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Hi Paul,
I’m looking at the practical now and I’m very confused as to what to do to get the 4D nifty image. I see that the _first.bvars files come from FIRST, and that then I need to convert them into the nifty image, but I can’t find where it tells me how to do that. It does not mention first_utils until after the design matrix has been created. If you have time can you help me find this specifically?

Thank you!
Paige

> On Jun 4, 2019, at 8:40 AM, paul mccarthy <[log in to unmask]> wrote:
> 
> Hi Paige,
> 
> You must be skipping some steps - before you can run a higher level
> analysis, you need to use first_utils to convert the .bvars file into
> a 4D nifti image. This is all covered in detail in the practical.
> 
> Cheers,
> 
> Paul
> 
> On 04/06/2019, Elizabeth Paige <[log in to unmask]> wrote:
>> Hi Paul,
>> Thank you for answering! I am using concat_bvars to prepare my
>> segmentations, but I am getting the aforementioned error message when I try
>> to load it to the gui, as I am told to do in the fsl course.
>> Do you know why this error message is happening?
>> Thank you!
>> Paige
>>> On Jun 4, 2019, at 4:17 AM, paul mccarthy <[log in to unmask]>
>>> wrote:
>>> 
>>> Hi Paige,
>>> 
>>> concat_bvars is a preprocessing step needed to prepare sub-cortical
>>> segmentations for a group analysis.
>>> 
>>> I would recommend going through the FSL course material to familiarise
>>> yourself with FSL - there is a good overview of the sub-cortical
>>> analysis pipeline:
>>> 
>>> http://fsl.fmrib.ox.ac.uk/fslcourse/
>>> http://fsl.fmrib.ox.ac.uk/fslcourse/lectures/practicals/seg_struc/index.html#first
>>> 
>>> Cheers,
>>> 
>>> Paul
>>> 
>>> On 04/06/2019, Paige Oden <[log in to unmask]> wrote:
>>>> Hello! I am very new to fsl and I am stuck.
>>>> First, I'm not entirely sure what the output of concat is meant to be,
>>>> but
>>>> it keeps coming out as a document that will not open. The command line
>>>> I'm
>>>> using is:
>>>> 
>>>> concat_bvars c_to_p_to_pdi_R_Hipp.bvars MJF*C_first_R_Hipp.bvars
>>>> MJF*P_first_R_Hipp.bvars MJF*PCI_first_R_Hipp.bvars
>>>> 
>>>> Definitely not sure if that's what I'm supposed to be using, or if
>>>> that's
>>>> what's supposed to be happening, but that's what it is.
>>>> 
>>>> Furthermore, when I try to load this concatenated file into my Higher
>>>> Level
>>>> GLM gui, it says that "This" is an invalid command. I don't know what to
>>>> do
>>>> about this because I don't know where 'This' is coming from.
>>>> 
>>>> Thank you!
>>>> 
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