diff --git a/src/views/trials/trials-panel/reading/dicoms/components/Fusion/FusionForm.vue b/src/views/trials/trials-panel/reading/dicoms/components/Fusion/FusionForm.vue
index 6296bb66..d5cfff33 100644
--- a/src/views/trials/trials-panel/reading/dicoms/components/Fusion/FusionForm.vue
+++ b/src/views/trials/trials-panel/reading/dicoms/components/Fusion/FusionForm.vue
@@ -160,7 +160,10 @@ export default {
         taskBlindName: '',
         isBaseLineTask: null,
         ctSeriesInfo: {},
-        petSeriesInfo: {}
+        petSeriesInfo: {},
+        defaultStudyId: '',
+        defaultCTSeriesId: '',
+        defaultPTSeriesId: ''
       },
       visitTaskId: '',
       taskList: [],
@@ -197,6 +200,9 @@ export default {
       this.studyList = this.taskList[0].StudyInfoList
       const studyIdx = this.taskList[0].StudyInfoList.findIndex(i => i.StudyId === this.taskList[0].StudyId)
       this.fusionForm.studyId = this.studyList[studyIdx].StudyId
+      this.fusionForm.defaultStudyId = this.taskList[0].StudyId
+      this.fusionForm.defaultCTSeriesId = this.taskList[0].CTSeriesId
+      this.fusionForm.defaultPTSeriesId = this.taskList[0].PTSeriesId
       this.ctSeries = this.studyList[studyIdx].CTSeriesList
       this.petSeries = this.studyList[studyIdx].PTSeriesList
       const ctSexiesIdx = this.ctSeries.findIndex(i => i.Id === this.taskList[0].CTSeriesId)
@@ -254,11 +260,30 @@ export default {
       this.studyList = idx > -1 ? this.taskList[idx].StudyInfoList : []
       this.fusionForm.taskBlindName = idx > -1 ? this.taskList[idx].TaskBlindName : ''
       this.fusionForm.isBaseLineTask = idx > -1 ? this.taskList[idx].IsBaseLineTask : null
+      this.studyList = idx > -1 ? this.taskList[idx].StudyInfoList : null
+      this.fusionForm.studyId = ''
+      this.fusionForm.defaultStudyId = idx > -1 ? this.taskList[idx].StudyId : ''
+      this.fusionForm.defaultCTSeriesId = idx > -1 ? this.taskList[idx].CTSeriesId : ''
+      this.fusionForm.defaultPTSeriesId = idx > -1 ? this.taskList[idx].PTSeriesId : ''
+      this.ctSeries = []
+      this.petSeries = []
     },
     handleStudyIdChange(v) {
       var idx = this.studyList.findIndex(i => i.StudyId === v)
       this.ctSeries = idx > -1 ? this.studyList[idx].CTSeriesList : []
       this.petSeries = idx > -1 ? this.studyList[idx].PTSeriesList : []
+      if (v === this.fusionForm.defaultStudyId) {
+        this.$nextTick(() => {
+          const ctSexiesIdx = this.ctSeries.findIndex(i => i.Id === this.fusionForm.defaultCTSeriesId)
+          const ptSexiesIdx = this.petSeries.findIndex(i => i.Id === this.fusionForm.defaultPTSeriesId)
+          this.fusionForm.ctSeriesInfo = Object.assign({}, this.ctSeries[ctSexiesIdx])
+          this.fusionForm.petSeriesInfo = Object.assign({}, this.petSeries[ptSexiesIdx])
+          this.$refs.ctSeries.clearSelection()
+          this.$refs.ctSeries.toggleRowSelection(this.ctSeries[ctSexiesIdx])
+          this.$refs.petSeries.clearSelection()
+          this.$refs.petSeries.toggleRowSelection(this.petSeries[ptSexiesIdx])
+        })
+      }
     },
     handleCTSelectionChange(rows) {
       if (rows.length > 0) {