EJNMMI Research

Table 3 Mean plasma concentration of each NAA

From: Optimization of [¹¹C]methionine PET study: appropriate scan timing and effect of plasma amino acid concentrations on the SUV

NAA	Eleven subjects (nmol/ml)	Normal range (nmol/ml) (95% CI)
Methionine	26.5 ± 7.4	18.9 to 40.5
Phenylalanine	54.7 ± 8.4	42.6 to 75.7
Tryptophan	44.2 ± 9.0	37.0 to 74.9
Isoleucine	68.6 ± 21.1	43.0 to 112.8
Leucine	118.9 ± 33.3	76.6 to 171.3
Valine	223.2 ± 40.2	147.8 to 307.0
Threonine	131.5 ± 33.6	66.5 to 188.9
Tyrosine	60.2 ± 7.1	40.4 to 90.3
Histidine	78.9 ± 7.9	59.0 to 92.0

Values are means ± SD. CI, confidence interval.

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