Thanks a lot for the input. Have you ever noticed whether this technique has a negative influence on the segmentation quality performed on those images?
Best regards / Cordialement / De bedste hilsner Jamila Ahdidan PhD, Partner, CSO Brainreader ApS Emil Møllers Gade 41 8700 Horsens - DK tel: +45 5050 5544 <+45%2050%2050%2055%2044> email: jam...@brainreader.net skype: jamila_ahdidan website: www.brainreader.net On Mon, Mar 5, 2018 at 7:46 PM, Glasser, Matthew <glass...@wustl.edu> wrote: > Indeed this contrast mechanism is used to make MR angiograms of the head > without using contrast. > > Peace, > > Matt. > > On 3/5/18, 12:44 PM, "Xu, Junqian" <junqian...@mssm.edu> wrote: > > >Hi Jamila, > > > >These variable bright arteries in the T1w MPRAGE images are probably due > >to the time-of-flight (TOF) effects of those ³fresh" arterial blood > >flowing into the brain after the inverse pulse. > > > >http://mriquestions.com/time-of-flight-effects.html > > > >Regards > >Gordon > > > >> On Mar 5, 2018, at 9:15 AM, Glasser, Matthew <glass...@wustl.edu> > wrote: > >> > >> No gadolinium contrast was used in the HCP. Sometimes blood will > >>appear bright on T1w scans for reasons other than gadolinium contrast. > >> > >> Peace, > >> > >> Matt. > >> > >> From: <hcp-users-boun...@humanconnectome.org> on behalf of Jamila > >>Ahdidan <jam...@brainreader.net> > >> Date: Monday, March 5, 2018 at 2:53 AM > >> To: "hcp-users@humanconnectome.org" <hcp-users@humanconnectome.org> > >> Subject: [HCP-Users] contrast in human connectome 3T structural MRI > >> > >> Hi, > >> > >> I have noticed that many if not all the structural MRIs of the HCP show > >>signs of contrast in the subjects blood. Is that correct? Have you > >>scanned the participants without using contrast as this disturbs the > >>segmentation? > >> > >> Thank you. > >> > >> Best regards / Cordialement / De bedste hilsner > >> > >> Jamila Ahdidan > >> PhD, Partner, CSO > >> Brainreader ApS > >> Emil Møllers Gade 41 > >> 8700 Horsens - DK > >> tel: +45 5050 5544 > >> email: jam...@brainreader.net > >> skype: jamila_ahdidan > >> website: www.brainreader.net > >> _______________________________________________ > >> HCP-Users mailing list > >> 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 > > > > _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
