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. 2023 Jan 26;11(2):364. doi: 10.3390/biomedicines11020364

Table 4.

Standard metabolic ratios [98,104,107].

  NORMAL ABNORMAL (Neoplasm)
NAA/Cr 2.0 <1.6
NAA/Cho 1.6 <1.2
Cho/Cr 1.2 >1.5
Cho/NAA 0.7 >1.0