From f9f4a14bae006a5ba6b1e8d3f11d81e539ab5657 Mon Sep 17 00:00:00 2001
From: Evren Ozkan <evren217@gmail.com>
Date: Mon, 14 Nov 2016 19:22:23 -0500
Subject: [PATCH] Fix a tiny bug by checking study in prior

---
 .../components/viewer/viewportOverlay/viewportOverlay.js      | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Packages/viewerbase/client/components/viewer/viewportOverlay/viewportOverlay.js b/Packages/viewerbase/client/components/viewer/viewportOverlay/viewportOverlay.js
index 019d56160..2caacd8f9 100644
--- a/Packages/viewerbase/client/components/viewer/viewportOverlay/viewportOverlay.js
+++ b/Packages/viewerbase/client/components/viewer/viewportOverlay/viewportOverlay.js
@@ -322,6 +322,10 @@ Template.viewportOverlay.helpers({
 
         // Get study data
         var study = cornerstoneTools.metaData.get('study', this.imageId);
+        if (!study) {
+            return;
+        }
+
         if (study.studyDate === viewportStudies.fetch()[0].studyDate) {
             return 'Prior';
         }