Evidence map›Paper›PMID 28699215›Full record

ArticleEpilepsia2017

Automated T2 relaxometry of the hippocampus for temporal lobe epilepsy.

Gavin P Winston, Sjoerd B Vos, Jane L Burdett, M Jorge Cardoso, Sebastien Ourselin, John S Duncan

Abstract read
In one paragraph

Article in Epilepsia, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

29 citing papers in PubMed, 1 synthesis or guideline pooled it.

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  13. Combined quantitative T2 mapping and [European radiology · 2022
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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

6 authors.

Gavin P WinstonDepartment of Clinical and Experimental Epilepsy, UCL Institute of Neurology, London, United Kingdom.ORCID 0000-0001-9395-1478
Sjoerd B VosEpilepsy Society MRI Unit, Chalfont St Peter, United Kingdom.
Jane L BurdettDepartment of Clinical and Experimental Epilepsy, UCL Institute of Neurology, London, United Kingdom.
M Jorge CardosoTranslational Imaging Group, Centre for Medical Image Computing, UCL, London, United Kingdom.
Sebastien OurselinTranslational Imaging Group, Centre for Medical Image Computing, UCL, London, United Kingdom.
John S DuncanDepartment of Clinical and Experimental Epilepsy, UCL Institute of Neurology, London, United Kingdom.

Funding

Medical Research Council MR/M00841X/1Wellcome Trust
6 · The paper itself

Abstract

objectiveHippocampal sclerosis (HS), the most common cause of refractory temporal lobe epilepsy, is associated with hippocampal volume loss and increased T2 signal. These can be identified on quantitative imaging with hippocampal volumetry and T2 relaxometry. Although hippocampal segmentation for volumetry has been automated, T2 relaxometry currently involves subjective and time-consuming manual delineation of regions of interest. In this work, we develop and validate an automated technique for hippocampal T2 relaxometry.

methodsFifty patients with unilateral or bilateral HS and 50 healthy controls underwent T

resultsHippocampal T2 values were reliably determined using the automated method. There was a significant ipsilateral increase in T2 values in HS (p < 0.001), and a smaller but significant contralateral increase. The combination of hippocampal volumes and T2 values separated the groups well. There was a strong correlation between automated and manual methods for hippocampal T2 measurement (0.917 left, 0.896 right, both p < 0.001). Interscan reproducibility was superior for automated compared to manual measurements. SIGNIFICANCE: Automated hippocampal segmentation can be reliably extended to the determination of hippocampal T2 values, and a combination of hippocampal volumes and T2 values can separate subjects with HS from healthy controls. There is good agreement with manual measurements, and the technique is more reproducible on repeat scans than manual measurement. This protocol can be readily introduced into a clinical workflow for the assessment of patients with focal epilepsy.

Indexed as

AdolescentAdultAgedAutomationCase-Control StudiesEpilepsy, Temporal LobeFemaleHippocampusHumansMagnetic Resonance ImagingMaleMiddle AgedYoung AdultHippocampusMagnetic resonance imagingT2 relaxometryTemporal lobe epilepsy

Identifiers

PMID28699215
PMCPMC5599984

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Registered trials

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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.