Table 2.
Positron emission tomography parameters for primary tumour (T−), lymph node (LN) (N−) and the farthest LN [N(f)−]
| Parameter | Median (range) | Parameter | Median (range) |
|---|---|---|---|
| T–SUVmax | 8.2 (2.2–25.8) | ln (T−MTV30) | 2.6 (0.6–4.8) |
| T−SUVmean | 3.3 (1.1–11.9) | ln (T−MTV40) | 2.2 (−0.2–4.6) |
| T−SUVpeak | 6.7 (1.6–19.6) | ln (T−MTV50) | 1.7 (−0.6–4.5) |
| N−SUVmax | 8.0 (1.6–21.7) | ln (T−MTV60) | 1.2 (−1.6–4.1) |
| N−SUVpeak | 5.8 (1.2–18.4) | ln (T−MTV70) | 0.7 (−2.7–3.2) |
| N(f)−SUVmax | 6.3 (1.6–20.1) | ln (T−TLG30) | 4.0 (1.8–6.6) |
| N(f)−SUVpeak | 4.7 (1.2–14.4) | ln (T−TLG40) | 3.8 (1.3–6.5) |
| ln (T−TLG50) | 3.4 (1.0–6.4) | ||
| ln (T−TLG60) | 3.1 (0.2–6.1) | ||
| ln (T−TLG70) | 2.6 (−0.1–5.3) |
ln, natural log; MTV, metabolic tumour volume; MTV30–MTV70, tumour volume with 30%, 40%, 50%, 60% and 70% of the maximum standardized uptake value as the threshold; SUVmax, maximum standardized uptake value; SUVmean, mean standardized uptake value; SUVpeak, peak standardized uptake value; TLG, total lesion glycolysis; TLG30–TLG70, product of each MTV and the corresponding mean standardized uptake value within that MTV.