BOLD Signal Dependence with Field

R2*

R2*

?R2*

?R2*

Gati et al., MRM, 38:296-302 (1997)

1

2

3

4

5

10

20

30

40

50

0.02

0.04

0.1

0.12

0.14

0.5T

1.5T

4T

0.5T

1.5T

4T

0.5T

1.5T

4T

+ further linear increase for SNR

vessels

tissue

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