What kind of resolution are you looking to do and for what purpose? Peace,
Matt. From: <hcp-users-boun...@humanconnectome.org<mailto:hcp-users-boun...@humanconnectome.org>> on behalf of Sebastien Hetu <sebh...@vtc.vt.edu<mailto:sebh...@vtc.vt.edu>> Date: Wednesday, July 19, 2017 at 3:28 PM To: "Harms, Michael" <mha...@wustl.edu<mailto:mha...@wustl.edu>>, "hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org>" <hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org>> Subject: Re: [HCP-Users] signal to noise ratio Hi Michael, for now preprocessing and SNR analysis are pretty basic, similar to what was done in Preibisch et al. 2015 (Evaluation of MB EPI Acquisitions for RS fMRI, PLOS ONE). Preprocessing only includes motion correction and SNR=mean of signal/SD of signal across the time course. We would like to try using the sequences with a higher spatial resolution and thus wanted to see the possible drop in SNR if we did this. As a first step, we wanted to get an idea of the SNR at the base resolution but the SNR (using this crude preprocessing) seems to be pretty low even at base spatial resolution. Hence, I wanted to know what kind of SNR we could get using the best case scenario (e.g., HCP-like preprocessing). Thanks seb ________________________________ From: Harms, Michael [mha...@wustl.edu<mailto:mha...@wustl.edu>] Sent: Wednesday, July 19, 2017 4:04 PM To: Sebastien Hetu; hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org> Subject: Re: signal to noise ratio Sure, we have data, but I'm not sure how useful it would be to you without getting into various details. e.g., What type of preprocessing are you intending? Does it include any denoising? How are you going to define your spatial mask? Etc... How exactly were you thinking of quantifying the temporal SNR? cheers, -MH ________________________________ From: hcp-users-boun...@humanconnectome.org<mailto:hcp-users-boun...@humanconnectome.org> <hcp-users-boun...@humanconnectome.org<mailto:hcp-users-boun...@humanconnectome.org>> on behalf of Sebastien Hetu <sebh...@vtc.vt.edu<mailto:sebh...@vtc.vt.edu>> Sent: Wednesday, July 19, 2017 2:54:09 PM To: hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org> Subject: [HCP-Users] signal to noise ratio Hi, We are trying to use the HCP lifespan rfMRI sequences on our PRISMA. Is there any data on the temporal SNR that can be expected (for single subject) using these rfMRI sequences that we could use to compare to our own acquisitions. Best regards Seb Sébastien Hétu Ph.D. Postdoctoral Fellow Human Neuroimaging Laboratory Virginia Tech Carilion Research Institute Virginia, USA _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org<mailto:HCP-Users@humanconnectome.org> http://lists.humanconnectome.org/mailman/listinfo/hcp-users ________________________________ The materials in this message are private and may contain Protected Healthcare Information or other information of a sensitive nature. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately notify the sender via telephone or return mail. _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org<mailto:HCP-Users@humanconnectome.org> http://lists.humanconnectome.org/mailman/listinfo/hcp-users _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
