Purpose

To identify predictive factors for truncation artifacts (TAs) in the arterial phase of Gd-EOB-DTPA-enhanced MRI in a multicenter study in Japan.

Materials and methods

Data on patient factors (age, sex, weight, presence of viral hepatitis, and other conditions) and imaging parameters (e.g., triggering, voxel size, matrix, k-space ordering, acquisition time, reduction factor, flip angle, fat suppression, field strength, injection rate, and saline volume) were obtained. Univariate and multivariate analyses were performed to investigate the correlation of these parameters.

Results

We evaluated 1444 patients from 43 institutions who were scanned using GE, Siemens, Philips, or Toshiba MRI equipment (501, 354, 349, and 240 patients, respectively). The total incidence of TAs was 12.5% (17.2, 3.6, 15.7, and 12.1%, respectively). The matrix [odds ratio (OR) 0.13], flip angle (OR 5.77), use of fat suppression (OR 0.106), and field strength (OR 0.092) used in the Philips equipment significantly increased the incidence of TAs in MRI examination.

Conclusions

The incidence of TAs in the arterial phase is influenced by several patient factors and imaging parameters. Especially, Siemens and Toshiba equipment had a significantly lower frequency of TAs. This indicates that such vendor-specific technology used in the dynamic sequence may have a TA-resistant effect.

中文翻译：

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Gd-EOB-DTPA增强MRI动脉期截断伪影的预测因素：一项全国性的多中心研究

目的

在日本的一项多中心研究中，确定Gd-EOB-DTPA增强MRI的动脉期截短伪影（TAs）的预测因素。

材料和方法

有关患者因素（年龄，性别，体重，病毒性肝炎的存在和其他状况）和成像参数（例如触发，体素大小，矩阵，k空间排序，获取时间，缩小系数，翻转角度，脂肪抑制，获得了磁场强度，注入速率和盐水体积。进行单变量和多变量分析以研究这些参数的相关性。

结果

我们评估了来自43个机构的1444名患者，这些患者使用GE，西门子，飞利浦或东芝MRI设备进行了扫描（分别为501、354、349和240名患者）。TA的总发生率为12.5％（分别为17.2％，3.6％，15.7％和12.1％）。Philips设备中使用的矩阵[比值比（OR）0.13]，翻转角（OR 5.77），使用脂肪抑制（OR 0.106）和场强（OR 0.092）显着增加了MRI检查中TA的发生率。

结论

动脉期TA的发生率受多种患者因素和影像学参数的影响。特别是，西门子和东芝设备的TA频率明显较低。这表明在动态序列中使用的此类特定于供应商的技术可能具有抗TA的作用。