Institute of Man-Machine and Environmental Engineering, School of Aerospace, Tsinghua University, Beijing, People's Republic of China.
J Neural Eng. 2013 Apr;10(2):026013. doi: 10.1088/1741-2560/10/2/026013. Epub 2013 Feb 21.
Deep brain stimulating (DBS) is a rapidly developing therapy that can treat many refractory neurological diseases. However, the traditional DBS electrodes which are made of Pt-Ir alloy may induce severe field distortions in magnetic resonance imaging (MRI) which leads to artifacts that will lower the local image quality and cause inconvenience or interference. A novel DBS electrode made from carbon nanotube yarns (CNTYs) is brought up to reduce the artifacts. This study is therefore to evaluate the artifact properties of the novel electrode.
We compared its MR artifact characteristics with the Pt-Ir electrode in water phantom, including its artifact behaviors at different orientations as well as at various off-center positions, using both spin echo (SE) and gradient echo (GE) sequences, and confirmed its performance in vivo.
The results in phantom showed that the CNTY electrode artifacts reduced as much as 62% and 74% on GE and SE images, respectively, compared to the Pt-Ir one. And consistent behaviors were confirmed in vivo. The susceptibility difference was identified as the dominant cause in producing artifacts.
Employing the CNTY electrode may generate much less field distortion in the vicinity, improve local MR image quality and possibly be beneficial in various aspects.
深部脑刺激（DBS）是一种快速发展的治疗方法，可以治疗许多难治性神经疾病。然而，传统的铂-铱合金 DBS 电极可能会在磁共振成像（MRI）中引起严重的场扭曲，导致伪影，从而降低局部图像质量，并造成不便或干扰。一种由碳纳米管纱线（CNTYs）制成的新型 DBS 电极被提出以减少伪影。因此，本研究旨在评估新型电极的伪影特性。
我们在水模体中比较了它与铂-铱电极的磁共振伪影特征，包括在不同取向以及在不同偏心位置的伪影行为，使用自旋回波（SE）和梯度回波（GE）序列，并在体内证实了其性能。
在体模中的结果表明，与铂-铱电极相比，CNTY 电极在 GE 和 SE 图像上的伪影分别减少了 62%和 74%。并在体内得到了一致的验证。磁敏感性差异被确定为产生伪影的主要原因。
使用 CNTY 电极可能会在附近产生更小的场扭曲，提高局部磁共振图像质量，并可能在各个方面受益。
