Figure 8

Iteratively updated$T_2^{\ast }$ weighted magnitude and magnetic flux densityB _z images using${\mathcal{P}}^0\cup {\mathcal{P}}^{+}$ withN _c =5 andN _c =10.a) and e) recovered$T_2^{\ast }$ weighted magnitude image at each echo time$T_{E_m},m=1,2,3,4$, with N _c =5 and N _c =10, respectively. b) and f) combined$T_2^{\ast }$ weighted magnitude image using the recovered magnitude image at each echo time with N _c =5 and N _c =10, respectively. c) and g) recovered B _z image at each echo time$T_{E_m},m=1,2,3,4$,with N _c =5 and N _c =10, respectively. d) and h) weighted B _z image using multiple B _z image at each echo time with N _c =5 and N _c =10, respectively.