Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded without evidence of pneumonia . Heart size is normal . The mediastinal and hilar contours are normal . There is slight prominence of interstitial markings reflecting pulmonary vascular congestion without frank pulmonary edema . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Increased interstitial markings could reflect mild pulmonary vascular congestion . There is no evidence of pneumonia .