diff --git a/static/js/dicomViewer.js b/static/js/dicomViewer.js
index a50ccceb..f7182ca1 100644
--- a/static/js/dicomViewer.js
+++ b/static/js/dicomViewer.js
@@ -642,6 +642,8 @@ export function loadCornerstone(main_element, db, images, annotations_to_load, l
 
             let img;
 
+            console.log("load thumb", image_url);
+
             if (image_url.startsWith("data")) {
                 // based (image) data url, just load the image directly
                 if (image_url.startsWith("data:image/")) {