Generally not.  A bigger issue is not using fat suppression.

Peace,

Matt.

From: Jamila Ahdidan <jam...@brainreader.net<mailto:jam...@brainreader.net>>
Date: Tuesday, March 6, 2018 at 3:31 AM
To: Matt Glasser <glass...@wustl.edu<mailto:glass...@wustl.edu>>
Cc: "Xu, Junqian" <junqian...@mssm.edu<mailto:junqian...@mssm.edu>>, HCP Users 
<hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org>>
Subject: Re: [HCP-Users] contrast in human connectome 3T structural MRI

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<tel:+45%2050%2050%2055%2044>
email: jam...@brainreader.net<mailto:jam...@brainreader.net>
skype: jamila_ahdidan
website: www.brainreader.net<http://www.brainreader.net/>

On Mon, Mar 5, 2018 at 7:46 PM, Glasser, Matthew 
<glass...@wustl.edu<mailto: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<mailto: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<mailto: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<mailto:hcp-users-boun...@humanconnectome.org>>
>>  on behalf of Jamila
>>Ahdidan <jam...@brainreader.net<mailto:jam...@brainreader.net>>
>> Date: Monday, March 5, 2018 at 2:53 AM
>> To: "hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org>" 
>> <hcp-users@humanconnectome.org<mailto: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<tel:%2B45%205050%205544>
>> email: jam...@brainreader.net<mailto:jam...@brainreader.net>
>> skype: jamila_ahdidan
>> website: www.brainreader.net<http://www.brainreader.net>
>> _______________________________________________
>> 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<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

Reply via email to