Fast proton spectroscopic imaging using the sliced k‐space method

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Abstract
The use of one‐shot imaging methods for proton spectroscolpic imaging (1H‐SI) is examined. In particular the acquisition of Kx × Ky × Nt data points by means of Nt excitations, each acquiring a Kx, × Ky, k‐space slice, is advocated. A number of strategies for realising this experiment, and combining it with water suppression and volume‐selection are proposed. The practical implementation at 4.7 T for 1H‐Sl of the rat brain is described. Experimental results from a 32 × 32 spatial matrix with Nt = 64 are presented. Spectra obtained from volumes as low as 3.5 μl and within measuring times of as little as 3.8 min are shown. In these choline, creatine/phosphocreatine and N‐acetylaspartate are all clearly visible.

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