Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Slightly asymmetric right basilar opacity is thought to be due to summation of shadows and is unchanged from most recent prior . The lungs are otherwise clear , no focal consolidations worrisome for pneumonia identified . Cardiomediastinal silhouette is within normal limits . Old healed posterior right rib fractures is again identified .
    OUTPUT:
    
No definite acute cardiopulmonary process .