def preprocess_and_convert_to_numpy(nifti_scan: nib.Nifti1Image,
nifti_mask: nib.Nifti1Image) -> list:
""" Convert scan and label to numpy arrays and perform preprocessing
Return: Tuple(np.array, np.array) """
np_scan = nifti_scan.get_fdata()
np_label = nifti_mask.get_fdata()
nifti_mask.uncache()
nifti_scan.uncache()
np_scan = preprocess_scan(np_scan)
np_label = rotate_label(np_label)
assert np_scan.shape == np_label.shape
return np_scan, np_label
