Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral pleural effusion is small . There is no pneumothorax . Linear opacity is identified in the left lower lobe . There is bilateral increased perihilar interstitial markings . Cardiac silhouette is mildly enlarged .
    OUTPUT:
    
Linear opacity in the left lower lobe is probably atelectasis . Small bilateral pleural effusions .