Improved Activation and Hemodynamic Response Function of Olfactory fMRI Using Simultaneous Multislice with Reduced TR Acquisition

Table 1

The metrics of functional activation and HRF curve in the three olfactory brain regions.

ROIs	TRs
	500 ms	1000 ms	3000 ms
Amygdalae
Activation voxels	^aa	^bb	^aa,bb	<0.001
Mean t-score	^aa	^bb	^aa,bb	<0.001
Maximum t-score	^aa	^bb	^aa,bb	<0.001
Response height	^aa,c	^c	^aa	<0.001
Time to peak				<0.001
Hippocampus
Activation voxels				0.422
Mean t-score				0.077
Maximum t-score				0.082
				0.001
Time to peak				<0.001
Insulae
Activation voxels				<0.001
Mean t-score				<0.001
Maximum t-score				<0.001
Response height				0.014
Time to peak				0.001

All metrics are expressed as the . A repeated measures ANOVA is used to estimate the effect of TR. ^aStatistically significant differences between TRs of 500 ms and 3000 ms; . ^bStatistically significant differences between TRs of 1000 ms and 3000 ms; . ^cStatistically significant differences between TRs of 500 ms and 1000 ms; .