[Freesurfer] samseg dice score is low

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Hello dear all,

I use Freesurfer-Samseg for MS lesion segmentation(cross-sectional).

I use the T1 and Flair for this. (just these are inputs) I registered *flair and t1 to DIR *for every patient. (My manual lesion masks are on DIR imaging.) I controlled the registrations

At the beginning i didnt change initial threshold of run_samseg. (default value)

I created a binary lesion mask using different threshold.

*threshold *0.1= *dice* 0,604 *threshold *0.05= *dice *0.611 *threshold *0.001 = *dice *0.599

Do you have any recommendations to increase the dice? It seems that with this way It can't go up about 0.6

Best, Dilek