Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . There is perhaps slight fluid overload noting mild cephalization and an interstitial prominence in the lower lungs , but not striking . No focal opacities demonstrated .
    OUTPUT:
    
Perhaps slight fluid overload but no convincing evidence for pneumonia .