diff --git a/invesalius/data/cursor_actors.py b/invesalius/data/cursor_actors.py
index 3f1cb05..6a1b704 100644
--- a/invesalius/data/cursor_actors.py
+++ b/invesalius/data/cursor_actors.py
@@ -300,13 +300,15 @@ class CursorRectangle:
         px, py, pz = self.edition_position
         orient = self.orientation
         xs, ys, zs = self.spacing
+        abs_pixel = {"AXIAL": lambda x,y: (px + x / xs, py+(y/ys), pz),
+                     "CORONAL": lambda x,y: (px+(x/xs), py,
+                                            pz+(y/zs)),
+                     "SAGITAL": lambda x,y: (px, py+(x/ys),
+                                             pz+(y/zs))}
+        function_orientation = abs_pixel[orient]
         for pixel_0,pixel_1 in self.pixel_list:
             # The position of the pixels in this list is relative (based only on
             # the area, and not the cursor position).
             # Let's calculate the absolute position
             # TODO: Optimize this!!!!
-            abs_pixel = {"AXIAL": [px+pixel_0/xs, py+(pixel_1/ys), pz],
-                         "CORONAL": [px+(pixel_0/xs), py, pz+(pixel_1/zs)],
-                         "SAGITAL": [px, py+(pixel_0/ys), pz+(pixel_1/zs)]}
-            yield abs_pixel[orient]
-        
+            yield function_orientation(pixel_0, pixel_1)
diff --git a/invesalius/data/viewer_slice.py b/invesalius/data/viewer_slice.py
index 16e8d7b..32a68d9 100755
--- a/invesalius/data/viewer_slice.py
+++ b/invesalius/data/viewer_slice.py
@@ -179,6 +179,8 @@ class Viewer(wx.Panel):
     def OnBrushClick(self, obj, evt_vtk):
         self.mouse_pressed = 1
 
+        mouse_x, mouse_y = self.interactor.GetEventPosition()
+        self.pick.Pick(mouse_x, mouse_y, 0, self.ren)
 
         coord = self.GetCoordinateCursor()
         self.cursor.SetPosition(coord)
@@ -203,6 +205,8 @@ class Viewer(wx.Panel):
         ps.Publisher().sendMessage('Update slice viewer')
 
     def OnBrushMove(self, obj, evt_vtk):
+        mouse_x, mouse_y = self.interactor.GetEventPosition()
+        self.pick.Pick(mouse_x, mouse_y, 0, self.ren)
         coord = self.GetCoordinateCursor()
         self.cursor.SetPosition(coord)
         self.cursor.SetEditionPosition(self.GetCoordinateCursorEdition())
@@ -237,8 +241,6 @@ class Viewer(wx.Panel):
 
     def GetCoordinate(self):
         # Find position
-        mouse_x, mouse_y = self.interactor.GetEventPosition()
-        self.pick.Pick(mouse_x, mouse_y, 0, self.ren)
         x, y, z = self.pick.GetPickPosition()
 
         # First we fix the position origin, based on vtkActor bounds
@@ -277,15 +279,11 @@ class Viewer(wx.Panel):
 
     def GetCoordinateCursor(self):
         # Find position
-        mouse_x, mouse_y = self.interactor.GetEventPosition()
-        self.pick.Pick(mouse_x, mouse_y, 0, self.ren)
         x, y, z = self.pick.GetPickPosition()
         return x, y, z
 
     def GetCoordinateCursorEdition(self):
         # Find position
-        mouse_x, mouse_y = self.interactor.GetEventPosition()
-        self.pick.Pick(mouse_x, mouse_y, 0, self.ren)
         x, y, z = self.pick.GetPickPosition()
 
         # First we fix the position origin, based on vtkActor bounds
--
libgit2 0.21.2