Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest PA and lateral radiograph demonstrates unremarkable mediastinal and hilar contour . Heart size is top normal . Lungs are hyperexpanded but clear . Flattening of the hemidiaphragms as well as increased retrosternal space are suggestive of emphysematous change . No evidence tuberculosis . Mild wedge deformities of the midthoracic spine are again evident with a stable focal kyphosis .
    OUTPUT:
    
No evidence of tuberculosis . No acute intrathoracic process .