Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is a small residual right pleural effusion . Mild elevation of the right hemidiaphragm is again noted , with probable subjacent atelectasis , can not exclude pneumonia . Left lung is clear . No pneumothorax . No edema . Cardiomediastinal silhouette appears grossly stable . Bony structures are intact .
    OUTPUT:
    
Small right pleural effusion , likely right lower lung atelectasis , difficult to exclude pneumonia .