Edith,
Try this Have ‘DRG_PERFUSION’ copied to the toolbox folder of SPM8. You
need to run an m-file called ‘setspmmask.m’ (under Utils run mfile)
before doing the analysis to correct for the masking problem with ASL
(subtraction issue).
See attached zip file. Let me know if that helps.
---
Udunna Anazodo, MRT(N), PhD
Research Associate
Lawson Health Research Institute,
St Joseph's Health care London
268 Grosvenor St
London, ON, N6A4V2
E-mail: [log in to unmask]
On 2015-09-24 09:40, MCLAREN, Donald wrote:
> Missing planes should not be an issue.
>
> There is likely an image with no data OR all the data is the same.
> Have you checked every time point to make sure there is data and the
> images are different from each other?
>
> Best Regards,
> Donald McLaren, PhD
>
> On Thu, Sep 24, 2015 at 8:17 AM, Liemburg, EJ (med)
> <[log in to unmask]> wrote:
>
>> Dear all,
>>
>>
>>
>> I am am analyzing first level ASL data in native space. Because the
>> low image values of ASL I have already turned of implicit masking
>> and created an explicit mask. However, for one subject I still get
>> the error ‘No inmask voxels – empty analysis’. I think I
>> still get this error because a few planes do not contain positive
>> values for this subject (although there is a brain in the other
>> planes). I tried to solve this by commenting parts of the spm_spm
>> file, but did not succeed.
>>
>>
>>
>> Can anyone suggest how to estimate the design for this particular
>> subject.
>>
>>
>>
>> Regards,
>>
>>
>>
>> Edith
>>
>>
>>
>> I would prefer not to delete planes from the data, as I will
>> normalize the betafiles after the first level and do a group
>> analysis
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