%0 Journal Article
%T The application of modern radio-frequency excitation theory in nonhomogeneous fi eld magnetic resonance imaging<br>磁共振现代射频脉冲理论在非均匀场成像中的应用
%A 张必达
%A 王卫东
%A 宋枭禹
%A 俎栋林
%A 吕红宇
%A 包尚联
%J 物理学报
%D 2003
%I 
%X In the problem of nonhomogeneous field magnetic resonance imaging (MRI),echo peaks decay quickly due to traditional design of radio frequency (RF) pulse.In this article,using inverse scattering transform (IST) of the nonlinear dynamics and Shinnar-Le Roux selective excitation pulse design algorithm (SLR Algorithm),we have designed the RF pulse for the nonhomogeneous field MRI.Simulation has been made to test the signal loss induced by the excitation of different types of RF pulses.Simulation results show that the RF pulse sequence optimized by IST and SLR algorithm can improve the signal to noise ratio of MRI considerably
%K magnetic resonance imaging
%K radio frequency pulse
%K nonlinear dynamical systems<br>磁共振成像，
%K 射频脉冲，
%K 非线性系统
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=B45F9155DBBDC014&yid=D43C4A19B2EE3C0A&vid=286FB2D22CF8D013&iid=94C357A881DFC066&sid=CF89D3C02791C82E&eid=19E8BB8BE90732B2&journal_id=1000-3290&journal_name=物理学报&referenced_num=1&reference_num=11