Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate hyperexpansion of the lungs with flattening of the hemidiaphragms is unchanged . The left suprahilar opacity present since ___ is redemonstrated . The lungs are otherwise clear . The cardiomediastinal silhouette , hilar contours , pleural surfaces are normal . The thoracic aorta is calcified . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . No acute intrathoracic process . 2 . Unchanged hyperinflation of the lungs consistent with known COPD .