Table 2

Mean standardized uptake value (SUV), maximal SUV, and tumor:nontumor ratio (TNT) in the French or Japanese grading system

French grading systemaJapanese grading systemb
Grade 1c (n = 6)Grade 2c (n = 6)Grade 3c (n = 8)Low gradedvs. high gradeGrade 1c (n = 7)Grade 2c (n = 5)Grade 3c (n = 8)Low gradedvs. high grade
Mean SUV0.9 (0.2–1.5)2.8 (0.8–3.7)2.8 (2.2–4.9)0.0011.0 (0.2–3.5)2.1 (0.8–3.7)2.8 (2.2–4.9)0.011
Maximal SUV1.2 (0.3–1.7)3.4 (1.0–5.2)3.3 (2.8–6.7)0.0011.3 (0.3–5.2)2.8 (1.0–4.7)3.3 (2.8–6.7)0.014
TNT1.9 (0.6–2.4)4.4 (2.1–6.4)6.0 (2.5–9.3)0.0012.1 (0.6–6.4)3.4 (2.1–5.9)6.0 (2.5–9.3)0.008
  • a Ref. 5 .

  • b Ref. 6 and 7 .

  • c Values expressed as medians (range).

  • d Statistical difference between medians (Ps). Low grade, grade 1; high grade, grade 2 + 3.