Evidence map›Paper›PMID 26446146›Full record

ArticleNeuroradiology2016

Detection of changes in the periaqueductal gray matter of patients with episodic migraine using quantitative diffusion kurtosis imaging: preliminary findings.

Kenji Ito, Masako Kudo, Makoto Sasaki, Ayumi Saito, Fumio Yamashita, Taisuke Harada, Suguru Yokosawa, Ikuko Uwano, Hiroyuki Kameda, Yasuo Terayama

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Article in Neuroradiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 2 pooled it
1.7field-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

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3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 2 syntheses or guidelines pooled it, 28 citations in OpenAlex.

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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

10 authors at 3 institutions in 1 country.

Kenji ItoDivision of Ultra-High Field MRI, Institute for Biomedical Sciences, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate, 028-3694, Japan. keito@iwate-med.ac.jp.
Masako KudoDepartment of Neurology and Gerontology, Iwate Medical University, Iwate, Japan.
Makoto SasakiDivision of Ultra-High Field MRI, Institute for Biomedical Sciences, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate, 028-3694, Japan.
Ayumi SaitoDepartment of Neurology and Gerontology, Iwate Medical University, Iwate, Japan.
Fumio YamashitaDivision of Ultra-High Field MRI, Institute for Biomedical Sciences, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate, 028-3694, Japan.
Taisuke HaradaDepartment of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Hokkaido, Japan.
Suguru YokosawaResearch & Development Group, Hitachi, Ltd., Tokyo, Japan.
Ikuko UwanoDivision of Ultra-High Field MRI, Institute for Biomedical Sciences, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate, 028-3694, Japan.
Hiroyuki KamedaDivision of Ultra-High Field MRI, Institute for Biomedical Sciences, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate, 028-3694, Japan.
Yasuo TerayamaDepartment of Neurology and Gerontology, Iwate Medical University, Iwate, Japan.
Iwate Medical University · JPHitachi (Japan) · JPHokkaido University Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionThe periaqueductal gray matter (PAG) is considered to play an important role in generating migraine, but findings from imaging studies remain unclear. Therefore, we investigated whether diffusion kurtosis imaging (DKI) can detect changes in the PAG of migraine patients.

methodsWe obtained source images for DKI from 20 patients with episodic migraine and 20 healthy controls using a 3 T magnetic resonance imaging scanner. Mean kurtosis (MK), fractional anisotropy (FA), and mean diffusivity (MD) maps were generated, and the values of the PAG and other deep gray and white matter structures were automatically measured using an atlas-based region-of-interest analysis. The metrics of these structures were compared between the patients and controls.

resultsThe MK and MD values of the PAG were significantly increased in the migraine patients compared with the controls (p < 0.05). The FA values were not significantly different. There were no significant differences in the metrics of the other structures between the patients and controls. The MK values of the PAG were significantly positively correlated with both age and the untreated period in the patient group under univariate analysis (r = 0.53 and 0.56, respectively; p < 0.05) but not multivariate analysis.

conclusionsDKI detected significant increases in the MK and MD values of the PAG in patients with migraine, which suggests that structural changes in the PAG are associated with the pathophysiological mechanisms of migraine.

Indexed as

AdultCerebral AqueductDiffusion Tensor ImagingEcho-Planar ImagingFemaleGray MatterHumansMaleMigraine DisordersPilot ProjectsReproducibility of ResultsSensitivity and SpecificityYoung AdultDiffusion kurtosis imagingHeadacheMigrainePeriaqueductal gray matter

Identifiers

PMID26446146
OpenAlexW1881542429

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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.