[FIX] PET-volume : modify iterfields to allow pipeline completion (aramis-lab#1543)

Author: AliceJoubert

clinica/pipelines/pet/volume/pipeline.py

@@ -624,7 +624,7 @@ def _build_core_nodes(self):
                 function=compute_atlas_statistics_task,
             ),
             name="atlas_stats_node",
-            iterfield=["in_image"],
+            iterfield=["image"],
         )
         atlas_stats_node.inputs.atlas_names = self.parameters["atlases"]
 
@@ -795,7 +795,7 @@ def _build_core_nodes(self):
                     function=compute_atlas_statistics_task,
                 ),
                 name="atlas_stats_pvc",
-                iterfield=["in_image"],
+                iterfield=["image"],
             )
             atlas_stats_pvc.inputs.in_atlas_names = self.parameters["atlases"]