Dear Michael,
Thanks for your quick response!
The exact value for the blood-tissue partition coefficient (¦Ë) was not clear from the homepage, but now I'm fine with that information!
Thanks again, st¨¦phanie
________________________________________
Von: FSL - FMRIB's Software Library [[log in to unmask]]" im Auftrag von "Michael Chappell [[log in to unmask]]
Gesendet: Dienstag, 18. Februar 2014 15:41
An: [log in to unmask]
Betreff: Re: [FSL] BASIL blood-tissue partition coefficient
A value of partition co-efficient of 0.9 (whole brain) is used within the kinetic model within BASIL - although this contribution is almost negligible. We have not made it (easily) possible to change this value.
A partition co-efficient value is also used within the calibration/M0 calculation where M0 is calculated within a specific 'tissue', e.g. CSF, first and then converted to M0 of aerial blood. A specific value is chosen based upon the 'tissue' to be used for M0 calculation,but this can be changed if you use asl_calib directly.
Michael
On 14 Feb 2014, at 15:53, st¨¦phanie giezendanner <[log in to unmask]> wrote:
> Dear FSL experts,
>
> I would like to know how the the blood-tissue partition coefficient (¦Ë) is implemented in BASIL.
> Is it set to a default value?
> Can it be changed with oxford_asl?
> Is it used to normalized the M0a?
> Thank you for answering the questions!
>
> Kind regards, st¨¦phanie
|