Display image field from nid I'm trying to print the image field from a node using the nid in the url.  

$nid = $_GET['field_item_request'];

Is there a specific way to do this?
$nid = arg(1);
$node = node_load($nid);
$image = field_get_items('node', $node, 'field_item_request');
$output = field_view_value('node', $node, 'field_item_request', $image[0]);
print render($output);