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Relationship between the degree of abdominal wall movement and the image quality of contrast-enhanced MRI: semi-quantitative study especially focused on the occurrence of transient severe motion artifact

  • Hiroshi Ikeno
  • Satoshi KobayashiEmail author
  • Kazuto Kozaka
  • Takahiro Ogi
  • Dai Inoue
  • Norihide Yoneda
  • Kotaro Yoshida
  • Naoki Ohno
  • Toshifumi Gabata
  • Azusa Kitao
Original Article

Abstract

Purpose

To reveal the relationship between abdominal movement and artifact, and to reveal if the transient artifact in arterial phase is caused by transient abdominal movement (TAM) in contrast-enhanced (CE) MRI.

Materials and methods

325 CE-MRI series (206 with EOB and 119 with EGCM) were included. The abdominal movement was classified into three groups by respiratory bellows waveform (= bellows grade, BG 1–3), and MR image quality (= artifact score, AS) was graded 1–5 for the precontrast, arterial and portal venous phase, respectively. The relationship between the BG and AS was evaluated. The occurrence of transient artifact in arterial phase was compared to the degree of TAM.

Results

In the acquisitions with BG3, all images showed AS of > 2, while no images had AS of > 4 in the acquisitions with BG1. Numbers of transient artifact in the arterial phase with no-abdominal movement (NAM), mild-TAM, severe-TAM were 0 of 120, 4 of 27, 7 of 8 in EOB and 0 of 91, 1 of 4, 0 of 0 in EGCM, respectively.

Conclusion

Image quality is highly correlated with abdominal movement. Moreover, artifact in arterial phase was not observed in NAM, which indicated abdominal movement is the direct cause of artifact.

Keywords

Magnetic resonance imaging (MRI) Gd-EOB-DTPA Liver Transient severe motion Artifact (TSM) Respiratory bellows 

Notes

Acknowledgements

This research was supported by JSPS KAKENHI Grant number JP18K07669.

Compliance with ethical standards

Conflict of interest

All the authors and our institution have no conflict of interest.

Ethical approval

This manuscript has not been published and is not under consideration for publication elsewhere. All the authors have read the manuscript and have approved this submission (Responsible authority of our Departments, Toshifumi Gabata, is one of the authors and explicitly approved this submission).

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Copyright information

© Japan Radiological Society 2019

Authors and Affiliations

  1. 1.Department of RadiologyKanazawa University Graduate School of Medical SciencesKanazawaJapan
  2. 2.Department of Quantum Medical TechnologyKanazawa University Graduate School of Medical SciencesKanazawaJapan

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