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Figure 2 Thoracic positron emission tomographic scans depicting (left) myocardial 13N-ammoniaderived radioactivity, (middle) 6-[18F]-fluorodopaminederived radioactivity, and (right) the ratio of 18F:13N in (top) a normal volunteer and (bottom) a patient with hypertrophic cardiomyopathy, after IV injection of 5 mCi 13N-ammonia and then 1 mCi 6-[18F]-fluorodopamine. Sep = septum; Lat = lateral wall; Ap = apex; LV = left ventricle.
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