diff --git a/extensions/cornerstone-dicom-seg/src/viewports/OHIFCornerstoneSEGViewport.tsx b/extensions/cornerstone-dicom-seg/src/viewports/OHIFCornerstoneSEGViewport.tsx
index 4cc6edcc38c..ad2ec97b561 100644
--- a/extensions/cornerstone-dicom-seg/src/viewports/OHIFCornerstoneSEGViewport.tsx
+++ b/extensions/cornerstone-dicom-seg/src/viewports/OHIFCornerstoneSEGViewport.tsx
@@ -294,7 +294,7 @@ function _getReferencedDisplaySetMetadata(referencedDisplaySet, segDisplaySet) {
 
   const PixelMeasures = Array.isArray(PixelMeasuresSequence)
     ? PixelMeasuresSequence[0]
-    : PixelMeasuresSequence;
+    : PixelMeasuresSequence || {};
 
   const { SpacingBetweenSlices, SliceThickness } = PixelMeasures;