How to show thumb site feed ?

Hi there!

I want to ask, how do show the picture in the feed?
I search on google but can not hopefully. I like the following example script I plug in frontand.

<?php if(function_exists('fetch_feed')) {
	include_once(ABSPATH . WPINC . '/feed.php'); // the file to rss feed generator
	$feed = fetch_feed(array(
	'http://news.domain.com/feed/'
	)); // specify the rss feed
	$feed->set_cache_duration (999); // specify cache duration in seconds
	$limit = $feed->get_item_quantity(7); // specify number of items
	$items = $feed->get_items(0, $limit); // create an array of items
}
if ($limit == 0) echo '<div>The feed is either empty or unavailable.</div>';
else foreach ($items as $item) : ?>
<li>
<h2><a href="<?php echo $item->get_permalink(); ?>" alt="<?php echo $item->get_title(); ?>">
<?php echo $item->get_title(); ?></a></h2>
<span><time><?php echo $item->get_date('j F Y g:i a'); ?></time></span>
</li>
<?php endforeach; ?>

Thanks.