Method for determining optimized radio-frequency pulse shapes for selective excitation in magnetic resonance spectroscopy and imaging

摘要

In magnetic resonance spectroscopy and imaging, it is usually necessary to obtain spectra only from desired, localized regions of an examination subject. This is accomplished by subjecting the examination subject to a selective radio-frequency (RF) pulse. A method for optimizing the pulse shape of such a radio-frequency pulse includes the steps of exciting a spin system with a frequency-selective radio- frequency pulse, reading out the resulting echo signal, cutting off high- frequency signal components of the echo signal using a filter, and employing the filtered echo signal as the optimized radio-frequency pulse shape.