Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette is unchanged . The thoracic aorta is tortuous . Linear bibasilar opacities are most consistent with atelectasis . There is no pleural effusion or pneumothorax . A right chest wall Port - A - Cath ends in the right atrium . Multilevel compression deformities in the thoracic spine have not changed compared to prior radiographs .
    OUTPUT:
    
Unchanged linear bibasilar opacities most consistent with atelectasis . No definite pneumonia .