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TABLE 2: Average CBF values with and without VPE
Subject No. Whole Section Gray Matter White Matter
Without VPE With VPE Without VPE With VPE Without VPE With VPE
PET CT PET CT PET CT PET CT PET CT PET CT
1 45.91 52.44^* 46.20 40.70^* 49.34 58.81^* 50.02 47.69^* 35.17 32.44 35.08 25.46^*
2 46.73 61.30^* 46.90 46.91 50.53 73.98^* 51.05 55.65^* 40.49 40.47 40.50 33.44^*
3 49.20 59.85^* 49.43 47.67 54.61 70.08^* 55.03 57.60 39.53 41.59 38.76 28.72^*
4 44.20 60.71^* 44.57 46.36^* 48.43 64.54^* 48.75 53.81^* 38.31 55.36^* 37.64 33.97^*
5 48.26 60.76^* 48.73 47.80^* 51.54 66.22^* 52.02 50.73 37.50 42.80 37.32 30.34^*
Average 46.86 59.01 47.17 45.56 50.89 66.73 51.37 52.75 38.20 42.53 37.86 30.38
* Indicates a statistically significant difference (P < .01).

Subject No.	Whole Section				Gray Matter				White Matter
	Without VPE		With VPE		Without VPE		With VPE		Without VPE		With VPE
	PET	CT	PET	CT	PET	CT	PET	CT	PET	CT	PET	CT
1	45.91	52.44^*	46.20	40.70^*	49.34	58.81^*	50.02	47.69^*	35.17	32.44	35.08	25.46^*
2	46.73	61.30^*	46.90	46.91	50.53	73.98^*	51.05	55.65^*	40.49	40.47	40.50	33.44^*
3	49.20	59.85^*	49.43	47.67	54.61	70.08^*	55.03	57.60	39.53	41.59	38.76	28.72^*
4	44.20	60.71^*	44.57	46.36^*	48.43	64.54^*	48.75	53.81^*	38.31	55.36^*	37.64	33.97^*
5	48.26	60.76^*	48.73	47.80^*	51.54	66.22^*	52.02	50.73	37.50	42.80	37.32	30.34^*
Average	46.86	59.01	47.17	45.56	50.89	66.73	51.37	52.75	38.20	42.53	37.86	30.38