How to set TIFF options in PerlMagick

Hi IM Pros,

I would like to set some TIFF options, before I save my image files.

I have tried this - unfurtunatly without succsess - yet:

$image->Set
		option => 'quantum:polarity=min-is-white',
		option => 'tiff:alpha=unassociated',
		option => 'tiff:imagemask',
		option => "tiff:Tag 32781= My own Tag",
		);


$image->Set( 'tiff:rows-per-strip','154');


Help are more than welcome, have a great time.
Regards Alexander