Evidence map›Paper›PMID 27598250›Full record

ArticlePloS one2016

Quantitative Susceptibility Mapping in Parkinson's Disease.

Christian Langkammer, Lukas Pirpamer, Stephan Seiler, Andreas Deistung, Ferdinand Schweser, Sebastian Franthal, Nina Homayoon, Petra Katschnig-Winter, Mariella Koegl-Wallner, Tamara Pendl and 7 more

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 125 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
125citing papers in PubMed, 3 pooled it
12.1field-weighted citation impact, top 1% 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

125 citing papers in PubMed, 3 syntheses or guidelines pooled it, 231 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Article
  5. Generating R2Medical physics · 2026
    Article
  6. Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Diagnostic Potential of Macromolecular Proton Fraction Mapping Combined with Quantitative Susceptibility Mapping as a Subcortical Biomarker for Parkinson's Disease.Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine · 2026
    Article
  13. Review
  14. Article
  15. Article
  16. Review
  17. Review
  18. Brain iron distribution in transdiagnostic mental health burden.PCN reports : psychiatry and clinical neurosciences · 2025
    Article
  19. Article
  20. Article

65 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

17 authors at 3 institutions in 3 countries.

Christian LangkammerDepartment of Neurology, Medical University of Graz, Graz, Austria.ORCID http://orcid.org/0000-0002-7097-9707
Lukas PirpamerDepartment of Neurology, Medical University of Graz, Graz, Austria.
Stephan SeilerDepartment of Neurology, Medical University of Graz, Graz, Austria.
Andreas DeistungMedical Physics Group, University Hospital-Friedrich Schiller University Jena, Jena, Germany.
Ferdinand SchweserBuffalo Neuroimaging Analysis Center, Department of Neurology, University at Buffalo, The State University of New York, Buffalo, NY, United States of America.
Sebastian FranthalDepartment of Neurology, Medical University of Graz, Graz, Austria.
Nina HomayoonDepartment of Neurology, Medical University of Graz, Graz, Austria.
Petra Katschnig-WinterDepartment of Neurology, Medical University of Graz, Graz, Austria.
Mariella Koegl-WallnerDepartment of Neurology, Medical University of Graz, Graz, Austria.
Tamara PendlDepartment of Neurology, Medical University of Graz, Graz, Austria.
Eva Maria StoegererDepartment of Neurology, Medical University of Graz, Graz, Austria.
Karoline WenzelDepartment of Neurology, Medical University of Graz, Graz, Austria.
Franz FazekasDepartment of Neurology, Medical University of Graz, Graz, Austria.
Stefan RopeleDepartment of Neurology, Medical University of Graz, Graz, Austria.
Jürgen Rainer ReichenbachMedical Physics Group, University Hospital-Friedrich Schiller University Jena, Jena, Germany.
Reinhold SchmidtDepartment of Neurology, Medical University of Graz, Graz, Austria.
Petra SchwingenschuhDepartment of Neurology, Medical University of Graz, Graz, Austria.
Medical University of Graz · ATFriedrich Schiller University Jena · DEBuffalo Psychiatric Center · US

Funding

University of Buffalo Clinical and Translational Science Institute - Supplement SchulyerUL1TR001412 · NCATS · STATE UNIVERSITY OF NEW YORK AT BUFFALO · PI MURPHY, TIMOTHY F · 2015 to 2024
$33.8M
Austrian Science Fund FWF KLI 523NCATS NIH HHS UL1 TR001412
6 · The paper itself

Abstract

backgroundQuantitative susceptibility mapping (QSM) and R2* relaxation rate mapping have demonstrated increased iron deposition in the substantia nigra of patients with idiopathic Parkinson's disease (PD). However, the findings in other subcortical deep gray matter nuclei are converse and the sensitivity of QSM and R2* for morphological changes and their relation to clinical measures of disease severity has so far been investigated only sparsely.

methodsThe local ethics committee approved this study and all subjects gave written informed consent. 66 patients with idiopathic Parkinson's disease and 58 control subjects underwent quantitative MRI at 3T. Susceptibility and R2* maps were reconstructed from a spoiled multi-echo 3D gradient echo sequence. Mean susceptibilities and R2* rates were measured in subcortical deep gray matter nuclei and compared between patients with PD and controls as well as related to clinical variables.

resultsCompared to control subjects, patients with PD had increased R2* values in the substantia nigra. QSM also showed higher susceptibilities in patients with PD in substantia nigra, in the nucleus ruber, thalamus, and globus pallidus. Magnetic susceptibility of several of these structures was correlated with the levodopa-equivalent daily dose (LEDD) and clinical markers of motor and non-motor disease severity (total MDS-UPDRS, MDS-UPDRS-I and II). Disease severity as assessed by the Hoehn & Yahr scale was correlated with magnetic susceptibility in the substantia nigra.

conclusionThe established finding of higher R2* rates in the substantia nigra was extended by QSM showing superior sensitivity for PD-related tissue changes in nigrostriatal dopaminergic pathways. QSM additionally reflected the levodopa-dosage and disease severity. These results suggest a more widespread pathologic involvement and QSM as a novel means for its investigation, more sensitive than current MRI techniques.

Indexed as

AgedAntiparkinson AgentsBrain MappingCase-Control StudiesFemaleGlobus PallidusHumansImage Interpretation, Computer-AssistedIronLevodopaMagnetic Resonance ImagingMaleMiddle AgedParkinson DiseaseRed NucleusSeverity of Illness IndexAntiparkinson AgentsIronLevodopa

Identifiers

PMID27598250
PMCPMC5012676
OpenAlexW2517121990

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.