Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . There is vague opacity measuring about 25 mm that projects over the lateral right upper lung . Projecting over the upper mid left lung is a more linear opacity measuring about 7 mm in width and perhaps 4 - 5 cm in length . Elsewhere , the lungs appear clear . There is slight leftward convex curvature centered along the lower thoracic spine as well as very mild exaggeration of kyphotic curvature . Mid thoracic interspaces are mildly narrowed .
    OUTPUT:
    
No definite evidence of acute disease . Patchy opacities in each upper lung , with a morphology suggestive of scarring on the left , while particularly referring to the right , there is potentially a substantial nodule . When clinically appropriate , chest CT evaluation is recommended as well as correlation with prior radiographs , if available .