From ba76a89e138d1d9d5094b1d1971b5b4e98d3234c Mon Sep 17 00:00:00 2001
From: Erik Ziegler <erik.sweed@gmail.com>
Date: Mon, 8 Aug 2016 18:45:17 +0200
Subject: [PATCH] Bug fix for studyThumbnails helper that sometimes runs with
 no data in Lesion Tracker (OHIF-36)

---
 .../components/studyTimepointBrowser/studyTimepointStudy.js   | 4 ++--
 Packages/viewerbase/lib/helpers/studyThumbnails.js            | 4 ++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/Packages/lesiontracker/client/components/studyTimepointBrowser/studyTimepointStudy.js b/Packages/lesiontracker/client/components/studyTimepointBrowser/studyTimepointStudy.js
index 7a095bfa7..ccb05fc5f 100644
--- a/Packages/lesiontracker/client/components/studyTimepointBrowser/studyTimepointStudy.js
+++ b/Packages/lesiontracker/client/components/studyTimepointBrowser/studyTimepointStudy.js
@@ -65,9 +65,9 @@ Template.studyTimepointStudy.events({
 
             if (!alreadyLoaded) {
                 $study.addClass('loading');
-                getStudyMetadata(studyInstanceUid, studyData => {
+                getStudyMetadata(studyInstanceUid, study => {
                     study.displaySets = createStacks(study);
-                    ViewerStudies.insert(studyData);
+                    ViewerStudies.insert(study);
                     instance.select(isQuickSwitch);
                 });
             } else {
diff --git a/Packages/viewerbase/lib/helpers/studyThumbnails.js b/Packages/viewerbase/lib/helpers/studyThumbnails.js
index ad7a97ac6..5c2a4693f 100644
--- a/Packages/viewerbase/lib/helpers/studyThumbnails.js
+++ b/Packages/viewerbase/lib/helpers/studyThumbnails.js
@@ -2,6 +2,10 @@
  * A global Blaze UI helper to get the thumbnails for the given study
  */
 Template.registerHelper('studyThumbnails', study => {
+    if (!study) {
+        return;
+    }
+
     // Find the study's stacks
     const stacks = study.displaySets;