Diffusion MRI using two-dimensional single-shot radial imaging (2D ss-rDWI) with variable flip angle and random view ordering

In-vivo human brain DW images of sagittal plane: (a) anatomical image, (b–d) 2D ss-DWEPI, and (e–g) 2D ss-rDWI with b = (b, e) 0, (c, f) 500 s/mm2 and (d, g) corresponding ADC maps. The pituitary gland (indicated by red arrow) is visible in 2D ss-rDWI. However, it is not possible to identify pituitary gland on images obtained using 2D ss-DWEPI because of severe susceptibility-induced geometric distortion. ROIs to estimate the SNR are shown in (c) and (f).Unlabelled Image