add basic dicom diff support

helpers/images.py

@@ -126,7 +126,7 @@ def pretty_print_dicom(dataset, indent=0):
     return "".join(l)
 
 
-def print_dicom(dataset, indent=0, include_tag_ids=True):
+def print_dicom(dataset, indent=0, include_tag_ids=True, join=True, join_text="\n<br/>"):
     """Go through all items in the dataset and print them with custom format
 
     Modelled after Dataset._pretty_str()
@@ -142,7 +142,12 @@ def print_dicom(dataset, indent=0, include_tag_ids=True):
         if data_element.VR == "SQ":   # a sequence
             l.append(f"{data_element.tag}: {indent_string}{data_element.name}")
             for sequence_item in data_element.value:
-                l.append(print_dicom(sequence_item, indent + 1))
+                l_ = print_dicom(sequence_item, indent + 1, join=join, join_text=join_text)
+                if join:
+                    l.append(l_)
+                else:
+                    l.extend(l_)
+
                 l.append(next_indent_string + "---------")
         else:
             if data_element.name in dont_print:
@@ -152,7 +157,10 @@ def print_dicom(dataset, indent=0, include_tag_ids=True):
                 if len(repr_value) > 50:
                     repr_value = repr_value[:50] + "..."
                 l.append(f"{data_element.tag}: {indent_string:s} {data_element.name:s} = {repr_value:s}")
-    return "\n<br/>".join(l)
+    if not join:
+        return l
+    
+    return join_text.join(l)
 
 def get_image_dicom_hash(img, dataset=None, hash_type="md5", direct_pixel_data=True) -> (str, bool):
     if dataset is None: