Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Dual lead left - sided pacemaker is similar in position . Patient is status post median sternotomy . There are bilateral pleural effusions , right greater than left , with overlying atelectasis . Moderate pulmonary vascular congestion is seen . Cardiac silhouette is difficult to accurately assess due to bibasilar opacities . The aorta is calcified . Bones are diffusely osteopenic .
    OUTPUT:
    
Low lung volumes . Bilateral pleural effusions with overlying atelectasis . Moderate pulmonary vascular congestion .