您好,我下载后的数据没有image和mask。下载后的数据为sub-r001s001_ses-1_space-MNI152NLin2009aSym_label-L_desc-T1lesion_mask.nii.gz和sub-r001s001_ses-1_space-MNI152NLin2009aSym_T1w.nii.gz。该怎么转化呢