Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild bibasilar atelectasis without definite focal consolidation . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Mild bibasilar atelectasis without definite focal consolidation , however , and the appropriate clinical setting an early pneumonia is difficult to entirely exclude .