Table 1.

VASO signal changes measured with EPI and HASTE at different TR

TR (s)	TI (ms)	ΔSEPI (a.u.)	ΔSHASTE (a.u.)
2*	713	5.60±1.06	6.27±1.50
5**	1054	5.20±1.26	4.66±0.89
8***	1116	4.12±1.08	3.67±0.33

Within measurement errors (SD over subjects) CBV signals equally change with TR for both methods. This suggests that both are equally affected by CBF increases upon activation.

Activation was thresholded at *P < 0.0004, **P < 0.0017 and ***P < 0.01 to account for the reduced number of measurements available with increasing TR and to keep activation volume approximately equal for each case. All significantly activated voxels were taken into account for the calculation of signal change