diff --git a/helpers/images.py b/helpers/images.py
index 7194a4dd..329bc285 100644
--- a/helpers/images.py
+++ b/helpers/images.py
@@ -127,8 +127,8 @@ def print_dicom(dataset, indent=0):
     """
     dont_print = ['Pixel Data', 'File Meta Information Version']
 
-    indent_string = "   " * indent
-    next_indent_string = "   " * (indent + 1)
+    indent_string = "---" * indent
+    next_indent_string = "---" * (indent + 1)
 
     l = []