Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . The pulmonary interstitium has a mildly coarsened appearance including ___ B lines , particularly at the right lung base . There is no definite pleural effusion or pneumothorax . This appearance includes a vague nodular opacity projecting over the right lower lung . An area of developing pneumonia or atelectasis could be considered but a lung nodule is also a possibility to exclude .
    OUTPUT:
    
Coarse interstitial markings , suggestive of mild vascular congestion or fluid overload . Airway inflammation could also contribute to coarse interstitial markings . There is a possible nodular opacity projecting over the right lower lung . Short - term followup radiographs are recommended , preferably with PA and lateral technique if possible , in order to see whether it may persist and needs further evaluation .