Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . There has been a significant interval improvement of bilateral alveolar opacities present on ___ . There are some residual streaky opacities in the retrocardiac space which are likely from atelectasis . No pleural effusions are identified . Previous blunting of the right cardiophrenic angle has completely resolved . There is no pneumothorax . Of note , there is an unusual curvilinear opacity tracking along the right margin of the mediastinum of unclear significance . There might be mild cardiomegaly , although assessment is limited in this AP exam . An old posterior rib fracture of the left sixth rib is present .
    OUTPUT:
    
1 . Unusual curvilinear opacity tracking along the right margin of the mediastinum of unclear significance . Dedicated PA and lateral radiographs are recommended for better assessment . 2 . Mild left basilar atelectasis . Otherwise , no evidence of acute cardiopulmonary process . The recommendation in item 1 of the Impression was communicated by Dr ___ to Dr ___ ___ phone on ___ at 8 : 50 am after review of the results with the attending .