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
> >
>
>

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