These numbers are output automatically in the aseg.stats file in v6, eg,

# Measure lhSurfaceHoles, lhSurfaceHoles, Number of defect holes in lh 
surfaces prior to fixing, 17, unitless
# Measure rhSurfaceHoles, rhSurfaceHoles, Number of defect holes in rh 
surfaces prior to fixing, 12, unitless
# Measure SurfaceHoles, SurfaceHoles, Total number of defect holes in 
surfaces prior to fixing, 29, unitless

They will be included as global measures when you run asegstats2table


On 07/12/2018 11:01 AM, Bruce Fischl wrote:
> Hi Lea
>
> the Euler number is an integer, so it will never be 2.5. In fact, in 
> our reconstructed surfaces it will always be exactly 2, except for the 
> *nofix* surfaces, as we explicitly correct the topology of the 
> surfaces (see the Automated Manifold Surgery paper if you are 
> interested in the details)
>
> cheers
> Bruce
>
>
> On Thu, 12 Jul 2018, Backhausen, Lea wrote:
>
>>
>>         External Email - Use Caution
>>
>> Hey Freesurfer Experts,
>>
>> I would like to use the Euler number as a quantitative quality 
>> measure of my reconstructed data as
>> Rosen et al. (2017) recommend in their recently published paper.
>> https://www.sciencedirect.com/science/article/pii/S1053811917310832
>>
>> I figured I can use:
>>
>> mris_euler_number [<options>] insurf     to get the euler number for 
>> each data set.
>>
>> Which surface should I use though? The white or pial surface area or 
>> is there no preference?
>>
>> Does anybody have experience with what range of Euler number would be 
>> acceptable? I read that 2
>> would be perfect but is 2.5 still ok? Or 1? Somehow I could not find 
>> any recommendation in the Rosen
>> paper about thresholds or something similar. Did I miss something?
>>
>> Any advice would be highly appreciated! Thanks!
>>
>> Best,
>> Lea
>>
>> _______________________________________
>>
>> Lea Backhausen, B.Sc.
>>
>> Student Research Assistant
>>
>>
>> Klinik und Poliklinik für Kinder- und Jugendpsychiatrie und 
>> –psychotherapie
>> Tel. +49 (0)351 458-7166
>> Fax +49 (0)351 458-5754
>>
>> Universitätsklinikum Carl Gustav Carus
>> an der Technischen Universität Dresden
>> Anstalt des öffentlichen Rechts des Freistaates Sachsen
>> Fetscherstraße 74, 01307 Dresden
>> http://www.uniklinikum-dresden.de
>> Vorstand: Prof. Dr. med. D. M. Albrecht (Sprecher), Wilfried E. B. 
>> Winzer
>> Vorsitzender des Aufsichtsrates: Prof. Dr. med. Peter C. Scriba
>> USt.-IDNr.: DE 140 135 217, St.-Nr.: 203 145 03113
>>
>>
>>
>
>
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