Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates low lung volumes with resultant bronchovascular crowding . A pericardial drain projects over the cardiac silhouette . There is a small amount of new pneumopericardium . Increased opacification of the retrocardiac space likely represents atelectasis . There is no pneumothorax .
    OUTPUT:
    
New small pneumopericardium .