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01-02-2020 | Magnetic Resonance Imaging | Original Article

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

Authors: Hiroshi Ikeno, Satoshi Kobayashi, Kazuto Kozaka, Takahiro Ogi, Dai Inoue, Norihide Yoneda, Kotaro Yoshida, Naoki Ohno, Toshifumi Gabata, Azusa Kitao

Published in: Japanese Journal of Radiology | Issue 2/2020

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.

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Title: 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
Authors: Hiroshi Ikeno
Satoshi Kobayashi
Kazuto Kozaka
Takahiro Ogi
Dai Inoue
Norihide Yoneda
Kotaro Yoshida
Naoki Ohno
Toshifumi Gabata
Azusa Kitao
Publication date: 01-02-2020
Publisher: Springer Japan
Keywords: Magnetic Resonance Imaging
Magnetic Resonance Imaging
Published in: Japanese Journal of Radiology / Issue 2/2020
Print ISSN: 1867-1071
Electronic ISSN: 1867-108X
DOI: https://doi.org/10.1007/s11604-019-00896-2

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

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

Abstract

Purpose

Materials and methods

Results

Conclusion

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Purpose

Materials and methods

Results

Conclusion

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