TO THE EDITOR: Food and Drug Administration (FDA) approval of O -(2-[18F]fluoroethyl)-L-tyrosine ([18F]FET) (Pixclara; Telix Pharmaceuticals) was an important step for amino acid PET. However, the prescribing information uses the maximal target-to-background ratio (TBRmax) for a measurement
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Chaban et al. (2026) studied this question.
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