title: Simultaneous spatial and spectral selective excitation.
abstract: Using a k-space interpretation of small-tip excitation, a single excitation pulse has been designed that is simultaneously selective in space and resonant frequency. An analytic expression for the response of this pulse has been derived. The pulse has been implemented on a 1.5-T imaging system. The pulse has been applied to a rapid gradient-echo imaging sequence that forms both water and fat images within a breath-holding interval. These rapid images are free of the chemical shift artifacts at organ boundaries that typically afflict conventional rapid images. The pulse can be applied to a variety of other sequences, such as multislice water/fat sequences and rapid k-space scanning sequences.
authors.affiliation: Information Systems Laboratory, Stanford University, California 94305.
authors.forename: C H
authors.initials: CH
authors.lastname: Meyer
authors.forename: J M
authors.initials: JM
authors.lastname: Pauly
authors.forename: A
authors.initials: A
authors.lastname: Macovski
authors.forename: D G
authors.initials: DG
authors.lastname: Nishimura
mesh_terms: D000273:Adipose Tissue / Q000033:anatomy & histology; D001834:Body Water / Q000378:metabolism; D003198:Computer Simulation; D005583:Fourier Analysis; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008433:Mathematics; D008954:Models, Biological