Table 5. Lesion-to-normal tissue ratio.

Subject	Reference to lesion	L/N max	L/N mean	L/N max mean
Recurrence (Glioma and metastasis)	Around	1.7 ± 0.6 (1.0–3.9)	1.8 ± 0.8 (0.6–4.4)	2.2 ± 1.0 (1.0–5.0)
	Contralateral	1.8 ± 0.7 (0.6–5.6)	1.7 ± 0.8 (0.5–6.0)	2.1 ± 0.9 (0.6–6.8)
	Frontal lobe	1.9 ± 0.7 (0.9–5.1)	1.8 ± 0.8 (0.6–5.4)	2.1 ± 0.9 (1.1–6.1)
	Cerebellum	1.5 ± 0.5 (0.7–3.8)	1.4 ± 0.5 (0.5–3.6)	1.7 ± 0.6 (0.8–4.1)
Glioma	Around	1.6 ± 0.7 (1.0–3.9)	1.7 ± 0.8 (0.9–4.4)	2.0 ± 0.9 (1.0–5.0)
	Contralateral	1.8 ± 1.0 (0.6–5.6)	1.9 ± 1.1 (0.5–6.0)	2.1 ± 1.2 (0.6–6.8)
	Frontal lobe	1.8 ± 0.9 (0.9–5.1)	1.8 ± 1.0 (0.8–5.4)	2.0 ± 1.0 (1.1–6.1)
	Cerebellum	1.5 ± 0.7 (0.7–3.8)	1.4 ± 0.7 (0.7–3.6)	1.6 ± 0.7 (0.8–4.1)
Metastasis	Around	1.8 ± 0.5 (1.0–3.0)	1.9± 0.8 (0.6–4.2)	2.5 ± 1.0 (1.2–5.0)
	Contralateral	1.7 ± 0.4 (0.9–2.8)	1.6 ± 0.5 (0.6–3.2)	2.1 ± 0.6 (1.2–3.8)
	Frontal lobe	1.9 ± 0.6 (1.0–3.6)	1.8 ± 0.6 (0.6–3.3)	2.3 ± 0.7 (1.2–4.0)
	Cerebellum	1.5 ± 0.4 (0.8–2.5)	1.4 ± 0.4 (0.5–2.4)	1.7 ± 0.5 (0.9–2.8)
Radiation necrosis	Around	1.3 ± 0.4 (0.6–2.1)	1.3 ± 0.4 (0.6–2.0)	1.8 ± 0.9 (0.7–4.9)
	Contralateral	1.2 ± 0.3 (0.6–2.3)	1.2 ± 0.4 (0.7–2.4)	1.6 ± 0.6 (0.5–3.8)
	Frontal lobe	1.3 ± 0.4 (0.6–2.4)	1.2 ± 0.4 (0.6–2.3)	1.7 ± 0.9 (0.7–5.0)
	Cerebellum	1.0 ± 0.3 (0.5–1.8)	0.9 ± 0.3 (0.4–1.8)	1.3 ± 0.7 (0.5–3.8)

Range is represented in parenthesis. L/N ratio: lesion to normal tissue ratio L/Nmax: SUVmax (lesion) / SUVmax (reference), L/Nmean: SUVmean (lesion)/ SUV mean (reference), L/N max mean: SUVmax (lesion)/ SUV mean (reference).