Evidence map›Paper›PMID 23248580›Full record

ArticleFrontiers in neuroscience2012

Systematic Error in Hippocampal Volume Asymmetry Measurement is Minimal with a Manual Segmentation Protocol.

Baxter P Rogers, Julia M Sheffield, Andrew S Luksik, Stephan Heckers

Abstract read
In one paragraph

Article in Frontiers in neuroscience, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
–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

11 citing papers in PubMed.

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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

4 authors.

Baxter P RogersDepartment of Radiology and Radiological Sciences, Vanderbilt University Nashville, TN, USA ; Department of Biomedical Engineering, Vanderbilt University Nashville, TN, USA.
Julia M Sheffield
Andrew S Luksik
Stephan Heckers

Funding

Imaging Hippocampal Function in PsychosisR01MH070560 · NIMH · VANDERBILT UNIVERSITY MEDICAL CENTER · PI HECKERS, STEPHAN · 2005 to 2025
$7.2M
Training At The Interface of Psychology, Neuroscience, and GeneticsT32GM081739 · NIGMS · WASHINGTON UNIVERSITY · PI BARCH, DEANNA · 2007 to 2016
$2.1M
NIGMS NIH HHS T32 GM081739NIMH NIH HHS R01 MH070560
6 · The paper itself

Abstract

Hemispheric asymmetry of hippocampal volume is a common finding that has biological relevance, including associations with dementia and cognitive performance. However, a recent study has reported the possibility of systematic error in measurements of hippocampal asymmetry by magnetic resonance volumetry. We manually traced the volumes of the anterior and posterior hippocampus in 40 healthy people to measure systematic error related to image orientation. We found a bias due to the side of the screen on which the hippocampus was viewed, such that hippocampal volume was larger when traced on the left side of the screen than when traced on the right (p = 0.05). However, this bias was smaller than the anatomical right > left asymmetry of the anterior hippocampus. We found right > left asymmetry of hippocampal volume regardless of image presentation (radiological versus neurological). We conclude that manual segmentation protocols can minimize the effect of image orientation in the study of hippocampal volume asymmetry, but our confirmation that such bias exists suggests strategies to avoid it in future studies.

Indexed as

asymmetryasymmetry biashippocampusMRI volumetrysegmentation

Identifiers

PMID23248580
PMCPMC3521226

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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.