Annu Int Conf IEEE Eng Med Biol Soc. 2021 Nov;2021:4099-4103. doi: 10.1109/EMBC46164.2021.9630326.
This study investigates the effects of EEG traces in B1 transmit field distortion in a 3T MRI. EEG is a non-invasive method to monitor brain activities. Although EEG monitors brain activities with a high temporal resolution, it has trouble localizing the signal source. The EEG-fMRI is the multimodal imaging method, but care is needed to use EEG while in MRI as EEG traces create the signal distortion to the MRI. To tackle this problem, resistive traces are developed using thin-film technology to reduce the signal distortion during MRI. Numerical simulation was used to estimate the amount of B1 transmit field distortion of NeoNet and copper-based EEG nets (CuNet - with and without current limiting resistors) compared with the case without EEG net (NoNet). The reduced B1 transmit field distortion is estimated in the case of NeoNet compared to the CuNets. NeoNet is an MR-compatible high-density EEG net designed for pediatric subjects. The proposed NeoNet traces will facilitate/enable such EEG/fMRI pediatric studies with mitigated artifacts, which in turn will help to move the pediatric EEG/fMRI field forward.Clinical Relevance-This study estimates the benefit of the thin-film based EEG net with reduced B1 transmit artifact for the multimodal study of EEG-fMRI. The results are compared with commercial EEG trace made with copper metal with current limiting resistors. It is reported that about 470,000 children are suffering from Epilepsy. The MR-compatible resistive EEG traces se EEG-fMRI has potential to be a valuable tool to help understand pediatric Epilepsy and move the pediatric EEG-fMRI field forward.
这项研究调查了脑电图（EEG）在 3T MRI 中 B1 发射场失真中的作用。EEG 是一种监测大脑活动的非侵入性方法。尽管 EEG 以高时间分辨率监测大脑活动，但它很难定位信号源。EEG-fMRI 是一种多模态成像方法，但在 MRI 中使用 EEG 时需要小心，因为 EEG 会对 MRI 产生信号失真。为了解决这个问题，采用薄膜技术开发了电阻式迹线，以减少 MRI 期间的信号失真。数值模拟用于估计与无 EEG 网（NoNet）相比，NeoNet 和基于铜的 EEG 网（CuNet-带和不带限流电阻器）的 B1 发射场失真量。与 CuNets 相比，NeoNet 的 B1 发射场失真量减少。NeoNet 是一种专为儿科患者设计的与磁共振兼容的高密度 EEG 网。提出的 NeoNet 迹线将有助于/使这种具有减轻伪影的 EEG/fMRI 儿科研究成为可能，这反过来将有助于推动儿科 EEG/fMRI 领域的发展。临床相关性-这项研究估计了基于薄膜的 EEG 网的好处，该网具有减少的 B1 发射伪影，用于 EEG-fMRI 的多模态研究。结果与带有限流电阻器的铜金属制成的商用 EEG 迹线进行了比较。据报道，约有 47 万名儿童患有癫痫。具有磁共振兼容性的电阻式 EEG 迹线 EEG-fMRI 有可能成为一种有价值的工具，有助于了解儿科癫痫并推动儿科 EEG/fMRI 领域的发展。
