Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is somewhat rotated to the right . Patient is status post median sternotomy . Right lower lobe opacity with blunting of the posterior costophrenic angle is worrisome for pneumonia and pleural effusion . No pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Right lower lobe opacity worrisome for pneumonia and small pleural effusion . Subtle left base opacity may be due to atelectasis .