Differential Diagnosis between Low-Grade and High-Grade Astrocytoma Using System A Amino Acid Transport PET Imaging with C-11-MeAIB: A Comparison Study with C-11-Methionine PET Imaging

Table 2

SUVmax and T/N ratios of MeAIB- and MET-PET study in patients with brain tumors.

Group A (benign group)
Diagnosis		MeAIB		MET
		SUVmax	T/N ratio	SUVmax	T/N ratio
1	Low-grade glioma	0.58	3.22	1.98	1.78
2	Astrocytoma grade II	2.83	8.09	2.83	1.35
3	Low-grade glioma	0.24	1.64	1.80	1.04
4	Glioma grade II	0.15	1.25	3.03	2.37
5	Low-grade glioma	0.62	1.11	3.13	1.82
6	Low-grade glioma	0.85	2.07	3.89	2.54
7	Brain stem glioma	3.40	4.86	3.03	1.89
8	Glioma grade II, rec.	3.49	6.13	1.96	2.68
9	Low-grade glioma	0.32	4.00	4.82	4.38
10	Low-grade glioma	0.4	6.67	2.19	3.22
11	Low-grade glioma	1.34	4.96	4.08	6.07
12	Low-grade glioma	0.12	1.20	3.41	2.54
Ave.		1.20	3.77	3.01	2.64
Group B (malignant group)
13	GBM	4.81	32.07	5.82	4.44
14	GBM, rec.	2.95	14.89	3.49	3.45
15	GBM, rec.	2.94	26.72	3.63	3.67
16	GBM, rec.	2.33	8.96	5.39	2.51
17	GBM, rec.	2.84	12.91	5.54	2.55
18	GBM, rec.	2.83	15.00	4.27	3.30
19	GBM	1.60	4.00	3.10	1.24
20	GBM	2.89	22.23	6.47	3.87
21	GBM, rec.	4.51	25.10	6.14	3.23
22	GBM, rec.	2.89	17.00	3.40	2.91
23	GBM	2.81	17.56	6.07	6.07
24	GBM	5.85	15.81	4.57	3.41
25	GBM, rec.	1.22	17.43	1.46	1.76
26	GBM, rec.	4.58	21.73	5.90	2.71
27	GBM, rec.	2.83	15.00	4.27	3.30
28	GBM	2.89	22.23	7.82	4.68
29	Anaplastic astrocytoma	1.95	10.26	5.94	4.01
30	Anaplastic astrocytoma	1.73	7.86	2.18	1.79
31	GBM	1.43	13.00	4.27	2.12
Ave.		2.94	16.83	4.72	3.21