Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . The heart is top normal in size . Subtle opacity in the right lung base medially on the frontal projection could represent vascular crowding , less likely pneumonia . The left lung is clear . Mediastinal contour appears grossly stable . No pneumothorax or effusion . Bony structures are intact .
    OUTPUT:
    
Top normal heart size with vague opacity at the right medial lung base which could represent bronchovascular crowding , less likely pneumonia .