Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest with bilateral nipple markers show clear lungs with no evidence of nodules . There is mild hyperinflation with flattening of the diaphragms , consistent with chronic lung disease . Cardiac and mediastinal contours are normal . Mild bilateral apical thickening is seen . No pneumothorax or pleural effusion is seen .
    OUTPUT:
    
No evidence of lung nodules . No acute infection .