Body Email Feedburner only featured picture - Wordpress

[Rodrigo Silveira]

Hello, I'm trying to configure Feedburner my site to send via e-mail only prominent image of the post in wordpress !! I just want the title and featured image of the post.

I enter the functions.php of my wordpress theme as follows but not working !! Can anybody help me? See my feed at: //feeds.feedburner.com/projetosdedecorao

function ld_featured_image_in_feed ($ content) {

     global $ post;

     if (is_feed ()) {

         if (has_post_thumbnail ($ post-> ID)) {

             $ Feat_image_output = get_the_post_thumbnail ($ post-> ID, 'medium', array ( 'style' => 'height: 566px; width: 850px important;'));

             $ Content = $ feat_image_output. $ Content;

         }

     }

     return $ content;

     add_filter ('the_content_feed' 'imagem_destaque_em_rss');