diff --git a/src/views/trials/trials-panel/reading/dicoms3D/components/ReadPage.vue b/src/views/trials/trials-panel/reading/dicoms3D/components/ReadPage.vue
index e14e8ce9..6dc6e792 100644
--- a/src/views/trials/trials-panel/reading/dicoms3D/components/ReadPage.vue
+++ b/src/views/trials/trials-panel/reading/dicoms3D/components/ReadPage.vue
@@ -3843,6 +3843,9 @@ export default {
       if (i === -1) return
       const studyList = this.visitTaskList[i].StudyList
       let series = null
+      if (this.isFusion) {
+        this.activeViewportIndex = 2
+      }
       let curSeriesId = this.$refs[`${this.viewportKey}-${this.activeViewportIndex}`][0].series.Id
       if (obj.segment) {
         let study = studyList.find(item => item.StudyId === obj.segmentGroup.StudyId)