use 3D-CNN to identify delta variant of covid-19 based on Chest CT

Pipeline

Data preprocessing

• Convert CT image from the DICOM format to the NIfTI format. *.dcm => *.nii.gz
• Images are reoriented to the same direction and resampled to the fixed size (128×128×128). *.nii.gz = > *.npy
• Use K-means algorithm to extract lung region from CT images.
• The intensity values are clipped to the range [-1024, 1024] and a z-score normalization is applied based on the mean and standard deviation of the intensity values.

Method