diff --git a/platform/core/src/utils/combineFrameInstance.ts b/platform/core/src/utils/combineFrameInstance.ts
index 4202c5b0f..efb07c01f 100644
--- a/platform/core/src/utils/combineFrameInstance.ts
+++ b/platform/core/src/utils/combineFrameInstance.ts
@@ -37,8 +37,8 @@ const combineFrameInstance = (frame, instance) => {
       let imagePositionPatient = instance.DetectorInformationSequence[0].ImagePositionPatient;
       let imageOrientationPatient = instance.ImageOrientationPatient;
 
-      imagePositionPatient = imagePositionPatient.map(it => Number(it));
-      imageOrientationPatient = imageOrientationPatient.map(it => Number(it));
+      imagePositionPatient = imagePositionPatient?.map(it => Number(it));
+      imageOrientationPatient = imageOrientationPatient?.map(it => Number(it));
       const SpacingBetweenSlices = Number(instance.SpacingBetweenSlices);
 
       // Calculate the position for the current frame