FIGURE 4. Coronal, transverse, and sagittal images obtained using H₂¹⁵O (perfusion, left column), FDG (middle column), and TYR (right column) in patient with large, low-grade astrocytoma in left temporoparietal region show that tumor is not intensely perfused and glucose metabolism is low. However, large area of irregularly increased amino acid uptake is clearly seen, and amino acid uptake is noted in lacrimal gland.

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