how to insert in clickable listview header image

Hi All.

I have clickable listview header to sort for column data

<ListView Name="ListView1" BorderThickness="0" 
     ItemsSource="{Binding Path={}}" Visibility="Visible" 
     GridViewColumnHeader.Click="GridViewColumnHeaderClickedHandler" 
     IsSynchronizedWithCurrentItem="True" SelectedValuePath="Test_Id" SelectionMode="Single"><ListView.View><GridView AllowsColumnReorder="True" ColumnHeaderContainerStyle="{StaticResource HeaderStyle}" ><GridViewColumn Header="Check" CellTemplate="{StaticResource Check}" Width="55" /><GridViewColumn Header="Account No" DisplayMemberBinding="{Binding Path=AccountNo}" Width="120"/>
</GridView></ListView.View></ListView>

Now would like to replace Header="Check" by image. How it to do? I will appreaciate for sample.

Thanks.