Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided AICD device is noted with leads terminating in the right atrium , right ventricle , and region of the coronary sinus . Moderate cardiomegaly is re - demonstrated . The aorta is diffusely calcified . Widening of the mediastinum superiorly is unchanged . There is mild pulmonary vascular congestion , which may be accentuated by supine positioning , low lung volumes and AP technique . Low lung volumes are noted . Patchy opacities in the lung bases may reflect atelectasis though infection or aspiration can not be excluded in the correct clinical setting . No focal consolidation , pleural effusion or pneumothorax is otherwise demonstrated . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes . Possible mild pulmonary vascular congestion and bibasilar patchy opacities which may reflect atelectasis . Infection or aspiration can not be excluded in the correct clinical setting .