diff --git a/src/src/view/dicomimageview.cpp b/src/src/view/dicomimageview.cpp
index 96646c5..43c6e9c 100644
--- a/src/src/view/dicomimageview.cpp
+++ b/src/src/view/dicomimageview.cpp
@@ -1,4 +1,4 @@
-#include "view/dicomimageview.h"
+#include "view/dicomimageview.h"
 #include <QMessageBox>
 #include <QDebug>
 #include "view/thumbnailImage.h"
@@ -358,9 +358,12 @@ void DicomImageView::setDicomImageView(SeriesImageSet *series)
     LoadSeries(series);
 	//whenver change instance,set scroll value to zero
 	initScrollbar();
+    if (!slotInited){
+        connect(_scrollBar, &QScrollBar::valueChanged, this, &DicomImageView::Slot_scrollValueChanged);
+        connect(this, &DicomImageView::Signal_Transformation, this, &DicomImageView::Slot_Transformation);
+        slotInited = true;
+    }
 
-	connect(_scrollBar, &QScrollBar::valueChanged, this, &DicomImageView::Slot_scrollValueChanged);
-	connect(this, &DicomImageView::Signal_Transformation, this, &DicomImageView::Slot_Transformation);
 }
 
 bool DicomImageView::HasSeries()
diff --git a/src/src/view/dicomimageview.h b/src/src/view/dicomimageview.h
index 5be88d4..6a24e27 100644
--- a/src/src/view/dicomimageview.h
+++ b/src/src/view/dicomimageview.h
@@ -1,4 +1,4 @@
-#pragma once
+#pragma once
 #include <QFrame>
 #include <QOpenGLWidget>
 #include "ClickableScrollBar.h"
@@ -238,4 +238,5 @@ private:
 	bool isCine = false;
 	bool isNegative = false;
 	bool isOverlay = false;
+	bool slotInited = false;
 };