Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs . The lungs are clear . There is no pleural effusion or pneumothorax . Prominent costochondral calcifications are unchanged from prior radiographs . The heart size is top normal . The cardiac , hilar , and mediastinal contours are within normal limits .
    OUTPUT:
    
No acute cardiopulmonary process .