How to Get Teaser Images Of articles in zoo Jooml component

require_once(JPATH_ADMINISTRATOR.'/components/com_zoo/config.php');
                        $zapp     = App::getInstance('zoo');
            // $item->id is article id
                        $zooitems = $zapp->table->item->all(array('conditions' => 'id = '.$item->id));
                        $imgpath  = '';

                        foreach($zooitems as $zooitem){
                            foreach ($zooitem->getElements() as $zooid => $element){
                                if(in_array($element->getElementType(), array('image', 'media'))){
                                   if($element->config->get('name') == 'Teaser Image'){
                                      $imgpath = $element->get('file');
                                   }
                                   if(!$imgpath && $element->config->get('name') == 'Image'){
                                       $imgpath = $element->get('file');
                                   }
                                }
                            }
                        }
                        if($imgpath){
                            $img_temp = true;
                        }