Evidence map›Paper›PMID 19144489›Full record

ArticleMagnetic resonance imaging2009

Accounting for nonspecific enhancement in neuronal tract tracing using manganese enhanced magnetic resonance imaging.

Kai-Hsiang Chuang, Alan P Koretsky

Abstract read
In one paragraph

Article in Magnetic resonance imaging, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing 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

19 citing papers in PubMed.

  1. Quality Assurance Strategies for Brain State Characterization by MEMRI.bioRxiv : the preprint server for biology · 2026
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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

2 authors.

Kai-Hsiang ChuangLaboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA. chuangk@ninds.nih.gov
Alan P Koretsky

Funding

Functional Imaging of The BrainZIANS002989 · NINDS · NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE · PI KORETSKY, ALAN · 2009 to 2025
$41.5M
MRI contrast for molecular and cellular imaging of the brainZIANS003047 · NINDS · NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE · PI KORETSKY, ALAN · 2009 to 2025
$29.3M
FUNCTIONAL IMAGING OF THE BRAIN AND HEARTZ01NS002989 · NINDS · NEUROLOGICAL DISORDERS AND STROKE · PI KORETSKY, ALAN P. · 2000 to 2008
$5.0M
ULTRA FAST IMAGING TECHNIQUESP41RR003631 · NCRR · MELLON PITTS CORPORATION (MPC CORP) · PI HO, CHIEN · 1988 to 2002
$2.7M
Intramural NIH HHS Z01 NS002989NCRR NIH HHS P41 RR003631
6 · The paper itself

Abstract

Manganese enhanced MRI (MEMRI) is an emerging technique for tracing neuronal pathways in vivo. However, manganese may leak into blood vessels or cerebrospinal fluid (CSF) after local injection and can be circulated to and taken up by brain regions that may not have connections to the targeted pathways. Comparing enhancement time courses after intranasal injection with intravenous infusion of MnCl(2) in rats, the early enhancements in the pituitary gland (Pit) and hippocampus indicate the contrasts in those regions in the olfactory tract-tracing experiment were caused by such systemic effects. Since the Pit has easy access to manganese from the blood and its signal is proportional to other brain regions after intravenous infusion, it was used as an internal reference for the systemic effects. Applying intensity normalization by the Pit signal to tract-tracing data from the olfactory bulb led to reduced contrast in the hippocampus. These results demonstrate that nonspecific enhancements in MEMRI tract-tracing studies may have to be taken into account and that normalization by the Pit signal can compensate these effects.

Indexed as

ChloridesManganese CompoundsAnimalsArtifactsContrast MediaHippocampusImage EnhancementMagnetic Resonance ImagingMaleNerve Fibers, MyelinatedOlfactory PathwaysPituitary GlandRatsRats, Sprague-DawleyChloridesContrast Mediamanganese chlorideManganese Compounds

Identifiers

PMID19144489
PMCPMC2766048

What OpenQuestion holds

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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.