Evidence map›Paper›PMID 34080744›Full record

SynthesisMagnetic resonance in medicine2021

Electric field calculation and peripheral nerve stimulation prediction for head and body gradient coils.

Peter B Roemer, Trevor Wade, Andrew Alejski, Charles A McKenzie, Brian K Rutt

Abstract readMeta-Analysis
In one paragraph

Synthesis in Magnetic resonance in medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing 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

7 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Evaluation of Peripheral Electrostimulation Thresholds in Human Model for Uniform Magnetic Field Exposure.International journal of environmental research and public health · 2021
    Article
  7. Article
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

5 authors.

Peter B RoemerRoemer Consulting, Lutz, Florida, USA.
Trevor WadeImaging Research Laboratories, Robarts Research Institute, London, Ontario, Canada.
Andrew AlejskiImaging Research Laboratories, Robarts Research Institute, London, Ontario, Canada.
Charles A McKenzieDepartment of Medical Biophysics, Western University, London, Ontario, Canada.
Brian K RuttDepartment of Radiology, Stanford University, Stanford, California, USA.ORCID 0000-0001-6516-0505

Funding

TRD4 - Ultrahigh Field Engineering and SafetyP41EB027061 · NIBIB · UNIVERSITY OF MINNESOTA · PI Gregory John Metzger · 2019 to 2026
$11.7M
Training and DisseminationP41EB015891 · NIBIB · STANFORD UNIVERSITY · PI GLOVER, GARY H · 2012 to 2019
$10.7M
Elementary Neuronal Ensembles to Whole Brain Networks: Ultrahigh Resolution Imaging of Function and Connectivity in Humans - SUPPLEMENTU01EB025144 · NIBIB · UNIVERSITY OF MINNESOTA · PI UGURBIL, KAMIL · 2017 to 2022
$9.7M
Accessing the Neuronal Scale: Designing the Next Generation of Compact Ultra High Field MRI Technology for Order-of-Magnitude Sensitivity Increase in Non-Invasive Human Brain MappingR01EB025131 · NIBIB · STANFORD UNIVERSITY · PI RUTT, BRIAN KEITH · 2017 to 2018
$989k
NIBIB NIH HHS P41 EB015891NIBIB NIH HHS P41 EB027061NIBIB NIH HHS R01 EB025131NIBIB NIH HHS U01 EB025144
6 · The paper itself

Abstract

purposeTo demonstrate and validate electric field (E-field) calculation and peripheral nerve stimulation (PNS) prediction methods that are accurate, computationally efficient, and that could be used to inform regulatory standards.

methodsWe describe a simplified method for calculating the spatial distribution of induced E-field over the volume of a body model given a gradient coil vector potential field. The method is easily programmed without finite element or finite difference software, allowing for straightforward and computationally efficient E-field evaluation. Using these E-field calculations and a range of body models, population-weighted PNS thresholds are determined using established methods and compared against published experimental PNS data for two head gradient coils and one body gradient coil.

resultsA head-gradient-appropriate chronaxie value of 669 µs was determined by meta-analysis. Prediction errors between our calculated PNS parameters and the corresponding experimentally measured values were ~5% for the body gradient and ~20% for the symmetric head gradient. Our calculated PNS parameters matched experimental measurements to within experimental uncertainty for 73% of ∆G

conclusionsWe have developed accurate and computationally efficient methods for prospectively determining PNS limits, with specific application to head gradient coils.

Indexed as

Magnetic Resonance ImagingPeripheral NervesElectricityElectric StimulationElectromagnetic FieldsHeadasymmetric and symmetric gradientE-fieldelectric fieldgradient coilhead gradientperipheral nerve stimulationPNS

Identifiers

PMID34080744
PMCPMC8651073

What OpenQuestion holds

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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.