Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . Patchy left basilar opacity suggests minor atelectasis , which may be associated with distortion of the thorax by moderate - to - severe rightward convex curvature of the thoracic spine . Accordingly , however , the left base is difficult to assess . The right lung appears clear .
    OUTPUT:
    
No definite evidence for acute cardiopulmonary disease .