diff --git a/app/Http/Controllers/Staff/DicomViewerController.php b/app/Http/Controllers/Staff/DicomViewerController.php
index 63bf2a0..e287ef6 100644
--- a/app/Http/Controllers/Staff/DicomViewerController.php
+++ b/app/Http/Controllers/Staff/DicomViewerController.php
@@ -4,6 +4,7 @@
 
 use App\Http\Controllers\HashidControllerBase;
 use App\Models\Study;
+use App\Services\AuditTrail\Activity;
 use Closure;
 use Illuminate\Support\Str;
 
@@ -26,6 +27,7 @@ private function loadViewer(Closure $callback)
         $url = $callback($study);
         abort_if(blank($url), 404);
         $title = Str::limit($study->getPatientDemographic(), 40);
+        audit()->on($study)->did(Activity::Image_View)->log();
 
         return view('staff.studies.viewer', compact('url', 'title'));
     }
diff --git a/app/Http/Controllers/Staff/HistoryController.php b/app/Http/Controllers/Staff/HistoryController.php
index 67c7e21..a933c75 100644
--- a/app/Http/Controllers/Staff/HistoryController.php
+++ b/app/Http/Controllers/Staff/HistoryController.php
@@ -43,7 +43,7 @@ public function save(StudyHistoryRequest $request)
         $details->update($payload);
 
         audit()
-            ->did(Activity::Study_History_Update)
+            ->did(Activity::Study_History_Edit)
             ->on($this->key)
             ->log();
 
diff --git a/app/Services/AuditTrail/Activity.php b/app/Services/AuditTrail/Activity.php
index 851baf5..c9b1aad 100644
--- a/app/Services/AuditTrail/Activity.php
+++ b/app/Services/AuditTrail/Activity.php
@@ -13,7 +13,7 @@ enum Activity: int
 
     case Study_History_View = 104;
 
-    case Study_History_Update = 105;
+    case Study_History_Edit = 105;
 
     case Study_Create = 106;
 
@@ -29,6 +29,9 @@ enum Activity: int
     case Attachment_Download = 113;
     case Attachment_Delete = 114;
 
+    // image
+    case Image_View = 150;
+
     // report
 
     case Report_Save = 201;