Table 3.

Showing metabolite ratios for both the tumours and healthy tissue of three paediatric patients with optic pathway gliomas. The normal data for each patient represent the mean of voxels with normal appearing brain on conventional MRI included in the MRSI grid. The ± value is the standard deviation.

Metabolites	Patient 1		Patient 2		Patient 3
	Normal	Tumour	Normal	Tumour	Normal	Tumour
PC/GPC	0.60 ± 0.18	0.41	0.48 ± 0.17	0.34	0.49 ± 0.12	0.57
GPE/ATP	0.31 ± 0.05	0.22	0.25 ± 0.04	0.31	0.23 ± 0.00	0.14
PC/ATP	0.25 ± 0.05	0.19	0.21 ± 0.07	0.20	0.17 ± 0.05	0.21
GPC/ATP	0.45 ± 0.15	0.47	0.45 ± 0.04	0.59	0.35 ± 0.04	0.38
PI/ATP	0.23 ± 0.08	0.24	0.30 ± 0.07	0.31	0.25 ± 0.02	0.18
PCr/ATP	1.20 ± 0.04	0.82	1.00 ± 0.07	1.21	1.06 ± 0.07	0.71
NADH/ATP	0.38 ± 0.04	0.42	0.33 ± 0.02	0.35	0.34 ± 0.05	0.26
PE/GPE	2.04 ± 0.54	2.52	2.59 ± 0.37	2.14	2.64 ± 0.17	4.50
PC/PE	0.40 ± 0.04	0.36	0.34 ± 0.11	0.30	0.28 ± 0.07	0.33
PE/PCr	0.52 ± 0.04	0.66	0.63 ± 0.04	0.55	0.56 ± 0.03	0.91