Evidence map›Paper›PMID 27503308›Full record

ArticleMagma (New York, N.Y.)2017

Diffusion-weighted echo planar MR imaging of the neck at 3 T using integrated shimming: comparison of MR sequence techniques for reducing artifacts caused by magnetic-field inhomogeneities.

Sergios Gatidis, Hansjörg Graf, Jakob Weiß, Alto Stemmer, Berthold Kiefer, Konstantin Nikolaou, Mike Notohamiprodjo, Petros Martirosian

Abstract readComparative Study
PubMed Publisher
In one paragraph

Article in Magma (New York, N.Y.), 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing 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

16 citing papers in PubMed.

  1. Article
  2. Article
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  4. Article
  5. Review
  6. Article
  7. Article
  8. Integrated slice-specific dynamic shimming diffusion weighted imaging (DWI) for rectal Cancer detection and characterization.Cancer imaging : the official publication of the International Cancer Imaging Society · 2021
    Article
  9. Article
  10. Review
  11. Review
  12. Assessment of image quality of a radiotherapy-specific hardware solution for PET/MRI in head and neck cancer patients.Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology · 2018
    Article
  13. Voxel-wise correlation of functional imaging parameters in HNSCC patients receiving PET/MRI in an irradiation setup.Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al] · 2018
    Article
  14. Article
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  16. 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

8 authors.

Sergios GatidisDepartment of Radiology, Diagnostic and Interventional Radiology, University of Tübingen, Tübingen, Germany. sergios.gatidis@med.uni-tuebingen.de.ORCID http://orcid.org/0000-0002-6928-4967
Hansjörg GrafSiemens Healthcare GmbH, Erlangen, Germany.
Jakob WeißDepartment of Radiology, Diagnostic and Interventional Radiology, University of Tübingen, Tübingen, Germany.
Alto StemmerSiemens Healthcare GmbH, Erlangen, Germany.
Berthold KieferSiemens Healthcare GmbH, Erlangen, Germany.
Konstantin NikolaouDepartment of Radiology, Diagnostic and Interventional Radiology, University of Tübingen, Tübingen, Germany.
Mike NotohamiprodjoDepartment of Radiology, Diagnostic and Interventional Radiology, University of Tübingen, Tübingen, Germany.
Petros MartirosianDepartment of Radiology, Experimental Radiology, University of Tübingen, Tübingen, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveOur objective was to compare available techniques reducing artifacts in echo planar imaging (EPI)-based diffusion-weighed magnetic resonance imaging MRI (DWI) of the neck at 3 Tesla caused by B0-field inhomogeneities. MATERIALS AND

methodsA cylindrical fat-water phantom was equipped with a Maxwell coil allowing for additional linear B0-field variations in z-direction. The effect of increasing strength of this superimposed gradient on image quality was observed using a standard single-shot EPI-based DWI sequence (sEPI), a zoomed single-shot EPI sequence (zEPI), a readout-segmented EPI sequence (rsEPI), and an sEPI sequence with integrated dynamic shimming (intEPI) on a 3-Tesla system. Additionally, ten volunteers were examined over the neck region using these techniques. Image quality was assessed by two radiologists. Scan durations were recorded.

resultsWith increasing strength of the external gradient, marked distortions, signal loss, and failure of fat suppression were observed using sEPI, zEPI, and rsEPI. These artifacts were markedly reduced using intEPI. Significantly better in vivo image quality was also observed using intEPI compared with the other techniques. Scan time of intEPI was similar to sEPI and zEPI and shorter than rsEPI.

conclusionThe use of integrated 2D shim and frequency adjustment for EPI-based DWI results in a significant improvement in image quality of the head/neck region at 3 Tesla. Combining integrated shimming with rsEPI or zEPI can be expected to provide additional improvements.

Indexed as

Magnetic FieldsAdipose TissueAdultArtifactsDiffusion Magnetic Resonance ImagingEcho-Planar ImagingFemaleHumansImage EnhancementImage Interpretation, Computer-AssistedMalePhantoms, ImagingReproducibility of ResultsSignal-To-Noise RatioTomography, X-Ray ComputedWaterWaterArtifactsDiffusion weightedEcho-planar ImagingMRINeck

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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.