Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded . Linear bibasilar opacities are likely due to atelectasis . There is no confluent consolidation or effusion . Cardiac silhouette is top normal in size . Descending thoracic aorta is tortuous . Degenerative changes seen at the left shoulder and hypertrophic changes are noted in the spine .
    OUTPUT:
    
No definite acute cardiopulmonary process .