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(a) Biopsy artifact (signal hyperintensity indicated by red arrow) on the MRCAT source mDixon water MR image. (b) Hemorrhage/blood/calcification artifacts on T2w, mDixon water and 3D bFFE. The artifact appears as a dark signal on mDixon water image. One possible explanation for areas with low signal on T1 and T2 is the presence hemosiderin.
