Fig. 1

Density-weighted three-fold under-sampling of the acquired k-space data was used. The data acquisition mask used to acquire the data is shown (A). The resulting point-spread function (PSF) is shown after zerofilling to a matrix size of 64 × 64 and FOV of 24 × 24 mm² (B) along with the corresponding profile through the centre of the three-fold under-sampled (R = 3) PSF (C). Quantitative analysis of the PSF at 64% maximum peak height yielded a nominal spatial resolution of ~ 1.3 mm. The corresponding PSF resulting from an equivalent uniformly sampled acquisition (R = 1) is shown for comparison