Figure 8.

Reconstruction results for data acquired in fully and undersampled mode. (A) shows a fully sampled scan as a reference for a T₂‐weighted TSE scan in the brain, whereas (B) depicts the reconstruction results for a prospectively undersampled scan with an acceleration factor of two (R = 2). The reconstruction matrix has dimensions 256 × 256 and regularization parameters were chosen as $\mu =1,\lambda =4$, and γ = 1. The convergence results for the PCG part with and without preconditioner are plotted in (C). Results for the FLAIR brain scan are shown in (D)‐(F) for a reconstruction matrix size 240 × 224 and R = 2. Regularization parameters were chosen as $\mu =1.4·{10}^2,\lambda =5.7·{10}^2$, and $\gamma =1.4·{10}^2$. Results for a 3D magnetization prepared T₁‐weighted TFE scan in the brain are shown in (G)‐(I) for a reconstruction matrix size 240 × 224 and R = 3. Regularization parameters were chosen as $\mu =0.5,\lambda =2$, and $\gamma =0.5$. Note that the data in the left column stem from a different measurement as the data in the middle column