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. 2017 May;58(5):799–806. doi: 10.2967/jnumed.116.180992

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© 2017 by the Society of Nuclear Medicine and Molecular Imaging.

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FIGURE 3. — (A) ¹¹C-HED PET tracer uptake quantified using the RI, defined as tracer concentration in tissue at 30–40 min after injection divided by integral of blood input function from 0 to 40 min. Graph demonstrates overall significant increase in RI at location of supraclavicular BAT (BAT), but not at subcutaneous WAT (WAT) and visceral WAT (viscWAT). (B) Variable increase in RI after cold exposure determined at location of supraclavicular BAT (BAT). (C) In contrast, RI in subcutaneous WAT (WAT) shows consistent decrease after cold exposure.