diff --git a/src/include/base/infinitiViewer.h b/src/include/base/infinitiViewer.h
index f887a80..07ca0fa 100644
--- a/src/include/base/infinitiViewer.h
+++ b/src/include/base/infinitiViewer.h
@@ -309,6 +309,9 @@ public:
 	void ActiveMeasure(Measure* m);
 	void UnActiveMeasure();
 
+    void ActiveRuler();
+    void UnActiveRuler();
+
 	//for convert vtkEvent to Qt signal
     vtkSignalRaiser* GetSignalRaiser(){
         return &raiser;
@@ -380,6 +383,7 @@ private:
 
     void ReloadCurrentSliceMeasure();
     vtkNew<RulerLegendActor> ruler;
+    bool rulerActive = false;
     void RenderRuler();
     int currentPresetIndex=1;
 
diff --git a/src/src/base/infinitiViewer.cxx b/src/src/base/infinitiViewer.cxx
index 2c92889..9138809 100644
--- a/src/src/base/infinitiViewer.cxx
+++ b/src/src/base/infinitiViewer.cxx
@@ -1022,6 +1022,7 @@ void infinitiViewer::SetInputData(vtkImageData* in)
 #endif
 	this->ImageActor->GetMapper()->SetInputData(in);
 	this->RemoveFusionData();
+	this->ActiveRuler();
 	// this->UpdateDisplayExtent();
 }
 
@@ -1337,3 +1338,11 @@ void infinitiViewer::setUpImageViewer()
 	updateCornerInfoAll();
 }
 
+void infinitiViewer::ActiveRuler() {
+    rulerActive = true;
+}
+
+void infinitiViewer::UnActiveRuler() {
+    rulerActive = false;
+}
+
diff --git a/src/src/view/dicomimageview.cpp b/src/src/view/dicomimageview.cpp
index 10bfdca..4b7c7c9 100644
--- a/src/src/view/dicomimageview.cpp
+++ b/src/src/view/dicomimageview.cpp
@@ -812,6 +812,7 @@ void  DicomImageView::ResetView()
 		//_glWidt->update();
 
 		//_scrollBar = nullptr;
+        _ImageViewer->Delete();
 		_ImageViewer = nullptr;
 		_Series = nullptr;