Need this to work with my custom image field in stead of the_post_thumbnail

ancestors-image.php

<?php
global $post;
$parents = get_post_ancestors( $post->ID );
/* Get the ID of the 'top most' Page if not return current page ID */
$id = ($parents) ? $parents[count($parents)-1]: $post->ID;
$image = get_field('top_image');

if( $image( $id )) {
  the_post_thumbnail( $id, 'thumbnail');
}
?>

<!-- This is how I currently display the custom image field -->
<?php 
// get an image field
$image = get_field('top_image');

// each image contains a custom field called 'link'
$link = get_field('link', $image['ID']);

// render
?>
<figure class="featured-image">
  <img src="<?php echo $image['url']; ?>" alt="<?php echo $image['alt']; ?>" />
</figure>