Activation outside the brain

Submitted by Emilia Cheladze on
Hello!
I am doing an analysis using DPRSFA V_2.1 and Matlab 2015b.​ ​Unfortunately, when I complete the below-described analysis, ​I ​am getting​ ​significant ​activation outside of the brain​ (please see ​the picture in ​the ​attachment​)​. ​Would anyone know what could be the cause of th​is​? 
 
​To describe my analysis, ​I have data from two groups of subjects, acquired with different scanning parameters. One group: TR 2.3, vox size 3x3x3, second group TR 2.3 vox size 4x4x4.
 
Steps I did:
Preprocessing (separately for both groups):
Remove first 10 time points
Realignment
Coregistration
Segmentation (New Segment + DARTEL) 
Normalisation (by DARTEL; Voxel Size: 4x4x4)
Nuisance Covariates Regression (Rigid Body 6, method: CompCor)
Filtering 
Smoothing (6 6 6)
Functional Connectivity (with defined ROIs - spheres)
 
Second Level Analysis (for both groups together) - in SPM12. 
 
I would really appreciate any help in identifying the problem.
 
Best regards,
Emilia Cheladze
Attachment Size
ACC.jpg 58.94 KB