Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged , including mild unfolding of the thoracic aorta . The heart is normal in size . Pleural effusions have resolved . Lung volumes are low , and in that setting predominantly streaky basilar opacities may be seen with atelectasis . Developing pneumonia is possible , however , particularly at the left lung base where opacity is more ill - defined . There is no pneumothorax .
    OUTPUT:
    
Possible developing opacity at the left lung base , for which correlation with clinical presentation is recommended . It is probably within the lingula noting silhouetting of the left cardiac border . A streaky right basilar opacity appears similar to a prior chest CT finding .