Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and Lateral radiograph through the chest were obtained . These demonstrated a linear opacity within the left lower lobe most consistent with atelectasis . No focal opacity to suggest pneumonia is identified . Vessles appear slightly prominent , similar in appearance to prior examination . The cardiomediastinal silhouette is unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No findings convincing for pneumonia . Mild vascular congestion .