS · 2013 to 2023
$6.5M
Prospective Neuroimaging in Huntington's DiseaseR01NS042861 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI ROSAS, HERMINIA DIANA · 2003 to 2013
$5.6M
Cerebrovascular Contributions to Brain Aging and DementiaR01NR010827 · NINR · MASSACHUSETTS GENERAL HOSPITAL · PI SALAT, DAVID H · 2007 to 2017
$5.0M
Next Generation Diffusion MRI Biomarkers for Prodromal SchizophreniaR01MH108574 · NIMH · BRIGHAM AND WOMEN'S HOSPITAL · PI PASTERNAK, OFER · 2016 to 2020
$2.2M
Prospective Neuroimaging in Huntington's DiseaseR56NS042861 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI ROSAS, HERMINIA DIANA · 2014 to 2014
$870k
NIA NIH HHS R01 AG042512NIBIB NIH HHS P41 EB015902NIMH NIH HHS R01 MH108574NINDS NIH HHS P01 NS058793NINDS NIH HHS R01 NS042861NINDS NIH HHS R56 NS042861NINR NIH HHS R01 NR010827
6 · The paper itself

Abstract

Diffusion tensor imaging (DTI) has been used extensively to investigate white matter (WM) microstructural changes during healthy adult aging. However, WM fibers are known to shrink throughout the lifespan, leading to larger interstitial spaces with age. This could allow more extracellular free water molecules to bias DTI metrics, which are relied upon to provide WM microstructural information. Using a cohort of 212 participants, we demonstrate that WM microstructural changes in aging are potentially less pronounced than previously reported once the free water compartment is eliminated. After free water elimination, DTI parameters show age-related differences that match histological evidence of myelin degradation and debris accumulation. The fraction of free water is further shown to associate better with age than any of the conventional DTI parameters. Our findings suggest that DTI analyses involving free water are likely to yield novel insight into retrospective re-analysis of data and to answer new questions in ongoing DTI studies of brain aging.

Indexed as

AgingAdultAgedAged, 80 and overBrainDiffusion Magnetic Resonance ImagingDiffusion Tensor ImagingFemaleHumansImage Processing, Computer-AssistedMaleMiddle AgedWaterWhite MatterWaterDiffusion tensor imagingFree waterHealthy adult agingMagnetic resonance imagingWhite matter

Identifiers

PMID30145396
PMCPMC6179151
OpenAlexW2887719417

What OpenQuestion holds

Textmetadata
LicenceTDM
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.