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T2-weighted image of tumor-bearing mouse injected with pluronic F127-modifed magnetic NPs. Enhanced contrast in the tumor (denoted by arrow) is apparent 4 min after the initial injection and is more pronounced at 68 min after a second injection of the MNPs. Images were analyzed for signal intensity in the tumor with Amira software (Visage Imaging, Inc., San Diego, CA). Reproduced with permission.[208] Copyright 2009 Elsevier.
