Evidence map›Paper›PMID 26921117›Full record

ArticleJournal of magnetic resonance imaging : JMRI2016

High slew-rate head-only gradient for improving distortion in echo planar imaging: Preliminary experience.

Ek T Tan, Seung-Kyun Lee, Paul T Weavers, Dominic Graziani, Joseph E Piel, Yunhong Shu, John Huston, Matt A Bernstein, Thomas K F Foo

Abstract read
In one paragraph

Article in Journal of magnetic resonance imaging : JMRI, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed, 1 pooled it
6.5field-weighted citation impact, top 3% 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

41 citing papers in PubMed, 1 synthesis or guideline pooled it, 66 citations in OpenAlex.

  1. Pooled it
  2. Cooldown and Ramp Test of a Low-Cryogen, Lightweight, Head-Only 7T MRI Magnet.IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee · 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

9 authors at 3 institutions in 2 countries.

Ek T TanGE Global Research, Niskayuna, New York, USA.
Seung-Kyun LeeCNIR, IBS and Department of Biomedical Engineering Sungkyunkwan University, Suwon, South Korea.
Paul T WeaversDepartment of Radiology, Mayo Clinic, Rochester, Minnesota, USA.
Dominic GrazianiGE Global Research, Niskayuna, New York, USA.
Joseph E PielGE Global Research, Niskayuna, New York, USA.
Yunhong ShuDepartment of Radiology, Mayo Clinic, Rochester, Minnesota, USA.
John HustonDepartment of Radiology, Mayo Clinic, Rochester, Minnesota, USA.
Matt A BernsteinDepartment of Radiology, Mayo Clinic, Rochester, Minnesota, USA.
Thomas K F FooGE Global Research, Niskayuna, New York, USA.
GE Global Research (United States) · USMayo Clinic · USSungkyunkwan University · KR

Funding

High Performance, Highly Deployable Head-Only MRI ScannerR01EB010065 · NIBIB · GENERAL ELECTRIC GLOBAL RESEARCH CTR · PI BERNSTEIN, MATTHEW A., FOO, THOMAS K · 2010 to 2015
$5.5M
NIBIB NIH HHS R01 EB010065
6 · The paper itself

Abstract

purposeTo investigate the effects on echo planar imaging (EPI) distortion of using high gradient slew rates (SR) of up to 700 T/m/s for in vivo human brain imaging, with a dedicated, head-only gradient coil. MATERIALS AND

methodsSimulation studies were first performed to determine the expected echo spacing and distortion reduction in EPI. A head gradient of 42-cm inner diameter and with asymmetric transverse coils was then installed in a whole-body, conventional 3T magnetic resonance imaging (MRI) system. Human subject imaging was performed on five subjects to determine the effects of EPI on echo spacing and signal dropout at various gradient slew rates. The feasibility of whole-brain imaging at 1.5 mm-isotropic spatial resolution was demonstrated with gradient-echo and spin-echo diffusion-weighted EPI.

resultsAs compared to a whole-body gradient coil, the EPI echo spacing in the head-only gradient coil was reduced by 48%. Simulation and in vivo results, respectively, showed up to 25-26% and 19% improvement in signal dropout. Whole-brain imaging with EPI at 1.5 mm spatial resolution provided good whole-brain coverage, spatial linearity, and low spatial distortion effects.

conclusionOur results of human brain imaging with EPI using the compact head gradient coil at slew rates higher than in conventional whole-body MR systems demonstrate substantially improved image distortion, and point to a potential for benefits to non-EPI pulse sequences. J. Magn. Reson. Imaging 2016;44:653-664.

Indexed as

ArtifactsBrainEcho-Planar ImagingEquipment DesignEquipment Failure AnalysisHumansImage EnhancementImage Interpretation, Computer-AssistedPilot ProjectsReproducibility of ResultsSensitivity and SpecificityTransducersecho planar imagingEPIhead-only gradient coilimage distortionslew rate

Identifiers

PMID26921117
PMCPMC4983491
OpenAlexW2301333274

What OpenQuestion holds

Textmetadata
LicenceTDM
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.