Abstract
A new sequence of hard pulses for selective excitation in the rotating frame is proposed. A desired excitation spectrum M xy ( v 1) can be obtained if the lengths of the pulses are modulated. The relationship between the shape of the modulation and the excitation spectrum is derived using the rotation-operator formalism. This approach is also applied to the DANTE sequence and similarities and differences between these two sequences are discussed. An application of the proposed sequence to obtaining a depth discrimination with surface coils was investigated and experiments on phantoms were performed. Preliminary in vivo selective spectra were also obtained.
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