Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The nodular opacity seen on lateral view projecting over the anterior cardiac silhouette is an area of atelectasis seen better on recent CTA chest . The lungs are otherwise clear . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
1 . Small retrosternal nodular opacity seen on lateral view corresponds to a focal area of atelectasis on recent CTA . 2 . No acute pulmonary abnormalities .