Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patchy basilar opacities could be due to atelectasis but raise concern for pneumonia in the appropriate clinical setting . No pleural effusion or pneumothorax is seen . Cardiac silhouette is top - normal to mildly enlarged . Mediastinal contours are unremarkable .
    OUTPUT:
    
Patchy basilar opacity could be due to atelectasis , aspiration , and / or pneumonia .