Nuclear imaging to characterize adrenal tumors: Comparison with MRI

Figure 3 Right adrenal metastasis by melanoma. A: Axial fluorine-18 fludeoxyglucose-positron emission tomography scan detects abnormal focal uptake in the right adrenal region (black arrow) where a large adrenal metastasis was detected by magnetic resonance (MR); diffuse normal liver tracer activity is detectable; physiologic tracer activity is also detectable in kidneys; B: T1-weighted axial MR detects a right adrenal tumor hypointense compared to liver signal intensity (white arrow).