Great, thank you for the clarification. Best, Ben
On Wed, May 11, 2016 at 9:08 AM, Harms, Michael <[email protected]> wrote: > > Hi Ben, > The following replies to your questions are from Steen Moeller (cc’ed) at > CMRR. > > 1/ the reconstruction for all HCP data is performed using the slice-grappa > algorithm. There was a change in Q3 that improved on the implementation of > it relative to some low-level sequence detail concerning the use of the > blipping scheme in blipped-CAIPI reference data. The choosen algorithm > however has stayed the same. The SpSg algorithm has not been used, but is > available in new versions of the sequence. > > 2/ the individual coil data are not available. If this is only needed for > a single session, that can then be made available for a representative > dataset. If so then email me directly to make this available. > > cheers, > -- > Michael Harms, Ph.D. > ----------------------------------------------------------- > Conte Center for the Neuroscience of Mental Disorders > Washington University School of Medicine > Department of Psychiatry, Box 8134 > 660 South Euclid Ave. Tel: 314-747-6173 > St. Louis, MO 63110 Email: [email protected] > > From: <[email protected]> on behalf of Benjamin Risk < > [email protected]> > Date: Monday, May 9, 2016 at 10:41 PM > To: "Glasser, Matthew" <[email protected]> > Cc: "[email protected]" <[email protected]> > Subject: Re: [HCP-Users] Clarification in change in fMRI reconstruction > algorithm > > They didn't use in-plane GRAPPA but they used a multi-band variant on > GRAPPA. Setsompop 2012 is called Slice-GRAPPA. I am asking about the > details of the multiband reconstruction. > > Thanks, > Ben > > On Mon, May 9, 2016 at 10:51 PM, Glasser, Matthew <[email protected]> > wrote: > >> fMRI didn’t use GRAPPA, rather it was an update to the multi-band >> reconstruction. >> >> Peace, >> >> Matt. >> >> From: <[email protected]> on behalf of Benjamin Risk >> <[email protected]> >> Date: Monday, May 9, 2016 at 12:55 PM >> To: "[email protected]" <[email protected]> >> Subject: [HCP-Users] Clarification in change in fMRI reconstruction >> algorithm >> >> Dear HCP experts, >> >> I have two questions: >> >> 1) I understand that the reconstruction algorithm for fMRI changed with >> the Q3 data release. I believe there are three main GRAPPA reconstruction >> approaches for multiband imaging: SENSE/GRAPPA from Blaimer et al (2006); >> Slice-GRAPPA from Setsompop et al (2012); and Split-Slice-GRAPPA from >> Cauley et al (2014). Do the HCP reconstruction algorithms correspond to >> these methods? From my reading of Ugurbil et al 2013, p. 89, I thought the >> change was from SENSE/GRAPPA to Slice-GRAPPA, but I now see that the >> overview document >> http://www.cmrr.umn.edu/multiband/Multi-Band_C2P_Instructions_R013a.pdf >> includes a citation to Cauley. >> >> 2) I ultimately want to simulate data generated by coil sensitivities >> similar to the HCP scanners and head coils. Are single-band calibration >> data for each coil available? >> >> >> Thank you, >> Ben Risk >> Postdoc at SAMSI / Department of Biostatistics UNC Chapel Hill >> >> _______________________________________________ >> HCP-Users mailing list >> [email protected] >> 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 > [email protected] > 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 [email protected] http://lists.humanconnectome.org/mailman/listinfo/hcp-users
