fix: fix a ImageViewer delete bug

src/src/Rendering/Viewer/DICOMImageViewer.cxx

@@ -97,6 +97,7 @@ DICOMImageViewer::~DICOMImageViewer() {
         this->ImageMapper = nullptr;
     }
     if (this->ImageActor) {
+        ImageStack->RemoveImage(ImageActor);
         this->ImageActor->Delete();
         this->ImageActor = nullptr;
     }
@@ -106,10 +107,15 @@ DICOMImageViewer::~DICOMImageViewer() {
         this->FusionMapper = nullptr;
     }
     if (this->FusionActor) {
+        ImageStack->RemoveImage(FusionActor);
         this->FusionActor->Delete();
         this->FusionActor = nullptr;
     }
-
+    if (this->ImageStack) {
+        this->Renderer->RemoveActor(ImageStack);
+        this->ImageStack->Delete();
+        // this->ImageStack = nullptr;
+    }
     if (this->Renderer) {
         this->Renderer->Delete();
         this->Renderer = nullptr;
@@ -235,7 +241,7 @@ void DICOMImageViewer::SetInputData(vtkImageData *in) {
     this->ImageActor->GetMapper()->SetInputData(in);
     this->RemoveFusionData();
     this->ActiveRuler();
-    this-> ActiveReferenceLine();
+    this->ActiveReferenceLine();
 }
 
 void DICOMImageViewer::SetInputConnection(vtkAlgorithmOutput *input) {
@@ -345,7 +351,6 @@ void DICOMImageViewer::UnInstallPipeline() {
 void DICOMImageViewer::Render() {
     if (this->FirstRender) {
         //   // Initialize the size if not set yet
-
         vtkAlgorithm *input = this->GetInputAlgorithm();
         if (input) {
             input->UpdateInformation();
@@ -363,6 +368,7 @@ void DICOMImageViewer::Render() {
                 ResetZoomScaleToFitWindowSize();
             }
             this->FirstRender = 0;
+            return;
         }
     }
     if (this->GetInput()) {