全身磁共振血管造影：单次注射造影剂新 TimCT 技术的初步经验。

Whole-body MR angiography: first experiences with the new TimCT technology with single contrast injection.

机构信息

Institute for Diagnostic and Interventional Radiology, Johann Wolfgang Goethe University Hospital, Frankfurt University, Frankfurt, Germany; Department of Radiology, Faculty of Medicine, Alexandria University, Alexandria, Egypt.

出版信息

J Magn Reson Imaging. 2014 Feb;39(2):434-9. doi: 10.1002/jmri.24182. Epub 2013 May 16.

DOI:10.1002/jmri.24182

PMID:23681601

Abstract

PURPOSE

To assess image quality, presence of artifacts, arterial stenosis, and interobserver agreement of Tim-CT in assessment of the arterial system using contrast-enhanced whole-body-MRA (CE-Wb-MRA) with a single contrast-medium injection in patients with arteriosclerosis.

MATERIALS AND METHODS

The retrospective study included 18 patients (mean age, 68 years). A total of 468 arteries were evaluated. CE-Wb-MRA was performed using Tim-CT technology on a 1.5 Tesla (T) MRI after injecting a single dose of Vasovist. Evaluations were independently performed by two radiologists. The arterial system was divided into seven anatomic locations. Each radiologist assessed the image quality, degree of artifacts, and arterial stenosis in different locations.

RESULTS

All Wb-MRA examinations were technically successful. Image quality: 28.42% arteries were excellent, 29.17% were good, 22.54% were satisfactory, 9.40% were poor, and 5.13% of insufficient quality. Occurrence of artifacts: 37.25% were free of artifacts, 49.44% minimal artifacts not affecting diagnosis, and 13.31% strong artifacts not permitting a diagnosis. A total of 60.00% arteries showed no stenosis, 8.76% were ≤50% stenotic, 5.17% were 51-75% stenotic, 4.38% were 76-99%, and 8.54% total occlusion. The interobserver agreement was good for supra-aortic, pelvic, and upper and lower leg regions.

CONCLUSION

CE-Wb-MRA using the TimCT technology and with a single contrast injection is a feasible tool for whole-body MRA.

摘要

目的

使用单次对比剂注射的对比增强全身磁共振血管造影（CE-Wb-MRA）联合 Tim-CT 技术评估动脉硬化患者动脉系统的图像质量、伪影存在情况、动脉狭窄及观察者间一致性。

材料与方法

本回顾性研究纳入了 18 例患者（平均年龄 68 岁）。共评估了 468 条动脉。在 1.5T 磁共振成像仪上，使用 Vasovist 单次注射后，行 Tim-CT 技术 CE-Wb-MRA。由两名放射科医生独立进行评估。将动脉系统分为 7 个解剖部位。每位放射科医生评估不同部位的图像质量、伪影程度和动脉狭窄程度。

结果

所有 Wb-MRA 检查均技术成功。图像质量：28.42%的动脉为优秀，29.17%为良好，22.54%为满意，9.40%为较差，5.13%为质量不足。伪影的发生：37.25%无伪影，49.44%为不影响诊断的轻微伪影，13.31%为影响诊断的强伪影。总的来说，60.00%的动脉无狭窄，8.76%狭窄≤50%，5.17%狭窄 51-75%，4.38%狭窄 76-99%，8.54%为完全闭塞。对于主动脉、骨盆、上下肢区域，观察者间一致性良好。