Hit build in marsbar instead of import. then select from image, and select
your binarized image, and apply no function. I think that should do it.
Pete
On Fri, 22 Jun 2007, Jiansong Xu wrote:
> Peter, Thanks again.
>
> It works. But, ...
>
> My plan is to use marsbar to calculate the mean BOLD signal changes within
> the big ROI. When I imports this mask into marsbar, marsbar separate the
> ROI into > 60 ROIs. It did exactly what I did not want to do at the first
> step. Can you or anyone else provide a clue to calculate the mean BOLD
> signal changes in this big ROI?
>
> Best
>
> Jiansong
>
>
>> From: Peter LaViolette <[log in to unmask]>
>> Date: Fri, 22 Jun 2007 12:49:36 -0400 (EDT)
>> To: Jiansong Xu <[log in to unmask]>
>> Cc: <[log in to unmask]>
>> Subject: Re: [SPM] roi
>>
>> Hit results, grab the SPM.mat file, and select the contrast you want.
>> Then in the lower right corner of the GUI there is a save button. Press
>> it. You are then saving the glass brain values as an image. Because they
>> are values you have to binarize it (1s and 0s) to create your ROI.
>> Therefore you press imcalc, select the image you just saved, it prompts
>> you for an equation, type in i1>0, which takes all the glass brain voxels
>> that are above zero and changes them to 1. Then name the new image and
>> you are all set.
>> Pete
>>
>> On Fri, 22 Jun 2007, Jiansong Xu wrote:
>>
>>> Peter:
>>>
>>> Thanks. But, I didn't get it. Could you a little bit more detail (the
>>> sequence of button pushes).
>>>
>>> Best
>>>
>>> Jiansong
>>>
>>>
>>>> From: Peter LaViolette <[log in to unmask]>
>>>> Date: Fri, 22 Jun 2007 12:14:16 -0400 (EDT)
>>>> To: Jiansong Xu <[log in to unmask]>
>>>> Cc: <[log in to unmask]>
>>>> Subject: Re: [SPM] roi
>>>>
>>>> Plot the results, hit save, then do an imcalc selecting the image you
>>>> saved, and use the equation i1>0 to binarize it.
>>>> Pete
>>>>
>>>> On Fri, 22 Jun 2007, Jiansong Xu wrote:
>>>>
>>>>> Dear Friend:
>>>>>
>>>>> I'm using SPM2 and want to make a ROI consists of all the significant
>>>>> voxels
>>>>> of a contrast, which too can I use?
>>>>>
>>>>> Thanks
>>>>>
>>>>> Jiansong
>>>>>
>>>>>
>>>>>
>>>
>>>
>>>
>>>
>
>
>
>
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