From ecc74a53e097b13851ea8f7be0cabab6b0d82b7f Mon Sep 17 00:00:00 2001
From: Joe Boccanfuso <109477394+jbocce@users.noreply.github.com>
Date: Wed, 7 Jan 2026 16:14:20 -0500
Subject: [PATCH] fix(segmentation): Use active segmentation for navigation.
 (#5692)

---
 .../components/NavigationComponent/NavigationComponent.tsx   | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/extensions/cornerstone/src/components/NavigationComponent/NavigationComponent.tsx b/extensions/cornerstone/src/components/NavigationComponent/NavigationComponent.tsx
index 6fb85cf20..03edf10b7 100644
--- a/extensions/cornerstone/src/components/NavigationComponent/NavigationComponent.tsx
+++ b/extensions/cornerstone/src/components/NavigationComponent/NavigationComponent.tsx
@@ -87,7 +87,10 @@ function NavigationComponent({ viewportId }: { viewportId: string }) {
         return;
       }
 
-      const segmentationId = segmentationsWithRepresentations[0].segmentation.segmentationId;
+      const activeSegmentationWithRepresentation = segmentationsWithRepresentations.find(
+        segmentation => segmentation?.representation?.active
+      );
+      const segmentationId = activeSegmentationWithRepresentation.segmentation.segmentationId;
 
       utils.handleSegmentChange({
         direction,