Table 3.

rCBF measurements from PET and CT scanning

Patient	Tumour			Grey matter		White matter		Tumour normalized		Grey matter normalized
	PET	CT	r 2	PET	CT	PET	CT	PET	CT	PET	CT
1	27.8 ± 16.1	43.4 ± 32.8*	0.91**	32.9	70.9	16.5	34.1	1.7 ± 1.0	1.3 ± 1.0*	2.0	2.1
2	29.2 ±  5.2	71.0 ±  9.9*	0.06	49.7	64.7	20.7	24.5	1.4 ±  0.3	2.9 ±  0.4*	2.4	2.6
3	12.1 ± 1.3	14.7 ± 4.8	0.08	45.9	58.5	21.8	26.4	0.6 ± 0.1	0.6 ± 0.2	2.1	2.2
4	15.4 ± 1.7	40.5 ± 10.1*	0.05	27.9	81.5	12.2	29.5	1.3 ± 0.1	1.4 ± 0.3	2.3	2.8
5	12.4 ±  4.8	96.2 ±  22.0*	0.14	20.9	81.7	11.3	36.6	1.1 ±  0.4	2.6 ±  0.6*	1.8	2.2
6	45.9 ± 20.1	142.2 ± 53.8*	0.55**	35.1	62.7	20.7	29.9	2.2 ± 1.0	4.8 ± 1.8*	1.7	2.1
7	27.5 ±  12.3	82.6 ±  18.4*	0.02	32.5	77.9	11.7	26.9	2.3 ±  1.1	3.1 ±  0.7	2.8	2.9
8	17.1 ±  2.8	61.4 ±  19.8*	0.03	32.8	101.2	11.4	32.0	1.5 ±  0.2	1.9 ±  0.6	2.9	3.2
9	73.2 ± 19.3	141.0 ± 32.2*	0.08	42.7	60.2	21.6	25.7	3.4 ± 0.9	5.5 ± 1.3*	2.0	2.3
10	20.9 ±  6.8	96.3 ±  36.8*	0.31**	28.9	86.7	11.4	31.4	1.8 ±  0.6	3.1 ±  1.2*	2.5	2.8
Mean ± SD	28.2 ± 18.8	78.9 ± 41.8***	0.22	34.9 ± 8.8	74.6 ± 13.7***	15.9 ± 4.8	29.7 ± 3.9***	1.7 ± 0.8	2.7 ± 1.5***	2.2 ± 0.4	2.5 ± 0.4***

Tumour, grey matter and white matter ROIs, and tumour ROIs and grey matter ROIs normalized with white matter, listed as mean ± SD. Volume-weighted rCBF is given in ml min⁻¹ 100 ml⁻¹. High-grade tumours are marked in bold

*Significant difference between modalities in the individual patient, p <0.05

**Significant correlation between modalities in the individual patient, p <0.05

***Significant difference between modalities in all patients, p <0.05