Abstract #2998
Respiratory Volume Over Time Effects in Resting-State Gradient-Echo and Spin-Echo EPI BOLD
Yasha Khatamian 1 and J. Jean Chen 1
1
Rotman Research Institute, Toronto, ON,
Canada
This study investigated the effects of respiratory noise
on gradient-echo vs. spin-echo BOLD acquired in the
resting-state. Correlations were calculated between
gradient-/spin-echo scans and the raw respiration volume
over time signal as well as this same signal convolved
with a respiration response function. Spin-echo showed
weaker and less structured correlations to the
respiration volume over time signal, supporting the idea
that the effects of this signal are more prominent in
gradient-echo scans and have a potential macrovascular
origin. The findings presented here further support the
benefits of using spin-echo BOLD as an alternative in
resting-state functional MRI studies.
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