Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate well expanded lungs . There is a slight increase in interstitial markings bilaterally . There is a a opacity projecting over the right upper lobe , which may represent a rib overlapping a trifurcation of a vessel versus a nodule . There is massive cardiomegaly , increased in the prior study , which may be with reflective of cardiomyopathy versus pericardial effusion . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
1 . Vague opacity of the right upper lobe may represent trifurcation of a vessel with overlapping rib versus nodule . Recommend CT of the chest for additional evaluation . 2 . Slight increase in interstitial markings bilaterally .