diff --git a/invesalius/control.py b/invesalius/control.py
index a02a8f4..a71c2bf 100755
--- a/invesalius/control.py
+++ b/invesalius/control.py
@@ -40,10 +40,10 @@ class Controller():
 
         for key in dicom_series:
             patient_name = key[0]
-            dicom = dicom_series[key][0][0]
+            dicom = dicom_series[key][0]
 
             # Compute how many images per series:
-            n_images = str(len(dicom_series[key][0]))
+            n_images = str(len(dicom_series[key]))
             # Add date and time in a single field:
             date_time = "%s %s"%(dicom.acquisition.date,
                                 dicom.acquisition.time)
diff --git a/invesalius/reader/dicom_grouper.py b/invesalius/reader/dicom_grouper.py
index c4b4e78..ce3d0fe 100644
--- a/invesalius/reader/dicom_grouper.py
+++ b/invesalius/reader/dicom_grouper.py
@@ -286,8 +286,10 @@ class DicomGroups:
                 key = tmp1.keys()[m]
                 information = tmp1[key]
                 
-                new_key = (x,information.patient.name, information.image.orientation_label, 
-                          information.acquisition.serie_number)
+                #new_key = (x,information.patient.name, information.image.orientation_label, 
+                #          information.acquisition.serie_number)
+                 
+                new_key = (information.patient.name, None, x, information.image.orientation_label)
                       
                 if (new_key in groups_dcm_.keys()):
                     groups_dcm_[new_key].append(information)
--
libgit2 0.21.2