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(a) and (b), the simulated results about the SNR and PSF as a function of half-echo projections number, respectively. (c) and (d), the calculated signal intensity (arbitrary unit of the same scale) as functions of the half-echo projections number and the undersampling factor, respectively with (c) projections number 1000, undersampling factor 50 and (d) projections number 50000, undersampling factor 1, respectively, biexponential decay, resolution: 128 × 128.
