Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest . The lungs are clear and mildly hyperexpanded . There are no focal opacities concerning for infectious process . The cardiac and mediastinal contours are normal . Apical thickening bilaterally . No pleural effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary process .