diff --git a/rcr/filters.py b/rcr/filters.py
index 3eb2af84..58985659 100755
--- a/rcr/filters.py
+++ b/rcr/filters.py
@@ -31,6 +31,14 @@ def get_assessor(request):
 
     return queryset
 
+class OutcomeFilter(django_filters.FilterSet):
+    class Meta:
+        model = Item
+        fields = { 
+            "outcome": ["exact"],
+        }
+
+
 class ItemFilter(django_filters.FilterSet):
     assigned_to_radiology = django_filters.ModelMultipleChoiceFilter(
         queryset=get_rad, null_label="No user"
diff --git a/rcr/templates/rcr/gap.html b/rcr/templates/rcr/gap.html
index 92ea41b9..ccc94125 100644
--- a/rcr/templates/rcr/gap.html
+++ b/rcr/templates/rcr/gap.html
@@ -3,9 +3,19 @@
 {% block content %}
 
 <h1>Radiology Gap Analysis</h1>
+
+    <details>
+        <summary>Filter</summary>
+        <form method="get">
+            {{ item_filter.form.as_p }}
+            <input type="submit" />
+        </form>
+    </details>
+
+
 <p>This page lists all of the radiology categories and the items that exist within them. The items are grouped by category.</p>
 <button _='on click toggle .visible on .id'> Toggle IDs</button>
-<br/>
+{% comment %} <br/>
 Show outcomes
 
 {% for outcome in outcomes %}
@@ -13,12 +23,12 @@ Show outcomes
 <label for="{{outcome.name}}">{{outcome.name}}</label><input type="checkbox" name="{{outcome.name}}" value="{{outcome}}" checked
 _="on click if me.checked show .outcome-{{outcome.id}} else hide .outcome-{{outcome.id}} end">
 </span>
-{% endfor %}
+{% endfor %} {% endcomment %}
     
 
 
 
-{% for category in categories %}
+{% for category, items in filtered_categories %}
 
 <h2>{{category.name}}</h2>
 
@@ -33,7 +43,7 @@ _="on click if me.checked show .outcome-{{outcome.id}} else hide .outcome-{{outc
         <th>Radiology condition</th>
     </tr>
 
-{% for item in  category.items_radiology.all %}
+{% for item in  items %}
     <tr class="outcome-{{item.outcome.id}}">
         <td class="id">{{item.rcr_platform_id}}</td>
         <td>{{item.name}}</td>
@@ -47,7 +57,7 @@ _="on click if me.checked show .outcome-{{outcome.id}} else hide .outcome-{{outc
 </table>
 
 <p>
-Item count: {{category.items_radiology.count}}
+Item count: {{items.count}}
 </p>
     
 {% endfor %}
diff --git a/rcr/views.py b/rcr/views.py
index 7dfa0ec3..4d3a9836 100644
--- a/rcr/views.py
+++ b/rcr/views.py
@@ -11,7 +11,7 @@ from django.contrib.auth.models import User
 from django.contrib.auth.decorators import user_passes_test
 
 from django.db.models import Q
-from rcr.filters import ItemFilter
+from rcr.filters import ItemFilter, OutcomeFilter
 
 from rcr.models import Item, Outcome, RadiologyCategory
 from rcr.forms import AssessorAssignmentForm, ItemForm
@@ -76,17 +76,24 @@ def radiology_review(request):
 def radiology_gap(request):
     #items = Item.objects.all().prefetch_related("assessed_by")
 
-    item_filter = ItemFilter(request.GET, queryset=Item.objects.all().prefetch_related("assessed_by"))
-    items = item_filter.qs.prefetch_related("assessed_by")
+    item_filter = OutcomeFilter(request.GET, queryset=Item.objects.all().prefetch_related("assessed_by"))
+    items = item_filter.qs
 
     categories = RadiologyCategory.objects.all().order_by("name").prefetch_related("items_radiology", "items_radiology__level", "items_radiology__radiology_condition")
 
+    filtered_categories = []
+
+    for category in categories:
+        filtered_categories.append((category, item_filter.qs.intersection(category.items_radiology.all())))
+
+
     conditions = Condition.objects.all().order_by("name")
 
     outcomes = Outcome.objects.all().order_by("name")
 
     return render(request, "rcr/gap.html", {"items": items, 
                                             "item_filter": item_filter,
+                                            "filtered_categories": filtered_categories,
                                             "categories": categories,
                                             "conditions": conditions,
                                             "outcomes": outcomes,