Evidence map›Paper›PMID 28689259›Full record

Observational studyNeuroradiology2017

Differential diagnosis of parkinsonism by a combined use of diffusion kurtosis imaging and quantitative susceptibility mapping.

Kenji Ito, Chigumi Ohtsuka, Kunihiro Yoshioka, Hiroyuki Kameda, Suguru Yokosawa, Ryota Sato, Yasuo Terayama, Makoto Sasaki

Abstract readObservational Study
PubMed Publisher
In one paragraph

Observational study in Neuroradiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 1 pooled it
4.9field-weighted citation impact, top 4% 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

33 citing papers in PubMed, 1 synthesis or guideline pooled it, 58 citations in OpenAlex.

  1. Pooled it
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  8. Substantia Nigra Iron Deposition in Lewy Body Disease: A Magnetic Resonance Imaging and Neuropathology Study.Movement disorders : official journal of the Movement Disorder Society · 2025
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  16. Direct comparison betweenNeuroImage · 2024
    Article
  17. Magnetic Susceptibility in Progressive Supranuclear Palsy Variants, Parkinson's Disease, and Corticobasal Syndrome.Movement disorders : official journal of the Movement Disorder Society · 2023
    Article
  18. The Role of Clinical Assessment in the Era of Biomarkers.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2023
    Review
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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

8 authors at 3 institutions in 1 country.

Kenji ItoDivision of Ultrahigh Field MRI, Institute for Biomedical Sciences, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate, 028-3694, Japan. keito@iwate-med.ac.jp.ORCID http://orcid.org/0000-0001-9745-0101
Chigumi OhtsukaDepartment of Neurology and Gerontology, Iwate Medical University, 19-1 Uchimaru, Morioka, Iwate, Japan.
Kunihiro YoshiokaDepartment of Radiology, Iwate Medical University, 19-1 Uchimaru, Morioka, Iwate, Japan.
Hiroyuki KamedaDepartment of Diagnostic and Interventional Radiology, Hokkaido University Hospital, N14 W5, Kita-ku, Sapporo, Hokkaido, Japan.
Suguru YokosawaResearch & Development Group, Hitachi, Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo, Japan.
Ryota SatoResearch & Development Group, Hitachi, Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo, Japan.
Yasuo TerayamaDepartment of Neurology and Gerontology, Iwate Medical University, 19-1 Uchimaru, Morioka, Iwate, Japan.
Makoto SasakiDivision of Ultrahigh Field MRI, Institute for Biomedical Sciences, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate, 028-3694, Japan.
Iwate Medical University · JPHitachi (Japan) · JPHokkaido University Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeWe investigated whether diffusion kurtosis imaging (DKI) and quantitative susceptibility mapping (QSM) could detect pathological changes that occur in Parkinson's disease (PD), multiple system atrophy with predominant parkinsonism (MSA-P) or predominant cerebellar ataxia (MSA-C), and progressive supranuclear palsy syndrome (PSPS) and thus be used for differential diagnosis that is often difficult.

methodsSeventy patients (41 with PD, 6 with MSA-P, 7 with MSA-C, 16 with PSPS) and 20 healthy controls were examined using a 3.0 T MRI scanner. From DKI and QSM data, we automatically obtained mean kurtosis (MK), fractional anisotropy (FA), and mean diffusivity (MD) values of the midbrain tegmentum (MBT), pontine crossing tract (PCT), and superior/middle cerebellar peduncles (CPs), which were used to calculate diffusion MBT/PCT ratios (dMPRs) and diffusion superior/middle CP ratios (dCPRs), as well as MS (magnetic susceptibility) values of the anterior/posterior putamen (PUa and PUp) and globus pallidus (GP).

resultsdMPRs of MK were significantly decreased in PSPS and increased in MSA-C compared with the other groups, while dCPRs of MK showed significant differences only between MSA-C and PD, PSPS, or control. MS values were significantly increased in the PUp of MSA-P and in the PUa and GP of PSPS compared with those in PD. The combined use of MK-dMPR and MS-PUp showed sensitivities of 83-100% and specificities of 81-100% for discriminating among the disease groups, respectively.

conclusionA quantitative assessment using DKI and QSM analyses, particularly MK-dMPR and MS-PUp values, can readily identify patients with parkinsonism.

Indexed as

AgedAged, 80 and overAnisotropyBrain MappingCase-Control StudiesDiagnosis, DifferentialDiffusion Magnetic Resonance ImagingFemaleHumansImage Interpretation, Computer-AssistedMaleMiddle AgedMultiple System AtrophyParkinsonian DisordersProspective StudiesSensitivity and SpecificityDiffusion kurtosis imagingMultiple system atrophyParkinson’s diseaseProgressive supranuclear palsy syndromeQuantitative susceptibility mapping

Identifiers

PMID28689259
OpenAlexW2732888192

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.