Fast Compressed Sensing MRI Based on Complex Double-Density Dual-Tree Discrete Wavelet Transform

Figure 6

The comparison results among three different MR reconstruction algorithms using Gaussian random mask (a and b) and radial mask (c and d) at a 20% sampling ratio using Shepp-Logan phantom image. (a) and (c) PSNR versus iterations; (b) and (d) Rel.Err versus iterations.

(a)

(b)

(c)

(d)