Update app.py

app.py

@@ -103,7 +103,7 @@ class DicomAnalyzer:
                              (display_x, display_y),
                              display_diameter // 2,
                              (0, 255, 255),  # Yellow in BGR
-                             1,
+                             2,  # Increase thickness for better visibility
                              lineType=cv2.LINE_AA)
 
             # Extract visible portion
@@ -121,7 +121,7 @@ class DicomAnalyzer:
         """Handle keyboard inputs for pan"""
         try:
             # Pan amount depends on zoom level
-            pan_amount = int(20 / self.zoom_factor)
+            pan_amount = int(50 / self.zoom_factor)
             
             if key == 'ArrowLeft':
                 self.pan_x = max(0, self.pan_x - pan_amount)