Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . There is new opacity projecting over the right lower lung accompanied with volume loss including a band - like opacity that is fairly typical for atelectasis ; however much of the opacity is ill - defined . The left lung appears clear with resolution of opacity in the left costophrenic sulcus . There is no pleural effusion or pneumothorax . A prior right posterolateral ninth rib fracture appears unchanged .
    OUTPUT:
    
More vague opacity in the right lower lung ; although a component of this opacity appears typical for atelectasis , findings are concerning for pneumonia in the appropriate setting .