[Freesurfer] defect of cerebellar segmentation in the inferior part

Dear Freesurfers, ****

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

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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****

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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. ****

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

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Thank you for your time.

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Best regards****

Charles****

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