I found this link is expired. So just update it.
@@ -4,7 +4,7 @@
## stent.nrrd
A 3D volume converted from stent.npz from the imageio project.
-https://imageio.readthedocs.io/en/stable/getting_started/standardimages.html
+https://imageio.readthedocs.io/en/stable/user_guide/standardimages.html
It is in the public domain.
Yao Hsiao