Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild pulmonary vascular congestion . A subtle ill - defined opacity in the right upper lung may reflect overlapping shadows , though an underlying parenchymal process may be present . Follow - up radiographs are recommended to assess for interval change . Linear scarring within the right mid lung is unchanged from prior . Linear opacities within the bilateral lung bases likely reflect areas of subsegmental atelectasis . There is stable mild elevation of the left hemidiaphragm , unchanged from prior . The thoracic aorta is tortuous . Cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
Mild pulmonary vascular congestion . Subtle opacity in the right upper lung , possibly representing a confluence of shadows , but follow - up radiographs are recommended to assess for interval change .