UWP share only ScrollViewer to External Monitor/MiraCast

i will only show the Image (Koala) to my external monitor over Miracast. the penguin is only as a preview for myself like a presentation App. Is it possible that only the ScrollViewer and inside Image will shown on the Miracast?

here my XAML:

<Page
x:Class="App6.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:App6"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d" Width="335">

<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" Margin="-410,0,-195,65">
    <ScrollViewer x:Name="myScrollViewer" HorizontalAlignment="Left" Height="485" Margin="350,45,0,0" VerticalAlignment="Top" Width="565">
        <Image x:Name="myImage" Height="483" Width="570" Source="Assets/Koala.jpg" Stretch="UniformToFill"/>
    </ScrollViewer>
    <Image x:Name="nextImage" HorizontalAlignment="Left" Height="160" Margin="55,45,0,0" VerticalAlignment="Top" Width="205" Source="Assets/Penguins.jpg"/>

</Grid>

Thanks for your help!

Is it possible that only the ScrollViewer and inside Image will shown on the Miracast?

Yes. You could check scenario 3 of the BasicMediaCasting sample. In this sample, It renders video on Miracast. You also could render images on Miracast. You just need to pass the image's CastingSource Class object to the RequestStartCastingAsync method like the following:

await connection.RequestStartCastingAsync(img.GetAsCastingSource());