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The 3D and transverse views of SPECT/CT image of an athymic nude mouse bearing U87M human glioma xenografts (~0.2 cm3). The animal was administered with ~50 MBq of 4. There was no significant radioactivity accumulation in kidneys, liver, lungs, and muscle. However, there was significant radioactivity accumulation in the intestines, which is consistent with the biodistribution data (Table 2).
