diff --git a/CMakeLists.txt b/CMakeLists.txt
index 73fe606..e55150a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@ project(PercutaneousApproachAnalysis)
 #-----------------------------------------------------------------------------
 set(EXTENSION_HOMEPAGE "http://www.slicer.org/slicerWiki/index.php/Documentation/Nightly/PercutaneousApproachAnalysis")
 set(EXTENSION_CATEGORY "IGT")
-set(EXTENSION_CONTRIBUTORS "Koichiro Murakami (Shiga University of Medical Science, Japan, SPL), Laurent Chauvin (SPL), Junichi Tokuda (SPL)")
+set(EXTENSION_CONTRIBUTORS "Koichiro Murakami (Shiga University of Medical Science, Japan, SPL), Atsushi Yamada (Shiga University of Medical Science, Japan), Laurent Chauvin (SPL), Junichi Tokuda (SPL)")
 set(EXTENSION_DESCRIPTION "The Percutaneous Approach Analysis is used to calculate and visualize the accessibility of liver tumor with a percutaneous approach.")
 set(EXTENSION_ICONURL "http://www.slicer.org/slicerWiki/images/a/ac/PAAlogo-small.png")
 set(EXTENSION_SCREENSHOTURLS "http://www.slicer.org/slicerWiki/images/4/42/Accessibility_clinical.png")
diff --git a/PercutaneousApproachAnalysis/PercutaneousApproachAnalysis.py b/PercutaneousApproachAnalysis/PercutaneousApproachAnalysis.py
index 2fa0d5f..e25b251 100644
--- a/PercutaneousApproachAnalysis/PercutaneousApproachAnalysis.py
+++ b/PercutaneousApproachAnalysis/PercutaneousApproachAnalysis.py
@@ -3,7 +3,7 @@
 from __main__ import vtk, qt, ctk, slicer
 import time
 import math
-
+import string
 
 class PercutaneousApproachAnalysis:
   def __init__(self, parent):
@@ -579,7 +579,7 @@ def onCheckAllPaths(self):
   def onCheckColorMappedSkin(self):
     skinModel = self.skinModelSelector.currentNode()
     modelDisplay = skinModel.GetDisplayNode()
-    scalarSetting = slicer.modulewidget.qMRMLModelDisplayNodeWidget()
+    scalarSetting = slicer.qMRMLModelDisplayNodeWidget()
     scalarSetting.setMRMLModelDisplayNode(modelDisplay)
     displayNode = skinModel.GetModelDisplayNode()
     displayNode.SetActiveScalarName("Normals")
@@ -1135,7 +1135,7 @@ def calcApproachScore(self, point, skinPolyData, obstacleBspTree, skinModelNode=
       displayNode = skinModelNode.GetModelDisplayNode()
       displayNode.SetActiveScalarName("Colors")
       displayNode.SetScalarRange(0.0,20.0)
-      scalarSetting = slicer.modulewidget.qMRMLModelDisplayNodeWidget()
+      scalarSetting = slicer.qMRMLModelDisplayNodeWidget()
       scalarSetting.setMRMLModelDisplayNode(displayNode)
       scalarSetting.setScalarsVisibility(invisible)