Simultaneous Acquisition of Metabolite and Water Signals in 3D Echo Planar Spectroscopic Imaging

Toru Shirai¹, Satoshi Hirata¹, Yoshitaka Bito¹

We have developed a technique for simultaneously acquiring of metabolite and water signals in 3D echo planar spectroscopic imaging (EPSI). The pulse sequence of this technique includes three CHESS pulses the amplitude of which is switched alternately in accordance with slice encoding steps to reverse the polarity of the water signal. The metabolite signal is separable from the water signal, because the water signal is shifted to the top and bottom of the reconstructed 3D image. The results of phantom experiments showed that this technique effectively corrected the eddy current influence, suggesting the usefulness of the proposed method.