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Unfortunately that is something that anyone using gradient echo EPI has to deal with. Because of inhomogeneity in the magnetic field, some areas spins decay faster than other areas resulting in loss of signal. This is not a correctable artifact unfortunately.
Peace,
Matt.
From: Xuhong Liao <[email protected]>
Date: Sunday, November 23, 2014 at 4:24 AM To: hcp-users <[email protected]> Cc: Matt Glasser <[email protected]> Subject: Re: Re: About data processing Hi Matt,
Thank you very much for your response.
As your post, several slices of rsfMRI data (left-right encoded, second session) are displayed for one subject (ID: 100307) as examples. Please see attached for more details. We can observe there the BOLD signals are missing in certain brain regions,
such as superior orbital frontal cortex and bilateral inferior temporal gyrus. I hope above statement is clear, if not please contact with me.
Thanks again!
Best regards,
Xuhong Liao
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