一种可拆装式的脑外科手术用磁共振成像线圈  

A Detachable Interventional Magnetic Resonance Imaging Coil for Cerebral Surgery

作　　者：乔立华 王文韬[2] 许跃[3] 王为民[3] 

机构地区：[1]华润万东医疗装备股份有限公司,北京100016 [2]北京大学软件与微电子学院,北京100871 [3]北京大学信息科学技术学院,量子电子学研究所,北京100871

出　　处：《波谱学杂志》2013年第1期21-28,共8页Chinese Journal of Magnetic Resonance

摘　　要：在临床磁共振成像(MRI)应用中,射频线圈的设计是非常关键的,针对不同的应用目的,合适的线圈能获得质量更好的图像.有的应用需要线圈提供均匀性较好的射频场,而有的应用则需要线圈在特定区域内提供高的信噪比(SNR).但是线圈很难同时得到好的射频场(B1场)、空间均匀性和高的SNR,需要根据实际应用情况进行折衷设计.针对MRI在脑外科手术中的应用特点,设计并制作了一种新颖的、适用于脑外科手术的MRI接收和发射共用射频线圈.该线圈采用可分拆式结构,在脑外科手术支架上可以进行反复组装和拆卸,减少了MRI对医生手术的影响.仿真结果和人体成像实验表明,该线圈能产生均匀的射频场、有较高的SNR和较大的成像范围,满足脑外科手术的需要.High-quality radio frequency （RF） coils are crucial for clinical magnetic reso- nance imaging （MRI）. However, it is often difficult to achieve a uniform B1 field and a high SNR simultaneously with traditionally-designed coils. In this article, we present an interventional transmitter-and-receiver RF coil for neurosurgery. This coil adopts a detachable structure that can be assembled and disassembled repeatedly on the neurosur- gery gantry to reduce the interference from MRI to surgery. The simulation results and imaging experiments demonstrated that this coil is capable of producing a uniform RF field, a high SNR and a large imaging range simultaneously to meet the requirements of clinical neurosurgery.

关 键 词：磁共振成像(MRI) 射频线圈 均匀性 信噪比(SNR) 脑外科手术 

分 类 号：O482.53[理学—固体物理]