Merge pull request #769 from nipreps/fix/nii-plotting

FIX: Coerce `MGHImage`s to `Nifti1Image`s when plotting

Author: effigies

niworkflows/viz/utils.py

@@ -341,11 +341,17 @@ def plot_registration(
     if cuts is None:
         raise NotImplementedError  # TODO
 
+    # nilearn 0.10.0 uses Nifti-specific methods
+    anat_nii = nb.Nifti1Image.from_image(anat_nii)
+
     out_files = []
     if estimate_brightness:
         plot_params = robust_set_limits(anat_nii.get_fdata().reshape(-1), plot_params)
 
     # FreeSurfer ribbon.mgz
+    if contour:
+        contour = nb.Nifti1Image.from_image(anat_nii)
+
     ribbon = contour is not None and np.array_equal(
         np.unique(contour.get_fdata()), [0, 2, 3, 41, 42]
     )