From 8d2b7c0119f6b8bba72f462031f8c4f86bb32889 Mon Sep 17 00:00:00 2001
From: Forrest <forrest.li@kitware.com>
Date: Tue, 6 Aug 2024 14:49:51 -0400
Subject: [PATCH] fix(dicom): handle missing w/l tags

---
 src/store/datasets-dicom.ts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/store/datasets-dicom.ts b/src/store/datasets-dicom.ts
index 176c2848..41da3478 100644
--- a/src/store/datasets-dicom.ts
+++ b/src/store/datasets-dicom.ts
@@ -118,7 +118,13 @@ export const getDisplayName = (info: VolumeInfo) => {
 
 export const getWindowLevels = (info: VolumeInfo) => {
   const { WindowWidth, WindowLevel } = info;
-  if (WindowWidth === '') return []; // missing tag
+  if (
+    WindowWidth == null ||
+    WindowLevel == null ||
+    WindowWidth === '' ||
+    WindowLevel === ''
+  )
+    return []; // missing tag
   const widths = WindowWidth.split('\\').map(parseFloat);
   const levels = WindowLevel.split('\\').map(parseFloat);
   if (