Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac and mediastinal silhouettes are stable . Mild bibasilar atelectasis without definite focal consolidation is seen . There is subtle increased interstitial markings bilaterally which may be due to mild vascular congestion though atypical pneumonia not excluded . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
Mild bibasilar atelectasis without definite focal consolidation . There is subtle increased interstitial markings bilaterally which may be due to mild vascular congestion though atypical pneumonia not excluded .