Open AccessThe application of modern radio-frequency excitation theory in nonhomogeneous fi eld magnetic resonance imaging
Author(s) -
Bida Zhang,
Weidong Wang,
Song Xiao-Yu,
Donglin Zu,
Lyu Hong-Yu,
Shanglian Bao
Publication year - 2003
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.52.1143
Subject(s) - excitation , radio frequency , pulse (music) , physics , signal (programming language) , magnetic resonance imaging , pulse sequence , nuclear magnetic resonance , nonlinear system , signal to noise ratio (imaging) , resonance (particle physics) , acoustics , computational physics , optics , computer science , atomic physics , telecommunications , medicine , quantum mechanics , detector , radiology , programming language
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