Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Cardiac silhouette size is mildly enlarged but similar to the previous examination . Mediastinal and hilar contours are unchanged with similar enlargement of the pulmonary arteries bilaterally . Crowding of bronchovascular structures is present without overt pulmonary edema . Patchy atelectasis is seen in the lung bases without focal consolidation . Blunting of the right costophrenic angle persists , potentially reflective of a trace right pleural effusion . No left - sided pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes . Bibasilar atelectasis and possible trace right pleural effusion . Unchanged mild cardiomegaly without pulmonary edema .