等效源法脑电三维成像技术研究

为了进一步完善近年出现的大脑皮层成像技术，本文基于等效源思想，对ＣＩＴ作了若干数值仿真研究。仿真结果表明，ＣＩＴ方法中测试球面上的分面目源既可为现行的径向极源，也可为点电源源；被成像的实际脑电源可以是偶极源，也可以是点电流源或四极源。

Three Dimensional Mapping of EEG by Equivalent Source Technique

In order to perfect the recently developed conical imaging technique (CIT), we have conducted a series of simulations and the results confirm that: (1) CIT is a special case of the general equivalent source technique ; (2) The distribution sources of CIT may not only be radial dipoles used in current references, but also be point currents; (3) the true sources may not only be dipoles , but also be point currents or quadrupoles. Apparently, these results are helpful for understanding the key to perfection of CIT and provide a theoretical base of its clinical application.