Mueller P R, Stark D D, Simeone J F, Saini S, Butch R J, Edelman R R, Wittenberg J, Ferrucci J T
Radiology. 1986 Dec;161(3):605-9. doi: 10.1148/radiology.161.3.3786706.
Nonferrous needles of pure brass, titanium, or copper, and ferrous needles of different alloys of stainless steel were analyzed for the size, area, and distribution of the image artifact created when the needles were placed in a 0.6-T magnet. Results demonstrated that a stainless steel prototype needle (type 316) would be visible on magnetic resonance images and would provide an artifact similar to that seen in computed tomographic-guided biopsies. Further testing of this prototype included assessment of the effect on the artifact when changes were made in annealing properties, gauge, length, needle-tip geometry, pulse sequence, and orientation relative to the magnetic field. To date, three human liver biopsies have been successfully and safely performed using a stainless steel type 316 needle.
对纯黄铜、钛或铜的有色金属针以及不同不锈钢合金的黑色金属针进行了分析，以研究将这些针置于0.6-T磁场中时产生的图像伪影的大小、面积和分布。结果表明，一种不锈钢原型针（316型）在磁共振图像上可见，并且会产生与计算机断层扫描引导活检中所见类似的伪影。对该原型针的进一步测试包括评估当退火特性、规格、长度、针尖几何形状、脉冲序列以及相对于磁场的方向发生变化时对伪影的影响。迄今为止，已使用316型不锈钢针成功且安全地进行了三例人体肝脏活检。
