QmitkUSAbstractNavigationStep::FilterVector QmitkUSNavigationStepPlacementPlanning::GetFilter()
{
  FilterVector filterVector;
  filterVector.push_back(m_NodeDisplacementFilter.GetPointer());
  filterVector.push_back(m_NeedleProjectionFilter.GetPointer());
  return filterVector;
}
QmitkUSAbstractNavigationStep::FilterVector QmitkUSNavigationStepMarkerIntervention::GetFilter()
{
  FilterVector filter;
  filter.push_back(m_NeedleProjectionFilter.GetPointer());
  filter.push_back(m_NodeDisplacementFilter.GetPointer());
  filter.push_back(m_TargetOcclusionFilter.GetPointer());
  return filter;
}