MAGNETIC-FIELD EFFECTS ON SURGICAL LIGATION CLIPS

被引：32

作者：

BROWN, MA ^{[1
]}

CARDEN, JA ^{[1
]}

COLEMAN, RE ^{[1
]}

MCKINNEY, R ^{[1
]}

SPICER, LD ^{[1
]}

机构：

[1] DUKE UNIV, MED CTR, DEPT RADIOL, BOX 3711, DURHAM, NC 27710 USA

来源：

MAGNETIC RESONANCE IMAGING | 1987年 / 5卷 / 06期

关键词：

D O I：

10.1016/0730-725X(87)90378-X

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Magnetic forces exerted on surgical clips and the magnetic resonance imaging distortion they create in phantoms and rabbits at magnetic field strengths of 1.5 Tesla were investigated. Results are reported for both ligation and aneurysm clips manufactured from three types of stainless steel as well as titanium, tantalum and niobium metals. Paramagnetism and eddy currents were measured in a customized moving Gouy balance. Direct measurements of other magnetic forces were carried out in a 1.5T MRI system. The titanium and tantalum clips showed the least interaction with the magnetic field, both in terms of forces exerted and the observed image distortiom with the larger clips generating the larger interactions. The strongest field distortions and attractive forces occurred with 17-7PH stainless steel clips. These interactions were ferromagnetic in origin and of sufficient strength to present significant risk to patients having this type of clip present during an MRI scan.

引用

页码：443 / 453

页数：11