Title :
An iterative technique for refinement of RF pulses for magnetic resonance imaging
Author :
Lebsack, Eliot T. ; Wright, Steven M.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
30 Oct-2 Nov 1997
Abstract :
Recent advances in non-Fourier-based magnetic resonance imaging (MRI) methods have treated a need for spatially-selective RF pulses. In applications such as wavelet encoded imaging, narrow profile excitations are necessary for effective image reconstructions. In this paper we discuss problems with Fourier-based imaging, and then present an iterative technique which is implemented on a host imaging computer. This method of RF pulse optimization produces considerably accurate pulses for certain target profiles
Keywords :
Haar transforms; biomedical MRI; image reconstruction; iterative methods; medical image processing; wavelet transforms; Fourier-based imaging problems; Haar wavelet; RF pulse optimization; effective image reconstruction; inverse FT; iterative technique; magnetic resonance imaging; narrow profile excitations; refinement of RF pulses; spatially-selective RF pulses; wavelet encoded imaging; Equations; Fourier transforms; Linearity; Magnetic resonance imaging; Magnetization; Optimization methods; Pulse shaping methods; RF signals; Radio frequency; Shape;
Conference_Titel :
Engineering in Medicine and Biology Society, 1997. Proceedings of the 19th Annual International Conference of the IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-4262-3
DOI :
10.1109/IEMBS.1997.756853
