Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . The lungs are well expanded and clear . There is no focal consolidation , effusion or pneumothorax . Cardiac and mediastinal contours are normal . There is no evidence of pneumomediastinum . There is right lower lobe opacity is similar to prior scan and likely represents summation of vascular shadows and .
    OUTPUT:
    
No acute cardiopulmonary process .