k2 component thumbs fetch - joomla

$thumbtempsrc                   = JPATH_ROOT.DIRECTORY_SEPARATOR.'media'.DIRECTORY_SEPARATOR.'k2'.DIRECTORY_SEPARATOR.'items'.DIRECTORY_SEPARATOR.'cache'.DIRECTORY_SEPARATOR.md5("Image".$articletemp->id).'_L.jpg';

                if(file_exists($thumbtempsrc)){
                   $img_temp     = true;
                   $imgpath      = JURI::base().'/media/k2/items/cache/'.md5('Image'.$articletemp->id).'_L.jpg';
                }