Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Patient is status post median sternotomy . There is a hiatal hernia with air - fluid level seen , best seen on the lateral view . A patchy right mid lung opacity is seen . There is also posterior left base opacity which could represent atelectasis . A new left upper lung opacification is also seen . Cardiac silhouette is difficult to assess , but is likely borderline to mildly enlarged . There is blunting of bilateral posterior costophrenic angles which could be due to trace effusions . No pneumothorax is seen .
    OUTPUT:
    
1 . Right mid lung and left upper lobe opacities raise concern for multifocal pneumonia . Recommend followup to resolution . Posterior left lower lobe opacity may be atelectasis , although an additional focus of consolidation not excluded . 2 . Hiatal hernia .