Thanks but I can't find it. The only volume I seem to be able to enter is
the coil sensitivity reference image and the reference tissue mask.
Am I missing something?
Cheers,
Andreas
Am 13.05.13 11:04 schrieb "Michael Chappell" unter
<[log in to unmask]>:
>The M0 image goes in on the calibration tab of the GUI.
>
>Michael
>
>On 10 May 2013, at 10:30, Andreas Bartsch <[log in to unmask]> wrote:
>
>> Hi Michael,
>>
>> where does the M0 calibration image enter into the Asl_gui?
>> Thanks + cheers,
>> Andreas
>>
>> Am 10.05.13 10:54 schrieb "Michael Chappell" unter
>> <[log in to unmask]>:
>>
>>> If you are trying to quantify resting perfusion from pASL data then the
>>> easiest thing to do is use oxford_asl (or the new user interface
>>>Asl_gui)
>>> - I would recommend that you make sure you are using FSL 5.0.3 for
>>>this,
>>> since it handles single TI data better.
>>>
>>> In essence what you need to do if you want absolute perfusion are three
>>> steps (all carried out by the GUI now):
>>> 1. Tag-control subtraction (asl_file).
>>> 2. Kinetic model inversion (oxford_asl does this)
>>> 3. Calibration (estimation of M0a) (oxford_asl or asl_calib)
>>> If you can live with relative perfusion then the first step might be
>>>all
>>> you want to start with. I think that correction for partial volume
>>> effects is a good idea, but this is not widely used as of yet in the
>>> community so it can currently be harder to interpret the results since
>>> there is less literature to refer to.
>>> Motion correction is generally a good idea and mcflirt can be used as a
>>> first step. Motion correction can be problematic with ASL data though.
>>>
>>> Michael
>>>
>>> On 9 May 2013, at 14:00, Dídac Vidal <[log in to unmask]> wrote:
>>>
>>>> Hi everybody!.
>>>>
>>>> I am trying to preprocess fMRI perfusion data with BASIL toolset
>>>> scripts for first time in a pASL with single TI data and I am getting
>>>>a
>>>> little confused.
>>>>
>>>> I think I would use
>>>> a) asl_reg for registration,
>>>> b) asl_file in order to get a CBF quantification,
>>>> and then I woul use c) asl_calib in order to get an absolute
>>>> quantification of CBF.
>>>>
>>>> My questions are:
>>>> 1) is that correct?
>>>> 2) I am missing something?
>>>> Is PVE recommended /necessary?
>>>> I guess some motion correction should be carried out before asl_file?
>>>> Probably mcflirt should work fine.
>>>>
>>>> Thanks in advance
>>>>
>>
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