diff --git a/invesalius/reader/dicom.py b/invesalius/reader/dicom.py
index 8bf57c1..1c60e39 100644
--- a/invesalius/reader/dicom.py
+++ b/invesalius/reader/dicom.py
@@ -337,7 +337,7 @@ class Parser():
         ds = self.gdcm_reader.GetFile().GetDataSet()
         if ds.FindDataElement(tag):
             data =  str(ds.GetDataElement(tag).GetValue())
-            if (data) and (data != '""'):
+            if (data) and (data != '""') and (data != "None"):
                 return int(data)
         return ""
 
--
libgit2 0.21.2