Table 2.

A: Overview of frequency of grade of disease-affection of the respective territories for each modality. B: Over- and underestimation of the respective modalities shown by diverse ratings of individual territories of each modality. The table shows the number of territories with differing estimation of the respective grade (1–4) of the cerebrovascular reserve/reactivity between both modalities. No specific patterns of over- and/or underestimation in each of both modalities could be seen.

A
Grade of affection	fMRI	PET
1	91	89
2	25	27
3	23	24
4	21	20
B
Over- and underestimation	fMRI	PET	Number of territories
(grade found in respective imaging modality)	1	2	8
	2	1	6
	2	3	3
	3	2	3
	3	4	2
	4	3	3
Total			25