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.
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.
复制标题
腹壁运动程度与增强MRI图像质量的关系：半定量研究特别关注短暂性严重运动伪影的发生。
DOI：
10.1007/s11604-019-00896-2
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Kitao A.
中科院分区：
文献类型：
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作者：
Ikeno H;Kobayashi S;Kozaka K;Ogi T;Inoue D;Yoneda N;Yoshida K;Ohno N;Gabata T;Kitao A.
目的探讨腹部运动与对比增强（CE）MRI伪影的关系，以及动脉期的短暂伪影是否由短暂腹部运动（TAM）引起。腹部运动按呼吸波纹管波形分为3组（=波纹管等级，BG 1-3），MR图像质量（=伪影评分，AS）分别为造影前、动脉期和门静脉期1-5级。评价血糖与动脉粥样硬化的关系。结果在BG 3采集中，所有图像均显示AS> 2，而在BG 1采集中没有图像显示AS> 4。EOB无腹部运动（NAM）、轻度TAM、重度TAM动脉期出现的瞬态伪影分别为0/120、4/27、7/8，EGCM无腹部运动（NAM）、1/4、0/91。NAM在动脉期未观察到伪影，表明腹部运动是伪影产生的直接原因。
PurposeTo 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 methods325 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.ResultsIn 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.ConclusionImage 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.