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. 2022 Jan;63(1):36–43. doi: 10.2967/jnumed.120.261594

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FIGURE 2. — ¹¹C-glutamine tumor uptake in patient with metastatic colorectal cancer. (A–C) Axial ¹¹C-glutamine PET/CT images corresponding to left lung metastasis (A), 2 right lung metastases (B), and brain metastasis (C). Arrowheads point to lesions. Lesion-to-blood pool ratios from whole-body scan were 2.64 (A), 2.22 (B, top arrow), 2.35 (B, bottom arrow), and 1.68 (C). (D) Contrast-enhanced MRI 6.5 wk after baseline PET imaging and treatment. Lesion is indicated with arrowhead. MRI confirms presence of brain lesion seen with ¹¹C-glutamine PET.