摘要
目的:探讨磁共振成像(MRI)检查对先天性心脏病介入封堵所用封堵器位置的影响,并观察封堵器对MRI图像质量有无干扰。方法:将上海记忆合金材料有限公司产34 mm、26 mm房间隔缺损(ASD)封堵器、10 mm对称型、9 mm非对称型室间隔缺损(VSD)封堵器以及10 mm动脉导管未闭(PDA)封堵器分别置入盛有煮沸琼脂的透明非金属容器内,琼脂完全覆盖封堵器,冷却凝固成胶冻状,在MRI内行常规横断面、冠状面多轴面、多序列扫描。观察扫描后琼脂的完整性、封堵器位置的变化以及MRI图像质量。结果:扫描结束后,覆盖封堵器的琼脂表面光滑,完好无损;无论何种封堵器,其形态和位置均无任何变化;MRI冠状位、横断位扫描(T_1 WI、T_2 WI),封堵器中央层面均有轻度金属伪影,但伪影局限于封堵器轮廓内,靠边层面可清晰显示封堵器网格状结构。结论:本实验条件下,MRI常规扫描不会造成先天性心脏病封堵器位置的变化,封堵器也不影响MRI图像质量。
Objective：To investigate the influence of MRI examination on the position of closure devices for congenital heart diseases and to assess the effect of these devices on the image quality of MR1. Methods： Two atrial septal defect closure devices, 2 ventricular septal defect closure devices and 1 patent ductus arteriosus closure device were placed into a transparent non-metal container filled with boiling agar, with the agar completely covering the devices. The agar changed into glue after cooling, then the devices were sequentially scanned by MRI in transverse and coronal planes. The changes of agar integrity, the position of devices and the image quality were observed after scanning. Results： The surface of the agar covering the devices was smooth and had no breakage after the scanning. There was no change in the shape and position of all types of devices. The coronary, transverse scanning （Ta WI, TzWI） showed a few slight artifacts on the central layer, all within the contour of the device. The mesh of device near the edge was clearly showed. Conclusion： Under our experimental condition, MRI does not affect the position of closure devices for congenital heart diseases and the devices do not affect the MRI image quality.
出处
《第二军医大学学报》
CAS
CSCD
北大核心
2007年第8期898-900,共3页
Academic Journal of Second Military Medical University
关键词
心脏缺损
先天性
封堵器
磁共振成像
heart defects,congenital
closure device
magnetic resonance imaging
