We compared quantitatively three commonly used HARDI schemes for describing the myocardium structure in a unified frame-work. One pig heart was firstly scanned with 256 diffusion directions, and then the diffusion ODFs of q-ball imaging (QBI), diffusion spectrum imaging (DSI) and generalized q-space imaging (GQI) were reconstructed respectively, from which the myocardiac fiber orientations and the diffusion metrics were finally extracted and compared. The results show that the cardiac fiber crossing locations, crossing numbers, and the generalized fractional anisotropy detected by three schemes are totally different.
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