I am experiencing recurrent issue while performing cerebellar segmentation on T1 images.

 

These are the characteristics of the acquisition:

§  T1: field of view (FOV) = 230 mm

§  repetition time (TR) = 1140 msec

§  echo time (TE) = 4.38 msec

§  matrix size 256 × 256

§  interpolated to 512 × 512

§  yielding an in-plane voxel size of 0.45 mm × 0.45 mm

§  slice thickness of 0.9 mm

After recon-all (ended without errors) I always end up with the same error in segmentation (see attached file) : there is the same defect of segmentation in the inferior part of cerebellum. 

 

Are you aware of any way to correct this defect ? (I think this might be related to the low resolution of my images)

Thank you for your time. 

Best regards

Charles