Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left costophrenic angle and left lateral chest are excluded from the field of view . The patient is status post median sternotomy and Core aortic valve replacement . Left - sided dual - chamber pacemaker device with leads terminating in the right atrium and right ventricle is re - demonstrated . The heart size remains mildly enlarged . The mediastinal and hilar contours are unchanged , with a moderate size hiatal hernia re - demonstrated . There is no pulmonary edema . Patchy opacities in the lung bases likely reflect atelectasis . No large right pleural effusion is seen , and assessment for left pleural effusion is limited . No pneumothorax is identified .
    OUTPUT:
    
Low lung volumes . Moderate hiatal hernia . Bibasilar atelectasis . Exclusion of the left costophrenic angle and left lateral chest from the field of view .