Li H, Xiao Y, Wang S, Li Y, Zhong X, Situ W, Xiao E, Zhang Z
Department of Radiology, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.
Department of Radiology and Imaging Sciences, Wesley Woods Health Center Emory University, Atlanta, GA 30329, USA.
Clin Radiol. 2017 Sep;72(9):800.e1-800.e6. doi: 10.1016/j.crad.2017.03.013. Epub 2017 May 2.
To investigate whether time-resolved imaging with interleaved stochastic trajectories (TWIST)-volumetric interpolated breath-hold examination (VIBE) hepatic arterial phase imaging technique improves image quality in patients experiencing transient severe motion (TSM) during abdominal magnetic resonance imaging (MRI) with gadolinium ethoxybenzyl diethylenetriaminepentaacetic acid (Gd-EOB-DTPA).
This retrospective study compares TSM in MRI images from 28 patients with focal liver lesions imaged with gadopentetic acid (Gd-DTPA) and 28 patients with focal liver lesions imaged with Gd-EOB-DTPA. Images were taken during the precontrast phase, five hepatic arterial phases acquired with a single breath-hold, portal venous phase, and late dynamic phase.
There was a significant difference in the mean motion scores for the arterial phase in Gd-EOB-DTPA cohort before, and after, enhancement (p<0.001); however, there was no significant difference in the Gd-DTPA cohort for the same (p<0.05). The mean motion scores in the five hepatic arterial phases in the Gd-EOB-DTPA cohort after enhancement were significantly higher than that in the Gd-DTPA cohort (p<0.001). TSM occurred significantly more frequently in the Gd-EOB-DTPA cohort (64.2%) than in the Gd-DTPA cohort (3.5%, p<0.001). The highest motion score in Gd-EOB-DTPA cohort occurred during the fourth arterial phase, which was significantly higher than the other four arterial phases after enhancement (p<0.001). Moderate and severe TSM (motion score ≥3) occurred mainly in the mid and mid-late arterial phase. All patients with arterial phase images affected by TSM (motion scores ≥3) had at least one arterial phase image with TSM score <3, which was of adequate image quality for diagnostic purposes.
The TWIST-VIBE hepatic arterial phase imaging technique can be used to acquire arterial images at abdominal MRI with Gd-EOB-DTPA, and these images have adequate quality for diagnosis in patients who are affected by TSM.
探讨采用交错随机轨迹的时间分辨成像（TWIST）-容积内插屏气检查（VIBE）肝动脉期成像技术，能否提高钆塞酸二钠（Gd-EOB-DTPA）腹部磁共振成像（MRI）期间出现短暂严重运动（TSM）患者的图像质量。
本回顾性研究比较了28例使用钆喷酸葡胺（Gd-DTPA）成像的局灶性肝病变患者与28例使用Gd-EOB-DTPA成像的局灶性肝病变患者MRI图像中的TSM情况。在对比剂前相、单次屏气采集的五个肝动脉相、门静脉相和延迟动态相期间采集图像。
Gd-EOB-DTPA队列中，增强前和增强后动脉期的平均运动评分存在显著差异（p<0.001）；然而，Gd-DTPA队列中则无显著差异（p<0.05）。Gd-EOB-DTPA队列增强后五个肝动脉相的平均运动评分显著高于Gd-DTPA队列（p<0.001）。Gd-EOB-DTPA队列中TSM的发生频率（64.2%）显著高于Gd-DTPA队列（3.5%，p<0.001）。Gd-EOB-DTPA队列中最高运动评分出现在第四动脉相，显著高于增强后的其他四个动脉相（p<0.001）。中度和重度TSM（运动评分≥3）主要发生在动脉相中晚期。所有动脉期图像受TSM影响（运动评分≥3）的患者，至少有一张动脉期图像的TSM评分<3，其图像质量足以用于诊断目的。
TWIST-VIBE肝动脉期成像技术可用于在使用Gd-EOB-DTPA的腹部MRI中采集动脉图像，且这些图像对受TSM影响的患者具有足够的诊断质量。
