diff --git a/atlas/api.py b/atlas/api.py
index e9ed77bc..bc16dcf7 100644
--- a/atlas/api.py
+++ b/atlas/api.py
@@ -285,7 +285,7 @@ def series_split_by_tag(request, series_id: int, dicom_tag:str):
         print(image)
         ds = image.get_dicom_data()
 
-        print("2a", ds[dicom_tag])
+        #print("2a", ds[dicom_tag])
 
         if dicom_tag in ds:
             val = ds[dicom_tag].value
@@ -295,7 +295,7 @@ def series_split_by_tag(request, series_id: int, dicom_tag:str):
             else:
                 image_map[val].append(image)
         else:
-            return [f"{dicom_tag} not found"]
+            return [f"{dicom_tag} not found {image}"]
 
     new_series = []
     case = series.case.all()
diff --git a/atlas/templates/atlas/series_viewer.html b/atlas/templates/atlas/series_viewer.html
index 3371d271..8c1e77d6 100755
--- a/atlas/templates/atlas/series_viewer.html
+++ b/atlas/templates/atlas/series_viewer.html
@@ -92,6 +92,9 @@
         <summary>
             Image details
         </summary>
+        <form  hx-post="{% url 'atlas:image_diff' %}"
+        hx-target="#temp"
+        >
         {% for image in series.get_images %}
             [{{  image.id  }}] <a href='{% url "atlas:series_image_dicom" image.pk %}'>{{image.image.url}}</a>, pos: {{image.position}}, {{image.upload_filename}}
 
@@ -102,15 +105,34 @@
 
             {{image.image_md5_hash}} ({{image.is_dicom}}) {{image.image_blake3_hash}}
 
+            <input type="checkbox" name="image-id" value="{{image.id}}">
+
             <br />
         {% comment %} {{image.get_dicom_info|safe}}<br /> {% endcomment %}
 
         {% endfor %}
+        <button>Diff files</button>
+        </form>
+        <span id="temp"></span>
     </details>
 
     <p>Total image size: {{series.get_total_image_size|filesizeformat}}</p>
     <p><a href="{% url 'atlas:series_download' pk=series.pk %}">Download images</a></p>
 </details>
+        <span id="diff-controls">show <span id="diff-show-all" _="on click 
+            log '1'
+            for row in .diff.rows
+                show row
+            end">all</span> <span id="diff-show-diff" _="
+        on click
+            log 'go'
+            for row in <.diff tr/>
+                log row.children[0].innerHTML
+                if row.children[0].innerHTML is empty
+                    hide row
+                end
+            end
+        ">diff</span></span>
 
 
 <script>
@@ -208,6 +230,14 @@
 
         });
 
+        $("#diff-show-all").click(() => {
+            console.log("Helol");
+        })
+        $("#diff-show-diff").click(() => {
+            console.log("diff");
+        })
+
+
         {% if editing_finding > 0 %}
             $("#hidden-form").show()
             setTimeout(function() {
diff --git a/atlas/urls.py b/atlas/urls.py
index efb589ce..63a3e93e 100755
--- a/atlas/urls.py
+++ b/atlas/urls.py
@@ -214,6 +214,11 @@ urlpatterns = [
         views.series_order_dicom,
         name="series_order_dicom",
     ),
+    path(
+        "images/<diff",
+        views.image_diff,
+        name="image_diff",
+    ),
     path(
         "series/<int:pk>/download",
         views.SeriesImagesZipView.as_view(),
diff --git a/atlas/views.py b/atlas/views.py
index 9bd794e8..841321e2 100755
--- a/atlas/views.py
+++ b/atlas/views.py
@@ -17,6 +17,7 @@ from django.core.exceptions import (
 from django.contrib.auth.mixins import LoginRequiredMixin, PermissionRequiredMixin
 from django.views.generic import View
 from django.views.generic.detail import DetailView
+import pydicom
 from generic.mixins import SuperuserRequiredMixin
 
 from django.views.generic.edit import CreateView, UpdateView, DeleteView, FormView
@@ -116,7 +117,7 @@ import plotly.express as px
 from django.core.cache import cache
 from django.conf import settings
 
-from helpers.images import image_as_base64
+from helpers.images import image_as_base64, print_dicom
 
 import logging
 from copy import deepcopy
@@ -130,6 +131,7 @@ import reversion
 from rest_framework import viewsets
 
 import os
+import difflib
 
 logger = logging.getLogger(__name__)
 
@@ -1039,6 +1041,32 @@ def series_order_dicom(request, pk):
 
     return redirect("atlas:series_detail", pk=pk)
 
+@login_required
+def image_diff(request):
+    if request.htmx:
+
+        image_ids = request.POST.getlist("image-id")
+
+        first: SeriesImage = get_object_or_404(SeriesImage, pk=image_ids[0])
+        second: SeriesImage = get_object_or_404(SeriesImage, pk=image_ids[1])
+
+        first_ds = pydicom.read_file(first.image.file)
+        #del first_ds.PixelData
+        #j1 = first_ds.to_json_dict()
+        f = print_dicom(first_ds, join=False)
+
+        second_ds = pydicom.read_file(second.image.file)
+        #del second_ds.PixelData
+        #j2 = second_ds.to_json_dict()
+        s = print_dicom(second_ds, join=False)
+
+        diff = difflib.HtmlDiff().make_table(f, s)
+
+        return HttpResponse(diff)
+
+
+    return HttpResponse("Fail")
+
 
 @login_required
 def series_image_dicom(request, pk):
diff --git a/helpers/images.py b/helpers/images.py
index f8f74482..2cce0ff9 100644
--- a/helpers/images.py
+++ b/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:
diff --git a/rad/static/css/anatomy.css b/rad/static/css/anatomy.css
index 83e93538..663c34c7 100644
--- a/rad/static/css/anatomy.css
+++ b/rad/static/css/anatomy.css
@@ -1117,4 +1117,16 @@ table .peninsula-trainee::before {
 
 .show-on-hover:hover {
   opacity: 100%;
+}
+
+.diff_add {
+  color: green;
+}
+
+.diff_sub {
+  color: red;
+}
+
+tr:has(> td > a) {
+    border: 1px blue solid
 }
\ No newline at end of file