From d219171e25caf5a7c575080f63819d6f4fe45016 Mon Sep 17 00:00:00 2001
From: Ghadeer Albattarni
 <165973963+GhadeerAlbattarni@users.noreply.github.com>
Date: Wed, 8 Apr 2026 11:54:05 -0400
Subject: [PATCH] fix(cornerstone): read FrameOfReferenceUID from display set
 in viewport service (#5950)

---
 .../services/ViewportService/CornerstoneViewportService.ts    | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/extensions/cornerstone/src/services/ViewportService/CornerstoneViewportService.ts b/extensions/cornerstone/src/services/ViewportService/CornerstoneViewportService.ts
index e3751b78c..f896ed0a4 100644
--- a/extensions/cornerstone/src/services/ViewportService/CornerstoneViewportService.ts
+++ b/extensions/cornerstone/src/services/ViewportService/CornerstoneViewportService.ts
@@ -1333,8 +1333,8 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
       return;
     }
 
-    if (displaySet.frameOfReferenceUID) {
-      return displaySet.frameOfReferenceUID;
+    if (displaySet.FrameOfReferenceUID) {
+      return displaySet.FrameOfReferenceUID;
     }
 
     if (displaySet.Modality === 'SEG') {